ny - ma - ri...distribution engineering has reviewed all of the findings in the annual trend-based...

NY - MA - RI

Gas Distribution Engineering

Gas Asset Management– Gas Process & Engineering

Saadat Khan (631) 710-3510 Director – Gas Distribution Engineering

Leomary Bader (781) 907-2785 Manager- Gas Distribution Engineering

Aamir Khizar (631) 770-3511 Senior Engineer – Gas Distribution Engineering

Yan Wang-jiang (781) 907-2241 Engineer – Gas Distribution Engineering

Kevin Lim (315) 428-6399 Engineer – Gas Distribution Engineering

Jim MacMartin (315) 428-5054 Assoc. Engineer – Gas Distribution Engineering

Madeline Blaisdell (781) 907-4164 Assoc. Engineer – Gas Distribution Engineering

Enterprise

Gas Distribution Systems

Trend-Based Integrity Analysis

Attachment PUC 4-6 - Docket No. 4916 of 343

Table of Contents

Tab – 1

Overall Regional Gas Distribution Integrity Assessment Summary

Page 4

1.1 Overall Regional Distribution Integrity Assessment Summary……………………………………………………..…. 5, 17-19

Tab – 2 Leak Receipt's, Repairs and Backlog by HDD Trend (Main & Service) ……...….…… 6

2.1 Total Leak Receipts, Repairs & Backlog….…………………………………….....…………………………………..... 7-16

Tab – 3 PHMSA Reported Incidents Cost 20

3.1 Total Property Damages….………….....………………………………………………………………………………… 21-24

Tab – 4 Leak Management Analysis 25

4.1 Total Leak Receipts……………………………………………………………………………………………………...... 26-29

4.2 Leak Receipts as a Function of Total System Pipe Mileage………………………………………………………....... 30-32

4.3 Leak Receipts by Discovery Source (Excluding Damages)……..…………………………………………….…........ 33-41

4.4 Leak Receipts by Original Type (Excluding Damages)...…………………………………………………………..... . 42-52

4.5 Leak Receipts by Repaired Type (Including Damages)...………………………………….……………………......... 53-63

4.6 Year-End Workable Leak Backlogs…………………………………………………………………………………........ 64-67

4.7 Year-End Open Type-3 Leaks………………………………………………………………………………………........ 68-71

Tab – 5 Main Inventory Analysis 72

5.1 Main Inventory Trend (Miles)………………………..……………………………………………………………….....… 73-83

5.2 Main Inventory………………………………………………………………………………………………………........... 84-88

5.3 Average Age of Main by Legacy………………………………………………………………………………….....…. 89-91

5.4 National Grid Main Replacement……………………………………………………………………………….....……. 92

Tab – 6 Main Leak Repair Analysis 93

6.1 Total Main Leak Repairs (Including Damages)....................................................................................................... 94-97

6.2 Total Main Inventory Compared to Leak Repairs................................................................................................... 98-107

6.3 Leaks Repaired by Type (Including Damages)………………….……………………………………………………… 108-118

6.4 Main Leak Repairs (Excluding Damages)............................................................................................................... 119-129

6.5 Main Leaks Repaired (Comparison by Leak Causes)............................................................................................. 130-140

6.6 Total Main Leak “Rates” (Including Damages) ....................................................................................................... 141-145

6.7 Main Leak “Rates” Comparison by Material (Excluding Damages)........................................................................ 146-160

1


Table of Contents Page

Tab – 7 Details of Main Leak Repairs 161

7.1 New York Main Leak Repairs (NYC, LI & Upstate)................................................................................................ 162

7.2 Massachusetts Main Leak Repairs (Boston, Essex, Colonial Cape & Lowell)....................................................... 163

7.3 Rhode Island Main Leak Repairs............................................................................................................................ 164

7.4 US-National Grid Main Leak Repairs...................................................................................................................... 165

Tab – 8 A Closer Look at Cast Iron Mains 166

8.1 New York 10-Year Cast Iron Main Inventory & Attrition “RATE”............................................................................ 167-170

8.2 Massachusetts 10-Year Cast Iron Main Inventory & Attrition “RATE”.................................................................... 171-175

8.3 Rhode Island 10-Year Cast Iron Main Inventory & Attrition “RATE”....................................................................... 176

8.4 US-National Grid 10-Year Cast Iron Main Inventory & Attrition RATE”.................................................................. 177

8.5 Total Cast Iron Main Breaks................................................................................................................................... 178-181

8.6 Cast Iron Main Break “RATES”............................................................................................................................... 182

8.7 Cast Iron Main Break “RATES” by Diameter.......................................................................................................... 183-186

Tab – 9 A Closer Look at Steel Mains 187

9.1 New York 10-Year Unprotected Steel Main Inventory & Attrition “RATE”.............................................................. 188-191

9.2 Massachusetts 10-Year Unprotected Steel Main Inventory & Attrition “RATE”...................................................... 192-196

9.3 Rhode Island 10-Year Unprotected Steel Main Inventory & Attrition “RATE”......................................................... 197

9.4 US-National Grid 10-Year Unprotected Steel Main Inventory & Attrition RATE”.................................................... 198

9.5 Main Corrosion Leak “RATE”.................................................................................................................................. 199-202

Tab – 10 Service Inventory Analysis 203

10.1 New York Service Inventory Trend......................................................................................................................... 204-207

10.2 Massachusetts Service Inventory Trend................................................................................................................. 208-212

10.3 Rhode Island Service Inventory Trend.................................................................................................................... 213

10.4 US-National Grid Service inventory Trend............................................................................................................. 214

10.5 Service Inventory by Material................................................................................................................................. 215-219

2


Table of Contents

Tab – 11

Service Leak Repair Analysis

Page 220

11.1 Total Service Leak Repairs (Including Damages)................................................................................................. 221-231

11.2 Leaks Repaired by Repaired Type (Including Damages)...…………….…………………….…………….….…...... 232-242

11.3 Leak Repairs (Excluding Damages) by Material................................................................................................... 243-253

11.4 Leaks Repaired (Comparison by Leak Causes).................................................................................................... 254-264

11.5 Total Service Leak “Rates” (Including Damages) ................................................................................................. 265-268

11.6 Service Leak “Rates” Comparison by Material (Excluding Damages)................................................................... 269-272

Tab – 12 Material-Cause Matrix (Service Leak Repairs) 273

12.1 New York Service Leak Repairs (NYC, LI & Upstate)........................................................................................... 274-277

12.2 Massachusetts Service Leak Repairs (Boston, Essex, Cape & Lowell)................................................................ 278-282

12.3 Rhode Island Service Leak Repairs ...................................................................................................................... 283

12.4 US-National Grid Service Leak Repairs................................................................................................................. 284

12.5 Gas Meter Purchases ............................................................................................................................................ 285-291

Tab – 13 Distribution DOT Report data Comparisons 292

13.1 New York, Massachusetts, Rhode Island & US-National Grid............................................................................. 293-295

Tab – 14 National Grid-US Gas Distribution System Statistics 296

14.1 Avg. Customer Rate............................................................................................................................................... 297-300

14.2 Gas Distribution System Statistics......................................................................................................................... 301-302

14.3 Separate Leak-Prone Pipe Analysis...................................................................................................................... 303

14.4 Leak and Repair Analysis...................................................................................................................................... 304

Tab – 15 Findings and Explanations 305

15.1 Analysis of Findings and Explanations.................................................................................................................. 306-310

15.2 LPP Replacement Projection................................................................................................................................. 311-314

Tab – 16 Appendices 315

16.1 Main Inventory........................................................................................................................................................ 316-327

16.2 Service Inventory…................................................................................................................................................ 328-339

16.3 End of System Integrity Report 340

3


4

Overall Regional

Gas Distribution Integrity

Assessment Summary


Distribution Engineering has reviewed all of the findings in the annual Trend-Based Distribution System Integrity Analysis (System Integrity Report) in accordance with our Distribution Integrity Management Plan (DIMP), and finds that the leak receipts have declined for two consecutive years for NYS and MA. RI has experienced the lowest amount of leak receipts in the last 10 years which is a testament that the accelerated LPP replacement program is identifying the correct LLP for replacement. There are no immediate causes for concern that would warrant changes to DIMP. Some anomalies were found and either explained as non-systemic or set up for continued research and/or monitoring. These will be explained in notes to this report. CI main break rates have decrease in every region. This is attributed to the mild winter and to the Company’s effort to replace LPP and recondition large diameter CI mains.

Below is a summary of the individual key integrity measure results for the eight (8) federal (PHMSA) filing entities that constitute National Grid-US.

5

Overall Regional Distribution Integrity Assessment Summary

REGIONS KEDNY KEDLI NMPC BGC EGC CCC CLW RI

ITEMS

• Leak Receipts

• Workable Leak Backlog

• LPP Main and Service Inventories

• Overall Main Leak Rate

• Cast Iron Main Break Rate No CI

• Steel Main Corrosion Leak Rate

• Service Leak Rate

Increase Slight Increase No Change Decrease

2017 System Integrity Report Summary


6

LEAK RECEIPTS,

REPAIRS AND BACKLOG

BY HDD TREND

(Main & Service)

NOTE: Heating Degree Day (HDD)


7

TOTAL LEAK RECEIPTS, REPAIRS & BACKLOG INCLUDES ALL TYPE 1, 2A, 2 and 3 LEAKS DISCOVERED - EXCLUDING DAMAGES

2,826 2,747

2,526

3,370 3,383

3,332

4,984

5,812

4,340

4,075

3,020

2,800 2,733

3,470

2,541

3,223

4,923

4,713

4,456 4,650

3,908 3,851

2,973

3,697

4,191

4,481

4,044

3,799 3,653

3,110

0

1,000

2,000

3,000

4,000

5,000

2,000

2,500

3,000

3,500

4,000

4,500

5,000

5,500

6,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days NYC

Leak Receipts and Repairs and Backlog:

2017 NYC Leak Repairs = 2017 NYC Leak Receipts = 2017 NYC Leak Backlogs =


8


5,195 5,837

4,347 4,516 3,912

3,527 3,350 3,935

3,380 3,292 2,678 2,579 2,462

2,793 3,100

2,844 3,067 3,084 3,177 2,925

12,536

13,924 13,965 13,950 13,475

12,430

11,486 11,325

10,555

9,232

-2,000

1,000

4,000

7,000

0

3,000

6,000

9,000

12,000

15,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days LI


2017 LI Leak Repairs = 2017 LI Leak Receipts = 2017 LI Leak Backlogs =


9


1,700

1,708

1,767 1,653

1,213 1,205

1,800

2,122

1,639

1,633

1,795

2,071

1,964

1,799

1,474 1,498

1,857

2,879

1,753

1,454 1,328

1,620

1,810 1,735

1,679 1,650

1,547

919 940 970

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

900

1,400

1,900

2,400

2,900

3,400

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days UNY

Leak Receipts and Repairs and Backlog :

2017 UNY Leak Repairs = 2017 UNY Leak Receipts = 2017 UNY Leak Backlogs =

0 Attachment PUC 4-6 - Docket No. 4916

of 343

10


9,721 10,292

8,640 9,539

8,508 8,064

10,134

11,869

9,359 9,000

7,493 7,450 7,159 8,062

7,115 7,565

9,847 10,676

9,450 9,029

17,772 19,395

18,748 19,382 19,345

18,561

17,077 16,043 15,148

13,312

6,000

8,000

10,000

12,000

14,000

0

5,000

10,000

15,000

20,000

25,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days NYS


2017 NYC Leak Repairs = 2017 NYC Leak Receipts = 2017 NYC Leak Backlogs =


11


6,116

7,878

7,173 6,956

5,091 5,606

6,240

7,970

6,100

7,018

9,103

10,441

8,773 8,747

6,608 6,658

7,563 8,072

6,632

9,411

11,695 11,626 11,422

11,788

11,108 11,298

13,715

8,608 8,517 8,253

0

1000

2000

3000

4000

5000

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days BGC


2017 BGC Leak Repairs = 2017 BGC Leak Receipts = 2017 BGC Leak Backlogs =


12


494

740

442

412

422 375 390 387

339 325

638

920

564 492 522

480 496 495

311 288

621 564

525

370

430 463

414

156 177

201

0

3000

6000

0

500

1,000

1,500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days CCC


2017 CCC Leak Repairs = 2017 CCC Leak Receipts = 2017 CCC Leak Backlogs =


13


327 352

356

251

231

190

294

376

260 233

374

450

464

300

265

225

280

407

243

276

158

201 210 208

238

203

239 227

276 270

0

3000

6000

100

200

300

400

500

600

700

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days EGC


2017 EGC Leak Repairs = 2017 EGC Leak Receipts = 2017 EGC Leak Backlogs =


14


381

510 413

327 235 253

324

592

302

329

415

517

391 338

244

239

277

432

242

355

657

750

887

781

679

627

563

629 606

578

0

3000

6000

0

100

200

300

400

500

600

700

800

900

1,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days CLW


2017 CLW Leak Repairs = 2017 CLW Leak Receipts = 2017 CLW Leak Backlogs =


15


7,318

9,480

8,384 7,946

5,979 6,424

7,248

9,325

7,001

7,905

10,530

12,328

10,192 9,877

7,639 7,602

8,616

9,406

7,428

10,330

13,131 13,141 13,044 13,147 12,455 12,591

14,931

9,620 9,576

9,302

0

3,000

6,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days MA


2017 MA Leak Repairs = 2017 MA Leak Receipts = 2017 MA Leak Backlogs =


16


3,134

3,652

2,624 2,502 2,417 2,252

2,753

2,183 1,541 1,924

3,056

3,647

2,439 2,268

2,097

1,789 1,961

1,173 1,245

1,519

2,916

2,690

2,752 2,874

3,042

3,332 3,125

3,281

3,116

2,753

0

3,000

6,000

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

HD

D

Nu

mb

er o

f L

eak

s

Leak Receipts Leak Repairs Total Open Leaks Heating Degree Days RI


2017 RI Leak Repairs = 2017 RI Leak Receipts = 2017 RI Leak Backlogs =


17

New York City (KEDNY)

• Leak receipts decreased.

• Workable leak backlog decreased.

• Leak prone main and service inventories continue to decline steadily.

• Overall main leak rate increased, whereas steel main corrosion leak remained steady and Cast Iron Main break rate is decreased

• Service leak rate increased slightly .

Long Island (KEDLI)




• Overall main leak rate increased slightly. Steel main corrosion leak rate decreased and Cast iron main break rate increased.

• Service leak rate decreased.

Upstate NY (NMPC)


• Workable leak backlog slightly increased.


• Overall main leak rate deceased. Steel main corrosion leak remained steady and Cast iron main break rate slightly increased.




18

Boston (BGC)

• Leak receipts increased.

• Workable leak backlog slightly increased.

• Leak prone main inventories continue to decline steadily.

• Overall main leak rate decreased. Steel main corrosion leak rate slight increased. Cast iron main break rate decreased.

• Service leak rate increased slightly.

Essex (EGC)




• Overall main leak rate decreased. Steel main corrosion leak rate and Cast iron main break rate both decreased.


Colonial – Cape Cod (CCC)


• Workable leak backlog remained the same.


• Overall main leak rate increased slightly. Steel main corrosion leak rate decreased.




19

Colonial – Lowell (CLW)

• Leak receipts increased slightly.


• Leak prone main and service inventories decreased.

• Overall main leak rate increased slightly. Steel main corrosion leak rate and Cast iron main break rate both increased slightly.


Rhode Island (RI)

• Leak receipts increased.

• Workable leak backlog increased.


• Overall main leak rate, Cast iron main break rate, and Steel main corrosion rate decreased.

• Service leak rate increased.



20

LEAK

MANAGEMENT

ANALYSIS

(Mains & Services)


TOTAL LEAK RECEIPTS RATE

21

0.32 0.31

0.28

0.38 0.38 0.37

0.55

0.65

0.48 0.45

0.37

0.41

0.31 0.32 0.27

0.24

0.23 0.27

0.30

0.22

0.11 0.11 0.11 0.10 0.08 0.08

0.11 0.13

0.10 0.10

0.25 0.27

0.22 0.24

0.22 0.20

0.25

0.30

0.23 0.22

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Lea

k R

eceip

ts R

ate

Year

NYC

LI

Upstate

NY State

INCLUDES ALL TYPE 1, 2A, 2 and 3 LEAKS DISCOVERED - EXCLUDING DAMAGES

NYS



22

0.64

0.82

0.71

0.67

0.48

0.53

0.58

0.74

0.57

0.65

0.23 0.26

0.24

0.17 0.16 0.13

0.20

0.25

0.17 0.15

0.04 0.04 0.12 0.10 0.11

0.09 0.10 0.09 0.08 0.08

0.22

0.27

0.19 0.14

0.10

0.11

0.13

0.24

0.12 0.13

0.42

0.54

0.48

0.44

0.33 0.35

0.39

0.49

0.37

0.42

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Lea

k R

eceip

ts R

ate

Year

BGC

EGC

CAPE

LOWELL

MA


MA



23

0.57

0.66

0.47 0.45 0.43 0.40

0.49

0.42

0.35

0.29

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Lea

k R

eceip

ts R

ate

Year

RI

INCLUDES ALL TYPE 1, 2A, 2 and 3 LEAKS DISCOVERED - EXCLUDING DAMAGES RI



24

0.25 0.27

0.22

0.24 0.22

0.20

0.25

0.30

0.23 0.22

0.42

0.54

0.48

0.44

0.33

0.35

0.39

0.49

0.37 0.42

0.57

0.66

0.47

0.45 0.43

0.40

0.49

0.42

0.35 0.29

0.33

0.37

0.31 0.31

0.27 0.26

0.31

0.36

0.28

0.28

0.19

0.29

0.39

0.49

0.59

0.69

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Lea

k R

eceip

ts R

ate

Year

NY

MA

RI

US-Ngrid



25

2008 - 2017 LEAK RECEIPTS

By Discovery Source (Excluding Damages)

3,0

13

3,7

36

2,2

60

2,4

84

1,7

13

1,7

38

1,1

40

1,5

75

1,3

50

1,6

54

2,1

82

2,1

01

2,0

87

2,0

32

2,1

99

1,7

89

2,2

10

2,3

60

2,0

30

2,2

55

0

2,000

4,000

6,000

Nu

mb

er

of

Leaks

LONG ISLAND

Company

Public

80

7

78

4

74

6

12

33

12

62

12

45

12

59

11

01

12

02

10

43

1,9

75

1,9

63

1,7

80

2,1

37

2,1

21

2,0

87

3,7

25

4,7

11

3,1

38

3,3

13

0

2,000

4,000

6,000

Nu

mb

er

of

Le

ak

s

NEW YORK CITY

Company

Public

14

87

13

64

14

53

14

76

10

86

10

58

10

85

16

33

11

06

12

89

21

3

34

4

31

4

17

7

12

7

14

7

71

5

48

9

53

3

34

4

0

2,000

Nu

mb

er

of

Le

ak

s

UPSTATE

Company

Public

5,3

07

5,8

84

4,4

59

5,1

93

4,0

61

4,0

41

3,4

84

4,3

09

3,6

58

3,9

86

4,3

70

4,4

08

4,1

81

4,3

46

4,4

47

4,0

23

6,6

50

7,5

60

5,7

01

5,9

12

0

2,000

4,000

6,000

8,000

10,000

Nu

mb

er

of

Le

aks

NEW YORK STATE

Company

Public


26


By Discovery Source (Excluding damages)

18

7

28

0 2

35

23

0

13

1 2

10

18

2

14

9

16

1

23

0

30

7

46

0

20

7

18

2

29

1

16

5

20

8

23

8

17

8

95

0

200

400

600

Nu

mb

er

of

Leaks

CAPE COD

Company

Public

33

06

43

62

39

20

40

00

27

36

34

15

36

09

48

89

39

30

49

76

2,8

10

3,5

16

3,2

53

2,9

56

2,3

55

2,1

91

2,6

31

3,0

81

2,1

70

2,0

42

0

1,000

2,000

3,000

4,000

5,000

6,000

Nu

mb

er

of

Le

ak

s

BOSTON

Company

Public

15

5

98

14

9

10

2

14

7

88

17

8

26

5

18

1

16

6

17

2

25

4

20

7

14

9

84

10

2

11

6

11

1

79

67

0

200

400

600

Nu

mb

er

of

Le

ak

s

ESSEX

Company

Public

18

0 23

8

25

1

16

5

97

11

1

17

4

48

1

18

4

19

3

20

1 2

72

16

2

16

2

13

8

14

2

15

0

11

1

11

8

13

6

0

200

400

600

Nu

mb

er

of

Le

aks

LOWELL

Company

Public


27



3,8

12

4,9

65

4,5

36

4,4

87

3,1

11

3,8

24

4,1

43

5,7

84

4,4

56

5,5

65

3,5

06

4,5

15

3,8

48

3,4

59

2,8

68

2,6

00

3,1

05

3,5

41

2,5

45

2,3

40

0

2,000

4,000

6,000

8,000

10,000

Nu

mb

er

of

Leaks

MASSACHUSETTS

Company

Public

5,8

99

5,3

07

5,8

84

4,4

59

5,1

93

4,0

61

4,0

41

43

09

4,3

09

4,6

72

4,3

70

4,4

08

4,1

81

4,3

46

4,4

47

4,0

23

6,6

50

7,5

60

5,7

01

5,9

12

0

2,000

4,000

6,000

8,000

10,000

Nu

mb

er

of

Le

ak

s

NEW YORK STATE

Company

Public

1,9

65

2,5

40

2,5

10

1,5

78

1,5

59

1,4

22

1,2

38

1,7

30

1,1

02

1,5

72

59

4

1,1

42

1,0

46

94

3

99

5

1,0

14

1,0

23

21

7

29

4

31

5

0

2,000

4,000

6,000

8,000

Nu

mb

er

of

Le

ak

s

Rhode Island

Company

Public

12

,23

0

13

,87

2

10

,97

8

11

,52

4

8,5

94

9,1

03

9,3

57

11

,19

5

9,6

86

10

,90

9

7,9

43

9,5

52

8,6

70

8,4

63

8,3

10

7,6

37

10

,77

8

12

,28

4

8,6

38

8,5

96

0

4,000

8,000

12,000

16,000

20,000

Nu

mb

er

of

Le

aks

US- National Grid

Company

Public


1,991 1,858 1,781 2,361 2,318 2,241

3,426 4,048

2,901 2,852

176 140 136

182 170 204

305

314

222 200

161 210 161

144 179 208

290

287

217 218

454 539 448

683 716 679

963

1,163

1,000 805

2,782 2,747 2,526

3,370 3,383 3,332

4,984

5,812

4,340 4,075

0

2,000

4,000

6,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

LEAK RECEIPTS By ORIGINAL Type

28

NYC (Excluding Damages)

Total Leaks Trendline


934 949 891 1,031 1,053 983 999 979 869 811

309 255 239 289 250 228 281 340

275 297

942 921 698

723 678 647 625 751 742 693

3,010 3,712

2,519 2,473

1,931 1,669 1,445

1,865

1,494 1,491

5,195

5,837

4,347 4,516

3,912 3,527

3,350

3,935

3,380 3,292

0

2,000

4,000

6,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


29

LI (Excluding Damages)



482 448 557 476

316 338

642

883

537 472

246 176

278 241

142 110

143

174

130 166

454 495

459

423

273 277

342

406

379 410

518 589

473

513

482 480

673

659

593 585

1,700 1,708 1,767 1,653

1,213 1,205

1,800

2,122

1,639 1,633

0

500

1,000

1,500

2,000

2,500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


30

UPSTATE (Excluding Damages)



3,407 3,255 3,229 3,868 3,687 3,562

5,067 5,910

4,307 4,135

731 571 653

712 562 542

729

828

627 663 1,557

1,626 1,318

1,290 1,130 1,132

1,257

1,444

1,338 1,321

3,982 4,840

3,440

3,669

3,129 2,828

3,081

3,687

3,087 2,881

9,677 10,292

8,640

9,539

8,508 8,064

10,134

11,869

9,359 9,000

0

3,000

6,000

9,000

12,000

15,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


31

NY State (Excluding Damages)



2,688 3,504 3,314 3,236

2,524 2,827 3,039 3,840

2,842 3,573

484

478 499 433

321 390

463

602

451

452 1,979

2,291

1,624 1,549

1,221

1,395 1,656

1,845

1,287

1,442

965

1,605

1,736 1,738

1,025

994

1,082

1,683

1,520

1,551 6,116

7,878 7,173

6,956

5,091

5,606

6,240

7,970

6,100

7,018

0

2,000

4,000

6,000

8,000

10,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


32

BGC (Excluding Damages)



110 117 156

107 111 92 93

188

106 120

12 10

13

10 17

6 17

27

13 12

116 130

96

61 35

40

82

75

47 36

89

95 91

73 68

52

102

86

94 65

327

352 356

251 231

190

294

376

260 233

0

100

200

300

400

500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


33

EGC (Excluding Damages)



288

430

219 198

305 274 256 252 248 241

32

47

34 30

41

23 24 20 16 4

109

193

126

103

44

56 52 50

24 20

65

70

63

81 32

22 58 65

51 60

494

740

442 412 422

375 390 387

339 325

0

200

400

600

800

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


34

CAPE (Excluding Damages)



143

216 151 131 131 124 137

211 151 159

22

24

13 6 6 4

13

39

14 15 62

89

47 61

21 34 43

97

19 45

154

181

202

129

77 91

131

245

118 110

381

510

413

327

235 253

324

592

302 329

0

200

400

600

800

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


35

LOWELL (Excluding Damages)



3,229

4,267 3,840 3,672

3,071 3,317 3,525 4,491

3,347 4,093

550

559 559

479

385 423

517

688

494

483

2,266

2,703

1,893 1,774

1,321 1,525

1,833

2,067

1,377

1,543

1,273

1,951

2,092 2,021

1,202 1,159

1,373

2,079

1,783

1,786

7,318

9,480

8,384 7,946

5,979 6,424

7,248

9,325

7,001 7,905

0

3,000

6,000

9,000

12,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


36

MA (Excluding Damages)



1,142 1,511

1,074 1,005 792 922

1,150 864

644 724

155

227

120 135 154

79

89

80

72 83

862

887

573 503

512 370

577

401

331 459

975

1,027

857 859

959 881

937

838

494

658

3,134

3,652

2,624 2,502

2,417 2,252

2,753

2,183

1,541

1,924

0

2,000

4,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


37

RI (Excluding Damages)



7,778 9,033 8,143 8,545 7,550 7,801

9,742 11,433

8,446 8,952

1,436 1,357

1,332 1,326 1,101 1,044

1,335

1,611

1,251 1,229

4,685

5,216

3,784 3,567

2,963 3,027

3,667

3,946

3,127 3,323

6,274

7,818

6,389 6,549

5,290 4,868

5,391

6,611

5,500 5,325

20,173

23,424

19,648 19,987

16,904 16,740

20,135

23,601

18,324 18,829

0

5,000

10,000

15,000

20,000

25,000

30,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


38

US NGrid (Excluding Damages)



2,236 1,965 2,005

2,694

1,963

2,478

3,915 3,916

3,240 3,670

152

146 170

246

218

228

328 249

400

187

327 437 368

349

237

339

427 339

492 366

305 252 190

181

123

178

253 209

324 427

3,020 2,800 2,733

3,470

2,541

3,223

4,923 4,713

4,456 4,650

0

1,000

2,000

3,000

4,000

5,000

6,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

39

NYC (Including Damages)

LEAKS REPAIRED By REPAIRED Type



1,391 1,349 1,350 1,570 1,604 1,481 1,449 1,491

1,293 1,193

257 274 256

322 250 259 370 393

334 342

1,173 1,140 1,065

1,115 983

855 1,013 966

993 879

418 286 324

304 263

249

235 234 621

511

3,239 3,049 2,995

3,311

3,100 2,844

3,067 3,084 3,241

2,925

0

1,000

2,000

3,000

4,000

5,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

40

LI LEAKS REPAIRED

By REPAIRED Type

(Including Damages)



850 890 877 759 634 657 891

1,220 804 705

230 220 276 234

140 132

151

152

131 129

435 623 549

467

336 346

373

499

378 338

280

338 262

339

364 363

442

1,008

440

282

1,795

2,071 1,964 1,799

1,474 1,498

1,857

2,879

1,753

1,454

0

1,000

2,000

3,000

4,000

5,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

41

UPSTATE LEAKS REPAIRED

By REPAIRED Type

(Including Damages)



4,477 4,204 4,232 5,023

4,201 4,616

6,255 6,627

5,337 5,568

639 640 702

802

608 619

849 794

865 658 1,935

2,200 1,982

1,931

1,556 1,540

1,813 1,804

1,863 1,583 1,003 876 776

824

750 790

930 1,451

1,385 1,220

8,054 7,920 7,692 8,580

7,115 7,565

9,847 10,676

9,450 9,029

0

3,000

6,000

9,000

12,000

15,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

42

NY State LEAKS REPAIRED

By REPAIRED Type

(Including Damages)



3,959 5,223 4,925 5,042

3,667 3,675 4,213

4,803 3,759

5,065

885

791 748 697

473 561 739

697

688

829

3,718

3,669

2,490 2,495

1,988 2,088

2,327 2,231

2,192

3,194

541

758

610 513

480 334

284 341

432

668 9,103

10,441

8,773 8,747

6,608 6,658

7,563 8,072

7,071

9,756

0

3,000

6,000

9,000

12,000

15,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

43

BGC LEAKS REPAIRED

By REPAIRED Type

(Including Damages)



141 143

226

158 157 133 126

232

144 173

15 12

23

12 7 16 18

29

21

20

149

190

129

87 73

52

105

111

68

60

69

105

86

43

28

24

31

35

33

61

374

450 464

300

265

225

280

407

266

314

0

100

200

300

400

500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

44

EGC LEAKS REPAIRED

By REPAIRED Type

(Including Damages)



411

553

349 328 400 384 387 382 376 349

53

76

45 40

41 30 37 36 17

6

160

275

167

122

77 61 68 66

56

36

14

16

3

2

4

5 4 11

0 16

638

920

564

492 522

480 496 495 449

407

0

200

400

600

800

1000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

45

CAPE LEAKS REPAIRED

By REPAIRED Type

(Including Damages)



247 295

229 194

159 158 175 255

194 223

31

34

16 11

8 4 14

33

20 19

74

125

75 80

33 40 53

109

32

101

63

63

71 53

44 37 35

35

39

74

415

517

391

338

244 239 277

432

285

417

0

200

400

600

800

1000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

46

LOWELL LEAKS REPAIRED

By REPAIRED Type

(Including Damages)



4,758

6,214 5,729 5,722

4,383 4,350 4,901

5,672 4,473

5,810

984

913 832 760

529 611

808

795

746

873

4,101

4,259

2,861 2,784

2,171 2,241

2,553

2,517

2,348

3,391

687

942

770 611

556 400

354

422

504

819

10,530

12,328

10,192 9,877

7,639 7,602

8,616

9,406

8,071

10,894

0

3,000

6,000

9,000

12,000

15,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

47

MA LEAKS REPAIRED

By REPAIRED Type

(Including Damages)


2017


48

RI LEAKS REPAIRED

By REPAIRED Type

(Including Damages)

1,267 1,506

1,240 1,113 921

1,087 1,201 991

756 812

172

246

179 171

172 68

160

49

106 99

1,275

1,442

860

702

651 383

590

244 469 588

483

481

300

407

486

286

162

24 21

24

3,197

3,675

2,579

2,393 2,230

1,824 2,113

1,308 1,352

1,523

0

1,000

2,000

3,000

4,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1



49

US NGrid LEAKS REPAIRED

By REPAIRED Type

(Including Damages)

12,182 10,502

11,924 11,201 11,858 9,505 10,053

12,357 13,290 10,566

12,191

1,589

1,795

1,799 1,713

1,733

1,309 1,298

1,817 1,638

1,717

1,630

7,010

7,311

7,901

5,703 5,417

4,378 4,164

4,956 4,565

4,680

5,562

2,374 2,173

2,299

1,846 1,842

1,792 1,476

1,446 1,897

1,910

2,063

23,155

21,781

23,923

20,463 20,850

16,984 16,991

20,576 21,390

18,873

21,446

0

7,000

14,000

21,000

28,000

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1



YEAR-END WORKABLE LEAK BACKLOGS

50

NYS 72

67

29

21

25

13

8

5

1 0

70

51

17

6

25

7

24 21

23

8

7

17

1

3 4

0

5

17 21

9

0

10

20

30

40

50

60

70

80

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

LI

NYC

Upstate



51

MA

194

172

197 205

157

170

212

226

181

193

0 6

0 0 1 1 0 0 1 1 1 0 0 0 2 3 0

3 1 0 1 0 0 0 1 2 0 0 2 1

0

50

100

150

200

250

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

BGC

Cape

Lowell

EGC



52

RI

264

77

15 33 54

26 38 49 68 74

0

300

600

900

1200

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

RI



53

US NGrid

149 135

47 30

54

20 37 43 45 17

196 178

197 205

161 176

212 229

185

195

264

77

15 33 54

26 38 49

68 74

609

390

259 268 269

222

287

321 298

286

0

100

200

300

400

500

600

700

800

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

NY

MA

RI

US-NGrid


54

NYS

12,466

13,873 13,948 13,944 13,450

12,423

11,486 11,325

10,555

9,232

3,836 3,784

2,944 3,676

4,166 4,468 4,044 3,799 3,653

3,110

1,321 1,603

1,809

1,732 1,675 1,650 1,547 919 940 970

17,623

19,260 18,701

19,352 19,291 18,541

17,077

16,043 15,148

13,312

0

4,000

8,000

12,000

16,000

20,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

LI

NYC

Upstate

NY State

YEAR-END OPEN TYPE 3


55

MA

11,501 11,454 11,225 11,583

10,951 11,128

10,125

8,382 8,336 8,060

621 558 525 370 429 462 414 156 176 200

656 750 887 781 677 624 563 629 605 578

157 201 230 208 237

201 239 227 274 269

12,935 12,963 12,867 12,942

12,294 12,415

11,341

9,394 9,391

9,107

0

3,000

6,000

9,000

12,000

15,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

BGC

Cape

Lowell

EGC

MA



56

RI

2,652 2,613 2,737

2,841 2,988

3,306 3,087

3,232 3,048

2,692

0

1,000

2,000

3,000

4,000

5,000

6,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

RI



57

US NGrid

17,623

19,260 18,701 19,352 19,291

18,541 17,077

16,043 15,148

13,312

12,935 12,963 12,867 12,942 12,294 12,415

11,341

9,394 9,391 9,107

2,652 2,613 2,737 2,841 2,988 3,306 3,087 3,232 3,048 2,692

33,210 34,836 34,305

35,135 34,573 34,262

31,505

28,669 27,587

25,111

0

8,000

16,000

24,000

32,000

40,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Year

NY

MA

RI

US-NGrid



58

PHMSA Reported

Incidents Cost


59

The objective of this section is to identify potential threats to the gas distribution pipeline. The

following categories of threats are considered for each gas distribution pipeline:

CORROSION - Used when gas is leaking from a hole, crack or porosity in the pipe or other gas-

carrying member and that condition was caused by corrosion (or graphitization for cast iron).

NATURAL FORCES - Used when the leak is directly caused by undermining, earth movement,

lightning, floods, washouts, frost heave, frozen components, etc.

EXCAVATION DAMAGE - Used when the leak is directly caused by current or previous physical

damage (impact) that can be attributed to someone.

OTHER OUTSIDE FORCE - Used only when the leak is directly caused by fire, explosion, electric

burn-throughs or a deliberate/willful act such as vandalism. Damage from vehicle or vessels not

engaged in excavation.

PIPE, WELD OR JOINT FAILURE - Used for leaks occurring on faulty material; such as faulty

bends, joint due to faulty manufacturing, faulty field welds/fuses or material damaged in transportation

or during installation.

EQUIPMENT FAILURE - Used for leaks caused by malfunction of control/relief equipment (including

valves, regulators or other instrumentation); stripped threads or broken pipe, couplings on nipples,

valves or mechanical couplings; seal failures on gaskets; O-rings or seal/pump packing.

INCORRECT OPERATION - used for a leak caused by operator error, inadequate safety

practices/procedures or failure to follow procedures.

Other - Used for leaks that are the result of deterioration (NOT corrosion) such as Cast Iron Joint

leaks, exceeding the normal service life or any other cause not covered above.


TOTAL PROPERTY DAMAGES

60

NYS PHMSA Incident data from 2010 to 2017



61

MA PHMSA Incident data from 2010 to 2017



62

PHMSA Incident data from 2010 to 2017 RI



63

PHMSA Incident data from 2010 to 2017 NGrid


64

MAIN

INVENTORY

ANALYSIS


-

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

65

NYC

Note: See main breakdown in Appendix

MAIN INVENTORY

TREND (MILES)

Average Age

Of All NYC

Distribution Main:

49.94 Years


-

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

66

LI Average Age

Of All LI

Distribution Main:

39.69 Years

MAIN INVENTORY

TREND (MILES)



-

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

67

UPSTATE Average Age

Of All Upstate

Distribution Main:

39.07 Years

MAIN INVENTORY

TREND (MILES)



-

2,000

4,000

6,000

8,000

10,000

12,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

68

NY STATE Average Age

Of All NY State

Distribution Main:

41.48 Years

MAIN INVENTORY

TREND (MILES)



-

500

1,000

1,500

2,000

2,500

3,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

Recond. Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

69

BGC Average Age

Of All BGC

Distribution Main:

52.01 Years

MAIN INVENTORY

TREND (MILES)



-

50

100

150

200

250

300

350

400

450

500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

70

EGC MAIN INVENTORY

TREND (MILES)

Average Age

Of All EGC

Distribution Main:

37.20 Years



-

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

PROTECTED STEEL

UNPROT’D STEEL

71

CAPE MAIN INVENTORY

TREND (MILES)

Average Age

Of All Cape

Distribution Main:

28.41 Years



-

100

200

300

400

500

600

700

800

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

72

LOWELL MAIN INVENTORY

TREND (MILES)

Average Age

Of All Lowell

Distribution Main:

36.62 Years



-

1,000

2,000

3,000

4,000

5,000

6,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

Recond. Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

73

MA MAIN INVENTORY

TREND (MILES)

Average Age

Of All MA

Distribution Main:

43.66 Years



-

200

400

600

800

1,000

1,200

1,400

1,600

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Ductile Iron

74

RI MAIN INVENTORY

TREND (MILES)

Average Age

Of All RI

Distribution Main:

44.48 Years



-

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

Recond. Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

Ductile Iron

75

US-NGrid MAIN INVENTORY

TREND (MILES)

Average Age

Of All US-NGrid

Distribution Main:

42.44 Years



76

PROT'D

STEEL

1,147

14%

UNPROT'D

STEEL

3,013

37%

CAST

IRON

261

3%

PLASTIC

3,763

46%

New York City Long Island

Upstate All New York State

NEW YORK

MAIN INVENTORY

4,141 MILES 8,184 MILES

8,783 MILES 21,108 MILES PROT'D

STEEL

5,804

27%

UNPROT'D

STEEL

3,549

17%

CAST

IRON

2,024

10%

PLASTIC

9,731

46%

PROT'D

STEEL

1,135

27%

UNPROT'D

STEEL

324

8%

CAST

IRON

1,357

33%

PLASTIC

1,325

32%

PROT'D

STEEL

3,522

40%

UNPROT'D

STEEL

212

2%

CAST

IRON

406

5%

PLASTIC

4,643

53%


PROT'D

STEEL

690

28%

UNPROT'D

STEEL

48

2%

CAST

IRON

0

0%

PLASTIC

1738

70%

77

PROT'D

STEEL

526

38%

UNPROT'D

STEEL

66

5%

CAST

IRON

90

6%

PLASTIC

716

51%

PROT'D

STEEL

331

38%

UNPROT'D

STEEL

18

2%

CAST

IRON

73

8%

PLASTIC

444

51%

PROT'D

STEEL

974

15%

UNPROT'D

STEEL

1,087

17% CAST

IRON

1,768

28%

PLASTIC

2,533

40%

OTHER

5

0%

PROT'D

STEEL

2,520

23%

UNPROT'D

STEEL

1,219

11%

CAST

IRON

1,930

17%

PLASTIC

5,431

49%

OTHER

5

0%

BGC Colonial Cape 6,367 MILES

2,475 MILES

EGC 866 MILES

All Massachusetts State 11,105 MILES

Colonial Lowell 1,397 MILES

MASSACHUSETTS

MAIN INVENTORY


78

PROT'D

STEEL

590

18%

UNPROT'D

STEEL

395

12%

CAST

IRON

745

23%

PLASTIC

1,476

46%

Rhode Island 3,205 MILES

RI

MAIN INVENTORY


79

PROT'D

STEEL

2,520

23%

UNPROT'D

STEEL

1,219

11%

CAST

IRON

1,930

17%

PLASTIC

5,431

49%

OTHER

5

0%

MA

National Grid-US

11,105 MILES

35,419 MILES

NY 21,108 MILES

Rhode Island 3,205 MILES

SUMMARY – All States

MAIN INVENTORY

PROT'D

STEEL

5,804

27%

UNPROT'D

STEEL

3,549

17%

CAST

IRON

2,024

10%

PLASTIC

9,731

46%

PROT'D

STEEL

590

19%

UNPROT'D

STEEL

395

12%

CAST

IRON

745

23%

PLASTIC

1476

46%

PROT'D

STEEL

8,913

25%

UNPROT'D

STEEL

5,163

15%

CAST

IRON

4,699

13%

OTHER

5

0%

PLASTIC

16,638

47%


80

National Grid - US

35,419 MILES

2017 MAIN INVENTORY

U.S. COMPARATIVE SUMMARY

PROT'D

STEEL

1,844

37%

UNPROT'D

STEEL

219

4%

CAST

IRON

95

2%

PLASTIC

2,755

56%

OTHER

8

0%

2017 PHMSA Average 237 Companies with 500+ miles

Excluding National Grid miles of main

4,921 MILES

PROT'D

STEEL

8,913

25%

UNPROT'

D STEEL

5,163

15%

CAST

IRON

4,699

13%

OTHER

5

0% PLASTIC

16,638

47%


National Grid Gas Distribution System Average Age of Main by Legacy NG Company Reflects Expected

Northeast Pattern( i.e., old civilization areas and cast iron)

56.8 56.8 56.4 56.6 56.9 56.9 56.8 57.0

50.8 49.9

41.7 41.4 41.5 41.8 42.2 42.4 42.6 42.8 41.4

39.7

33.9

35.7 36.3

36.9 37.4 37.8 38.2 38.7 38.9 39.1

20

30

40

50

60

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Aver

age

Age

YEAR

Average Main System Age

NYC

LI

UPSTATE

81




55.8 55.7 55.5 55.3 54.8 54.4 53.7 53.4 53.0

52.0

34.9 35.3 35.9 36.1 36.2 36.3 36.1 36.2 36.7

36.6

31.6 32.4

33.2 33.9

34.5 35.1 35.6 36.1 36.6

37.2

27.5 28.3

28.9 28.7 28.1 28.2 28.0 28.4 28.5 28.4

20

30

40

50

60

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Aver

age

Age

YEAR


BGC

LOWELL

EGC

CAPE

82




45.0 45.5 45.7

43.4

46.7 46.4 45.9 45.1 45.0 44.5

20

30

40

50

60

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Aver

age

Age

YEAR


RI

83


84

NATIONAL GRID MAIN REPLACEMENT

1. Leaks per mile of total main excludes Excavation leaks.

2. Leaks per mile of Leak-Prone main (LPP) excludes Excavation leaks and Plastic leaks.

3. Leak-Prone Pipe = Unprotected steel (Bare & Coated) + CI/WI + Aldyl-A (MD, 1985 and prior) + Other.

4. Miles of Leak-Prone main replaced includes all Proactive programs ( Main Replacement program & System Reinforcement) and all

Reactive programs (Public Works, Water Intrusion & Leak/reactive).

5. Annual planned and actual replacement miles are CY.

6. Data sources are 2016 & 2017 US Gas Leak Prone Pipe Replacement Programs monthly reports from Gas Resource Management CMS.

Note:

Rate Case Supported “Leak-Prone” Main Replacement Levels

Region

2017 Total

Main (Miles)

2017 Leak

Prone Main

(Miles)

Leaks/Miles of

Total Main

(Repair rate)

Leaks/Miles of

Leak Prone

Main (Repair

rate)

(5)2017 Annual

"Planned"

Replacement

(Miles)

Planned

Replacement %

of Leak prone

system

(5)2017 Annual

"Actual"

Replacement

(Miles)

Actual

Replacement %

of Leak prone

system

(5)2018 Annual

"Planned"

Replacement

(Miles)

Years to LPP

Main

Elimination

based on

"Current"

annual plan

NYC 4,141 1,681 0.77 1.85 55.0 3.3% 57.1 3.4% 58.0 18

LI 8,184 3,274 0.12 0.28 115.0 3.5% 115.9 3.5% 135.0 18

Upstate NY 8,783 618 0.06 0.72 52.6 8.5% 53.8 8.7% 50.0 13

RI 3,205 1,124 0.26 0.73 53.7 4.8% 53.6 4.8% 60.0 18

BGC & EGC 7,233 2,946 0.98 2.16 116.0 3.9% 121.2 4.1% 115.0 22

CCC & CLW 3,872 203 0.07 0.84 43.0 21.1% 44.7 22.0% 40.0 9


85

MAIN LEAK

REPAIR

ANALYSIS


2,280 2,101

2,016

2,589

1,839

2,006

3,138 2,980

3,174 3,238

1,270 1,180 1,166

1,313

1,035 964

1,142

1,210

1,298

1,091

715

917 783 763

567 602

783

1,473

701 529

0

500

1000

1500

2000

2500

3000

3500

'08 '09 '10 '11 '12 '13 '14 '15 16 17

MAIN

LEAK

REPAIRS

YEAR

NYC

LI

UPSTATE

86

TOTAL MAIN LEAK REPAIRS

NOTE: Cast Iron Leak Count Total Individual Joint Repairs

INCLUDING Damages


6,342

7,644

5,764

5,941

4,360 4,224

5,059

5,488

4,456

6,917

171 229 217

126 138 105 148 212 133 140

405 571

299 249 224 162 148 182 99 86

165 237 144 168 109 101 116 201 87 186 0

1000

2000

3000

4000

5000

6000

7000

8000

9000

'08 '09 '10 '11 '12 '13 '14 '15 '16 17

MAIN

LEAK

REPAIRS

YEAR

BGC

EGC

Cape

Lowell

87


NOTE: Cast Iron Leaks Count Total Individual Joint Repairs

INCLUDING Damages


2,517 2,656

1,871 1,716 1,663

1,102 1,216

744 751 869

0

2000

4000

6000

8000

10000

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

MAIN

LEAK

REPAIRS

YEAR

RI

88



INCLUDING Damages


89

4,265 4,198 3,965 4,665

3,441

3,572

5,063 5,663

5,173

4,858

7,083

8,681

6,424 6,484

4,831 4,592

5,471 6,083

4,775

7,329

2,517 2,656

1,871 1,716 1,663 1,102 1,216

744 751 869

13,865

15,535

12,260

12,865

9,935 9,266

11,750 12,490

10,699

13,056

0

4000

8000

12000

16000

20000

'08 '09 '10 '11 '12 '13 '14 '15 '16 17

MAIN

LEAK

REPAIRS

YEAR

NY State

MA

RI

US - NGrid



INCLUDING Damages


PROT'D

STEEL

27%

UNPROT'D

STEEL

8%

CAST

IRON

33%

PLASTIC

32%

90

CAST

IRON

92%

PLASTIC

1%

ALL

STEEL

7%

TOTAL MAIN INVENTORY

BY MATERIAL


BY MATERIAL

NYC

3,238 LEAKS (including damages) 4,141 MILES

NOTE: Each Repair is Counted as an Individual Leak.


COMPARED TO

LEAK REPAIRS


PROT'D

STEEL

14%

UNPROT'D

STEEL

37% CAST IRON

3%

PLASTIC

46%

91

CAST

IRON

20%

PLASTIC

12% ALL

STEEL

69%


BY MATERIAL


BY MATERIAL

LI

8,184 MILES 1,091 LEAKS (including damages)



COMPARED TO

LEAK REPAIRS


92


BY MATERIAL


BY MATERIAL

CAST

IRON

71% PLASTIC

8%

ALL

STEEL

21%

UPSTATE

701 LEAKS (including damages) 8,783 MILES



COMPARED TO

LEAK REPAIRS

PROT'D

STEEL

40%

UNPROT'D

STEEL

2% CAST IRON

5%

PLASTIC

53%


PROT'D

STEEL

27%

UNPROT'D

STEEL

17% CAST

IRON

10%

PLASTIC

46%

93

CAST

IRON

69%

PLASTIC

4%

ALL

STEEL

26%


BY MATERIAL


BY MATERIAL

NY State




COMPARED TO

LEAK REPAIRS


PROT'D

STEEL

15%

UNPROT'D

STEEL

17% CAST IRON

28%

PLASTIC

40%

94

CAST

IRON *

78% PLASTIC

2%

ALL

STEEL

20%


BY MATERIAL


BY MATERIAL

BGC


NOTE: (*) CI Leaks include WI & Other material Leaks.

Each Repair is Counted as an Individual Leak.


COMPARED TO

LEAK REPAIRS


PROT'D

STEEL

38%

UNPROT'D

STEEL

2%

CAST

IRON

9%

PLASTIC

51%

95

CAST

IRON *

73% PLASTIC

4%

ALL

STEEL

23%


BY MATERIAL


BY MATERIAL

EGC TOTAL MAIN INVENTORY

COMPARED TO

LEAK REPAIRS

140 LEAKS (including damages) 866 MILES

NOTE: (*) CI Leaks include WI material Leaks.

Leak Count Totals Individual Repairs.


PROT'D

STEEL

28%

UNPROT'D

STEEL

2% CAST IRON

0%

PLASTIC

70%

96

CAST

IRON

0%

PLASTIC

16%

ALL

STEEL

84%


BY MATERIAL


BY MATERIAL

Cape


NOTE: Leak Count Totals Individual Repairs


COMPARED TO

LEAK REPAIRS


PROT'D

STEEL

38%

UNPROT'D

STEEL

5% CAST

IRON

6%

PLASTIC

51%

97

CAST

IRON *

58%

PLASTIC

4% ALL

STEEL

37%


BY MATERIAL


BY MATERIAL

Lowell


NOTE: (*) CI Leaks include WI material Leaks.



COMPARED TO

LEAK REPAIRS


PROT'D

STEEL

23%

UNPROT'D

STEEL

11% CAST

IRON

17%

PLASTIC

49%

98

CAST

IRON *

77%

PLASTIC

3%

ALL

STEEL

23%


BY MATERIAL


BY MATERIAL

MA


NOTE: (*) CI Leaks include WI & Other material Leaks.



COMPARED TO

LEAK REPAIRS


PROT'D

STEEL

19%

UNPROT'D

STEEL

12%

CAST IRON

23%

PLASTIC

46%

ALL

STEEL

15%

CAST

IRON

83%

PLASTIC

2%

99


BY MATERIAL


BY MATERIAL

RI


NOTE: (*) CI Leaks include Other material Leaks.



COMPARED TO

LEAK REPAIRS


1,616 1,445 1,433

1,965

1,392 1,502

2,430 2,427 2,204

2,476

132

123 144

220

180 173

261 187 325

150

277 331 278

267

175 203

278 218 389 262

255 202 161

137

92 128

169 148

256 350

2,280 2,101

2,016

2,589

1,839

2,006

3,138 2,980

3,174 3,238

0

1,000

2,000

3,000

4,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1

LEAKS REPAIRED By Type

100


MAIN



355 407 381 488

392 382 425 437 315 252

130 127 132

176

107 113 185 206

152 146

505 486 465

483

403 345

404 431

436 363

280 160 188

166

133 124

128 136 395

330

1,270 1,180 1,166

1,313

1,035 964 1,142

1,210 1,298

1,091

0

1,000

2,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


101

LI (Including Damages)

MAIN



212 261 189 230

133 162 300

506

216 160

127 114

173 133

74 74

66

84

56 61

227

342 291 231

160 174

152

278

182 163

149

200 130

169

200 192

265

605

247

145

715

917

783 763

567

602 783

1,473

701

529

0

500

1,000

1,500

2,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


102

UPSTATE (Including Damages)

MAIN



2,183 2,113 2,003 2,683

1,917 2,046

3,155 3,370 2,735 2,888

389 364 449

529

361 360

512 477

533 357 1,009 1,159 1,034

981

738 722

834 927

1,007 788 684 562

479

472

425 444

562

889

898 825

4,265 4,198 3,965

4,665

3,441 3,572

5,063

5,663

5,173 4,858

0

2,000

4,000

6,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


103

NY State (Including Damages)

MAIN



2,211

3,355 2,767 2,960

2,093 1,937 2,461

2,922

1,905

2,938

687

610

542 534

312 400

567

498

502

674

2,992

3,059

1,997 2,057

1,595 1,646

1,811

1,788

1,705

2,722

452

620

458 390

360 241

220 280

344

583 6,342

7,644

5,764 5,941

4,360 4,224

5,059

5,488

4,456

6,917

0

2,000

4,000

6,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


104

BGC (Including Damages)

MAIN



37 31 62 49

72 47 50

108

52 45 5 4

16

4

2

14 7

12

16 11

89 125

81

50 49

30 71

69

45 37

40

69 58

23

15

14

20

23

20 47

171

229 217

126 138

105

148

212

133 140

0

100

200

300

400

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


105

EGC (Including Damages)

MAIN



213 249

136 116 121 96 81 92

50 59

48

70

32 32 27

19 24

29

12 4

133

240

129

100 72

43 43 50

37 15

11

12

2

1

4

4 0 11

0 8

405

571

299

249 224

162 148 182

99 86

0

100

200

300

400

500

600

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


106

CAPE (Including Damages)

MAIN



76 92

49 76

53 56 59 87

37 58

11

24

8

4

1 3 4

23

8

11

43

81

42

55

22 20 31

71

18

68

35

40

45

33

33 22

22

20

24

49

165

237

144 168

109 101

116

201

87

186

0

100

200

300

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


107

LOWELL (Including Damages)

MAIN



2,537

3,727 3,014 3,201

2,339 2,136 2,651

3,209

2,044

3,100

751

708

598 574

342 436

602

562

538

700

3,257

3,505

2,249 2,262

1,738 1,739

1,956

1,978

1,805

2,842

538

741

563 447

412 281

262

334

388

687

7,083

8,681

6,424 6,484

4,831 4,592

5,471

6,083

4,775

7,329

0

2,000

4,000

6,000

8,000

10,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


108

MA (Including Damages)

MAIN



732 661 653 578 499 544 605 514 313 324

157 219 160 142

141 47 121

32

76 69

1,189 1,330

776

626 568

278 367

176 343 461

439

446

282

370 455

233

123

22 19 15

2,517

2,656

1,871

1,716 1,663

1,102 1,216

744 751 869

0

1,000

2,000

3,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


109

RI (Including Damages)

MAIN



5,452 6,501

5,670 6,462

4,755 4,726 6,411

7,093

5,092 6,312

1,297

1,291

1,207 1,245

844 843

1,235 1,071

1,147

1,126

5,455

5,994

4,059 3,869

3,044 2,739

3,157 3,081

3,155

4,091

1,661

1,749

1,324 1,289

1,292 958

947 1,245

1,305

1,527

13,865

15,535

12,260

12,865

9,935 9,266

11,750 12,490

10,699

13,056

0

5,000

10,000

15,000

20,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


110

US NGrid (Including Damages)

MAIN



111

2008 - 2017 MAIN LEAK REPAIRS

All Main Leak Repairs by Material

(Excluding Damages)

2,143 1,948 1,886

2,419

1,745 1,806

2,815 2,673

2,892 2,961

78

84 81

104

53 107

168

170

150 143

28

32 32

35

30 66

99 87

73 73

12

18 7

11

1

11

28 17

17 22

2,261

2,082 2,006

2,569

1,829 1,990

3,110 2,947

3,132 3,199

0

500

1,000

1,500

2,000

2,500

3,000

3,500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

NYC

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


112



(Excluding Damages)

186 226 217 172 86

154 194 239 210 193

751 695 639

786

638 522

651 675 762

608

200 135

153

202

179

144

152

144

178

139

52

57 66

72

59

55

63

73

65

22

1,189 1,113

1,075

1,232

962

875

1,060 1,131

1,215

962

0

500

1,000

1,500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LI

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


113



(Excluding Damages)

418 518 501 471

346 369

517

970

476 375

43

74 76

37

27 24

47

77

27

14

101

113 93

168

116 114

143

287

101

90

19

40 50 37

41 44

27

75

47

20

637

840

738 713

530 551

734

1,409

651

499

0

200

400

600

800

1,000

1,200

1,400

1,600

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

UPSTATE

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


114



(Excluding Damages)

2,747 2,692 2,604 3,062

2,177 2,329

3,526 3,882

3,578 3,529

872 853 796

927

718 653

866

922

939 765

329 280 278

405

325 324

394

518

352 302

83 115

123

120

101 110

118

165

129

115

4,087 4,035 3,819

4,514

3,321 3,416

4,904

5,487

4,998

4,711

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

NY State

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


115



(Excluding Damages)

4,451

5,193

3,953 4,305

3,273 3,163

3,966 4,242

3,428

5,491

1,428

1,834

1,351 1,219

759 710

729

823

664

919 255

356

266 248

203 212

238

262

231

353

102

131

85 86

56 54

72

89

60

89 6,236

7,514

5,655 5,858

4,291 4,139

5,005

5,416

4,383

6,852

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

BGC

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


116



(Excluding Damages)

86

134

58 50 70 75

93

153

82 92

58

77

122

47

43 13

21

33

15 9

20

15

24

17

13

9

22

14

18 17

7

2

6

4

8

3

8

4

13 12

171

228

210

118

134

100

144

204

128 130

0

100

200

300

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

EGC

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


117



(Excluding Damages)

0 0 0 0 0 0 0 0 0 0

359

515

258

210 166

126 98

139

57 44

16

24

15

14

22

13

22

12

13 6

17

20

9

8

11

12 10

13

6 10

392

559

282

232

199

151 130

164

76 60

0

100

200

300

400

500

600

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

CAPE

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


118



(Excluding Damages)

34

83

36 53

35 34 51

117

33

80

38

76

52

67

17 24

21

25

12

25 60

59

41

40

45 34

38

49

38

64 6

9

3

6

4 1

3

6

0

0

140

228

133

166

101 93

113

197

83

169

0

100

200

300

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LOWELL

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


119



(Excluding Damages)

4,571

5,410

4,047 4,408

3,378 3,272

4,110 4,512

3,543

5,663

1,883

2,502

1,783 1,543

985 873

869

1,020

748

997

351

454

346 319

283 268

320

337

300

440 132

162

103 104

79 70

93

112

79

117 6,945

8,531

6,283 6,375

4,727 4,483

5,392

5,981

4,670

7,217

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

MA

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


120



(Excluding Damages)

1,381 1,382

1,456 956 974 777

960

534 619 712

608

748

499 385

490

225

180

135 87

100

175

167

112

100

109

52

42

33 19

23

270

254

202 196 14

7

5

7 6 10

16

20

9 11 10

6 6

12 4 0

2,451

2,645

1,790 1,648 1,597

1,067 1,193

721 735 845

0

500

1,000

1,500

2,000

2,500

3,000

3,500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

RI

Other

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


121

2007 -2016 MAIN LEAK REPAIRS


(Excluding Damages)

8,700 9,558

7,619 8,426

6,529 6,378

8,596 8,927 7,740

9,904

3,363

4,103

3,078 2,855

2,193 1,751

1,915 2,077

1,774

1,862

855

901

736 824

717 644

756 888

671

765

485

531

428 420

194

187

216 284

214

242

80

118

31 12

12 6

6 12

4

0

13,483

15,211

11,892 12,537

9,645 8,966

11,489 12,188

10,403

12,773

0

4,000

8,000

12,000

16,000

20,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

US NGrid

Other

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF MAIN

LEAK REPAIRS

YEAR


82 10

3

19

1 3

79

0

1,99

3

85 14

0

19

6 12 65

0

1,77

4

75

103

10

1 0

70

0

1,75

7

93 13

6

20

3 2 8

1

0

2,25

4

68

53

10

0 0 43

0

1,66

5

101

140

16

0 1

151

0

1,59

7

121

15

2

28

6 1

221

0

2,60

9

154

16

6

33

3 1

223

0

2,40

0

171

111

36

9 0

137

0

2,71

0

16

7

101

39

5

0

140

0

2,78

6

0

700

1400

2100

2800

3500

Corrosion Natural Forces Excavation Other OutsideForce

Material orWelds

Equipment Operations Other

LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

122

MAIN LEAKS REPAIRED

COMPARISON BY LEAK CAUSES

LEAK REPAIRS

NYC


64

6

82

81

6

39

282

0

134

66

3

14

4

67

10

23

15

3

1

11

9

61

0

11

6

91

4 2

9

17

6

1

13

9

78

2

10

7

81

12

16

20

6

0

10

9

66

8

53

73

2 2

8

14

3

0

68

52

3

11

0

89

5 2

1

13

9

1

76

67

7

14

0

82

15

52

10

4

0

72

60

7

139

79

8

40

240

0

97

64

0

73

62

2

38

343

1

140

572

73 78

9

35

218

6

10

0

0

100

200

300

400

500

600

700

800

900


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

123

MAIN LEAKS REPAIRED


LEAK REPAIRS

LI


12

9 1

83

78

92

31

7

0

19

5

19

9

10

0

77

50

33

5

0

45

3

22

2

67

45

75

35

7

0

33

2

20

4

13

4

50

34

33

5

0

30

3

11

9

72

37

17

16

52

0

25

4

59

90

51

11

9

11

7

0

26

5

83

15

7

49

0 3

15

2

0

33

9

16

3 20

2

65

14

3

29

5

0

73

1

83

73

50

5 10

10

5

0

37

5

77

90

30

27

6 2

5

0

27

4

0

100

200

300

400

500

600

700

800


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

124

MAIN LEAKS REPAIRED


LEAK REPAIRS

UPSTATE


85

7

36

8

17

8

99

73

36

8

0

2,32

2

94

7

38

4

16

3

66

68

22

3

1

2,3

46

90

7

28

6

14

6

80

64

25

3

1

2,2

28

1,0

79

37

7

15

1

49

51

29

2

0

2,6

66

85

5

17

8

12

0

19

44

23

8

0

1,9

87

68

3

34

0

15

6

16

31

40

7

1

1,9

38

88

1

44

9

15

9

21

56

47

7

0

3,0

20

92

4

50

7

17

7

25

44

75

8

0

3,2

28

89

4

25

7

14

8

16

48

58

5

1

3,2

25

81

6

26

4

14

7

41

41

38

3

6

3,1

60

0

1000

2000

3000

4000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

125

MAIN LEAKS REPAIRED


LEAK REPAIRS

NY-STATE


1,81

1

1,82

9

100

26

689

35

10

1,84

2

2,3

38

2,0

82

12

8

25

63

9

33

15

2,3

84

1,4

09

40

7

10

6

2 82

35

1

2

3,4

05

1,1

48

48

5

82

0 23

43

1

0

3,7

72

74

7

23

8

67

1 15

29

2

0

3,0

00

72

6

33

3

85

1 32

32

4

1

2,7

22

79

8

46

6

54

1 17

29

2

1

3,4

30

87

6

54

2

72

0 27

35

1

0

3,6

20

72

0

28

2

73

1 19

30

7

0

3,0

54

1,0

68

25

7

65

2 6

44

7

5

5,0

67

0

800

1600

2400

3200

4000

4800

5600


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

126

MAIN LEAKS REPAIRED


LEAK REPAIRS

BGC


55

12

0 1 5

1

0

97

72

31

1

0 2

0

0

12

3

10

7

7

7

2

1

38

0

55

49

8

8

0

0

19

0

42

48

2 4

2 4

12

0

66

24

4 5

0 1

10

0

61

42

5

4

2

0

23

0

72

41

19

8

0 1

23

0

12

0

35

4 5

0

0

22

0

67

12

1

10

1

0

27

0

89

0

50

100

150


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

127

MAIN LEAKS REPAIRED


LEAK REPAIRS

EGC


357

2

13

2 2 3

2

24

51

1

0 1

2

1 7

5

3

32

24

6

4 1

7

1 2 1

5

1 1

3

20

6

1 1

7

1 2 1

4

0 8

16

5

0

25

0 2 2

1

0 1

1

12

2

0 1

1

0 2

25

0 2

10

3

1 1

8

0 3 2

3

0

0

13

7

1 1

8

2

1

22

0 1

62

0

23

0 1 7

0 6

48

0

26

0 3 7

0 2

0

100

200

300

400

500

600


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

128

MAIN LEAKS REPAIRED


LEAK REPAIRS

CCC


52

4

25

2

4

3

0

75

91

25

9

6

16

1

0

89

67

16

11

1

0

24

1

24

68

20

2

0 1

43

0

34

35

7 8

0 1

33

0

25

48

12

8

0

0

14

0

19

43

14

3

0 2

17

0

37

45

23

4

0 2

41

0

86

32

7

4

0

0

23

0

21

64

7

11

0

0

33

0

71

0

20

40

60

80

100


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

129

MAIN LEAKS REPAIRED


LEAK REPAIRS

CLW


2,27

5

1,84

7

138

31

700

42

12

2,03

8

3,0

12

2,1

38

15

0

32

66

4

39

18

2,6

28

1,8

29

43

4

14

1

6 85

42

8

4

3,4

97

1,4

71

51

4

10

9

1 26

50

7

0

3,8

56

99

5

24

7

10

4

3 22

35

8

0

3,1

02

92

0

34

9

10

9

1 35

37

3

1

2,8

04

98

6

48

6

79

3 22

35

5

1

3,5

39

1,0

99

58

5

10

2

2 31

43

7

0

3,8

27

84

9

29

3

10

5

1 20

35

9

0

3,1

48

1,1

92

26

5

11

2

3 9

51

4

5

5,2

29

0

1000

2000

3000

4000

5000

6000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

130

MAIN LEAKS REPAIRED


LEAK REPAIRS

MA


84

3

55

66

5 0

15

4

1

1,39

3

76

8

5 11

0 2 4

5

0

1,8

25

48

2

19

81

0 7 35

3

1,2

44

29

9

53

68

1

0 3

9

2

1,2

54

35

7

22

66

1

1

86

0

1,1

30

22

8

54

35

1 3 4

9

0

73

2

22

2

13

1

23

4 15

49

0

77

2

12

9

99

23

1 2 7

0

0

42

0

85

40

16

0 2 4

6

0

56

2

10

2

26

16

1

0 5

8

0

66

6

0

500

1000

1500

2000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

131

MAIN LEAKS REPAIRED


LEAK REPAIRS

RI


3,97

5

2,27

0

382

135

773

564

13

5,75

3

4,7

27

2,5

27

32

4

98

73

4

30

7

19

6,7

99

3,2

18

73

9

36

8

86

15

6 7

16

8

6,9

69

2,8

49

94

4

32

8

51

77

83

8

2

7,7

76

2,2

07

44

7

29

0

23

67

68

2

0

6,2

19

1,8

31

74

3

30

0

18

69

82

9

2

5,4

74

2,0

89

1,0

66

26

1

28

93

88

1

1

7,3

31

2,1

52

1,1

91

30

2

28

77

1,2

65

0

7,4

75

1,8

28

59

0

26

9

17

70

99

0

1

6,9

35

2,1

10

55

5

27

5

45

50

95

5

11

9,0

55

0

2000

4000

6000

8000

10000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

132

MAIN LEAKS REPAIRED


LEAK REPAIRS

NGRID


133

0.16

0.15 0.15 0.17 0.13 0.12

0.14 0.15 0.16

0.13

0.56 0.52

0.49

0.63

0.45

0.49

0.76

0.72

0.77 0.78

0.08 0.11 0.09 0.09

0.07 0.07 0.09 0.17

0.08 0.06 0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

LE

AK

R

EP

AIR

S P

ER

T

OT

AL

M

IL

ES

O

F M

AIN

YEAR

LI

NYC

UPSTATE

53%

TOTAL MAIN LEAK “RATES”

INCLUDING Damages

54% 54%

52%

53%

52% 50% 48%

13% 13% 12%

11%

PERCENTAGES SHOWN ARE PERCENT OF LEAK-PRONE PIPE

50%

47%

11%

49%

47%

10%

48%

46%

10%

47%

9%

45%

46%

44%

9%

42%

41%

7%


134

1.02

1.22

0.92 0.94

0.69 0.67

0.80

0.86

0.70

1.09

0.20

0.27 0.25

0.15 0.16 0.12

0.17 0.24

0.15 0.16 0.17

0.24 0.12

0.10 0.09

0.07 0.06 0.07

0.04 0.03

0.12

0.17

0.10 0.12 0.08

0.07 0.08

0.14

0.04 0.13

0.00

0.75

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

LE

AK

R

EP

AIR

S P

ER

T

OT

AL

M

IL

ES

O

F M

AIN

YEAR

BGC

EGC

Cape

Lowell


INCLUDING Damages


58%

60%

61%

56%

54% 53%

51%

49%

18%

15% 15%

14% 13% 13%

12% 12%

12%

17%

16%

16% 15% 14%

13%

14% 14%

12%

12%

11%

11% 10% 9%

8% 5% 6% 4%

48%

11%

3%

12%

47%


135

0.81 0.85

0.60

0.54 0.52

0.35 0.38

0.23 0.24 0.27

0.00

0.50

1.00

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

LE

AK

R

EP

AIR

S P

ER

T

OT

AL M

ILE

S O

F M

AIN

YEAR

RI


INCLUDING Damages


52%

51%

50%

50% 47%

46% 44%

42% 39% 37%


136

0.21 0.21 0.19

0.23

0.17

0.17

0.24

0.27

0.25 0.23

0.65

0.80

0.59 0.59

0.44

0.42

0.49

0.55

0.43

0.66

0.81

0.85

0.60 0.54

0.52

0.35 0.38

0.23 0.24 0.27

0.40 0.44

0.35 0.36

0.29 0.27

0.34

0.36

0.30 0.37

0.00

0.50

1.00

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

LE

AK

R

EP

AIR

S P

ER

T

OT

AL

M

IL

ES

O

F M

AIN

YEAR

NY

MA

RI

US-NGrid


INCLUDING Damages


36% 33%

35% 36% 33%

32%

31%

30%

42%

41%

40% 38%

37%

36%

34%

33%

52% 51%

50% 50%

47%

46% 44%

42%

40% 39%

38% 37%

35% 34%

32%

33% 30%

31%

32%

40%

28%

39%

31%

31%


137

0.78

0.13 0.06

0.23

0.0

0.2

0.4

0.6

0.8

1.0

NYC LI UPSTATE All NY

NEW YORK

1.08

0.03 0.13 0.16

0.66

0.0

0.2

0.4

0.6

0.8

1.0

BOSTON CAPE LOWELL ESSEX All MA

MASSACHUSETTS

0.27

0.0

0.2

0.4

0.6

0.8

1.0

RI

RI

MAIN LEAK “RATES”

Total Main Leak Repairs (incl. damages) / Mile of Total Main

0.23

0.66

0.27 0.37

0.0

0.2

0.4

0.6

0.8

1.0

NY MA RI NATIONALGRID

NGRID MAIN LEAK RATES BY STATE


1.2

2

0.0

7

0.0

2

1.1

3

0.0

8

0.0

2

1.1

1

0.0

8

0.0

1

1.4

5

0.0

9

0.0

1

1.0

6

0.0

6

0.0

0

1.1

1

0.1

2

0.0

1

1.7

7

0.1

8

0.0

3

1.7

1

0.1

8

0.0

2

2.0

5

0.1

5

0.0

1

2.1

8

0.1

5

0.0

2

0

0.5

1

1.5

2

2.5

CAST IRON ALL STEEL PLASTIC

MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

138


COMPARISON BY MATERIAL

LEAK REPAIRS

PER MILE OF MAIN

NYC EXCLUDING Damages

COUNTING EACH INDIVIDUAL REPAIR AS A LEAK


0.4

8

0.2

1

0.0

2

0.6

0

0.1

8

0.0

2

0.6

1

0.1

8

0.0

2

0.5

0

0.2

2

0.0

2 0

.26

0.1

9

0.0

2

0.4

7

0.1

5

0.0

2

0.6

1

0.1

9

0.0

2

0.7

7

0.1

9

0.0

2

0.7

6

0.2

2

0.0

2

0.7

4

0.1

8

0.0

2

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

139



LEAK REPAIRS

PER MILE OF MAIN

LI EXCLUDING Damages



0.5

9

0.0

4

0.0

0

0.7

8

0.0

5

0.0

1

0.7

8

0.0

4

0.0

1

0.7

7

0.0

5

0.0

1

0.5

9

0.0

4

0.0

1

0.6

7

0.0

4

0.0

1

0.9

9

0.0

5

0.0

1

1.9

8

0.1

0

0.0

2

1.0

5

0.0

3

0.0

1

0.9

2

0.0

3

0.0

0

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

140



LEAK REPAIRS

PER MILE OF MAIN

UPSTATE EXCLUDING Damages



0.9

6

0.1

2

0.0

1

0.9

7

0.1

2

0.0

1

0.9

7

0.1

1

0.0

2

1.1

6

0.1

4

0.0

1

0.8

5

0.1

1

0.0

1

0.9

3

0.1

0

0.0

1

1.4

5

0.1

3

0.0

1

1.6

4

0.1

5

0.0

2

1.6

7

0.1

4

0.0

1

1.7

4

0.1

1

0.0

1

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

141



LEAK REPAIRS

PER MILE OF MAIN

NY State EXCLUDING Damages



1.9

7

0.6

9

0.0

7

2.3

4

0.9

1

0.0

8

1.8

2

0.6

8

0.0

5

2.0

3

0.6

3

0.0

5

1.5

9

0.4

2

0.0

3

1.5

8

0.4

1

0.0

3

2.0

4

0.4

4

0.0

3

2.2

5

0.5

0

0.0

4

1.8

8

0.4

3

0.0

4

3.1

0

0.6

2

0.0

5

0

0.5

1

1.5

2

2.5

3

3.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

142



LEAK REPAIRS

PER MILE OF MAIN


BGC EXCLUDING Damages


0.9

3

0.2

2

0.0

2

1.4

6

0.2

5

0.0

0

0.6

4

0.4

1

0.0

1

0.5

7

0.1

8

0.0

1

0.8

2

0.1

6

0.0

2

0.8

9

0.0

6

0.0

1

1.1

4

0.1

2

0.0

2

1.9

4

0.1

3

0.0

1

1.0

8

0.1

0

0.0

4

1.2

6

0.0

7

0.0

3

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

143



LEAK REPAIRS

PER MILE OF MAIN


EGC EXCLUDING Damages


0.0

0

0.4

0

0.0

1

0.0

0

0.5

7

0.0

1

0.0

0

0.2

9

0.0

1

0.0

0 0

.25

0.0

1

0.0

0 0

.22

0.0

1

0.0

0 0.1

6

0.0

1

0.0

0 0.1

5

0.0

1

0.0

0 0.1

9

0.0

1

0.0

0

0.0

9

0.0

2

0.0

0

0.0

7

0.0

1

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

144



LEAK REPAIRS

PER MILE OF MAIN


CAPE EXCLUDING Damages


0.2

6

0.1

4

0.0

1

0.6

6

0.2

0

0.0

2

0.2

9

0.1

4

0.0

1

0.4

5

0.1

6

0.0

1

0.3

1

0.0

9

0.0

1

0.3

2

0.0

9

0.0

0

0.5

1

0.0

9

0.0

0

1.2

1

0.1

2

0.0

1

0.3

6

0.0

9

0.0

0

0.8

9

0.1

5

0.0

1

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

145



LEAK REPAIRS

PER MILE OF MAIN


LOWELL EXCLUDING Damages


1.8

4

0.5

0

0.0

3

2.2

2

0.6

7

0.0

4

1.7

0

0.4

9

0.0

2

1.8

9

0.4

4

0.0

2

1.4

9

0.3

0

0.0

2

1.4

9

0.2

8

0.0

1

1.9

3

0.3

0

0.0

2

2.1

9

0.3

4

0.0

2

1.7

8

0.2

8

0.0

3

2.9

3

0.3

8

0.0

2

0

0.5

1

1.5

2

2.5

3

3.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

146



LEAK REPAIRS

PER MILE OF MAIN


MA EXCLUDING Damages


1.5

4

0.6

3

0.2

8

1.6

5

0.7

5

0.2

5

1.1

0

0.5

1

0.1

9

1.0

9

0.4

2

0.1

8

1.1

3

0.5

3

0.0

1

0.9

3

0.2

5

0.0

1

1.1

8

0.2

1

0.0

0

0.6

9

0.1

6

0.0

1

0.8

3

0.1

1

0.0

1

0.9

5

0.1

2

0.0

1

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

147



LEAK REPAIRS

PER MILE OF MAIN


RI EXCLUDING Damages


1.4

0

0.2

7

0.0

4

1.5

7

0.3

2

0.0

4

1.2

8

0.2

5

0.0

3

1.4

4

0.2

4

0.0

3

1.1

5

0.1

9

0.0

1

1.1

5

0.1

6

0.0

1

1.6

0

0.1

8

0.0

1

1.7

2

0.2

1

0.0

2

1.5

9

0.1

7

0.0

3

2.1

1

0.1

9

0.0

1

0

0.5

1

1.5

2

2.5


MATERIAL

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

148



LEAK REPAIRS

PER MILE OF MAIN

US-NGrid EXCLUDING Damages



149



LEAK REPAIRS

PER MILE OF MAIN


2.1

8

0.1

5

0.0

2

0.7

4

0.1

8

0.0

2

0.9

2

0.0

3

0

0

0.5

1

1.5

2

2.5


MATERIAL

NYC

LI

UPSTATE


150



LEAK REPAIRS

PER MILE OF MAIN


3.1

1

0.6

2

0.0

4

1.2

6

0.0

7

0.0

3

0.0

0

0.0

7

0.0

1

0.8

9

0.1

5

0.0

1

0

0.5

1

1.5

2

2.5

3

3.5


MATERIAL

BGC

EGC

CAPE

LOWELL


151



LEAK REPAIRS

PER MILE OF MAIN


0.95

0.12 0.01

0

0.5

1

1.5

2

2.5


MATERIAL

RI


152



LEAK REPAIRS

PER MILE OF MAIN

US NGrid EXCLUDING Damages

1.7

4

0.1

1

0.0

1

2.9

3

0.3

8

0.0

2

0.9

5

0.1

2

0.0

1

0

0.5

1

1.5

2

2.5

3

3.5


MATERIAL

NY

MA

RI


153

A CLOSER LOOK AT

CAST IRON MAINS


154

0

50

100

150

200

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

17 22 36

18 23 29 36 56

153

56 Miles/Yr

Year

Avg 10-Yr Attrition Rate: 44.60 Miles/Year ( 3.29%)

0

200

400

600

800

1000

1200

1400

1600

1800

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

CAST IRON MAIN INVENTORY

Cast Iron Inventory Includes Wrought Iron

CAST IRON ATTRITION RATE

NYC DOT-

Reported

Pipe

Inventories


155

0

10

20

30

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

8 7

23

10 8 6 14

5

36 15 Miles/Yr

Year


0

50

100

150

200

250

300

350

400

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year



LI DOT-

Reported

Pipe

Inventories


156

0

10

20

30

40

50

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

32 45

29 28 26 38

25 34 36

47 Miles/Yr

Year

Avg 10-Yr Attrition Rate: 33.96 Miles/Year (8.36%)

0

100

200

300

400

500

600

700

800

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year



UPSTATE DOT-

Reported

Pipe

Inventories



157

0

50

100

150

200

250

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

57 74 88 56 57 73 75 59

225

118

Miles/Yr

Year


0

500

1000

1500

2000

2500

3000

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year



NY STATE DOT-

Reported

Pipe

Inventories


158

0

500

1000

1500

2000

2500

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year



0

20

40

60

80

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

17

36 52

44

62 57 59 58 54 61 Miles/Yr

Year


BGC DOT-

Reported

Pipe

Inventories



159

0

10

20

30

40

50

60

70

80

90

100

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year


0

1

2

3

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

0.4 1.0 1.1

2.6 2.4 1.6 3.0 2.0 3.0 3.0 Miles/Yr

Year


EGC DOT-

Reported

Pipe

Inventories




160

0

0.2

0.4

0.6

0.8

1

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year


0

0.01

0.02

0.03

0.04

0.05

'08 '09 '10 '11 '12 '13 '14 '15 '16 '170.0 0.0 0.0 0.0

0.1

0.0 0.0 0.0 0.0 0.0

Miles/Yr

Year

Avg 10-Yr Attrition Rate: 0.00 Miles/Year ( 0%)

CAPE DOT-

Reported

Pipe

Inventories



161

0

20

40

60

80

100

120

140

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year


-1.5

0.5

2.5

4.5

6.5

8.5

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

2.1 3.9 3.9 4.1

5.4 7.5 6.0

2.0

1.0 6.0 Miles/Yr

Year


LOWELL DOT-

Reported

Pipe

Inventories




162

0

500

1000

1500

2000

2500

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year


0

20

40

60

80

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

19

41 57 51 70 66 67 63 58 71 Miles/Yr

Year


MA DOT-

Reported

Pipe

Inventories




163

0

100

200

300

400

500

600

700

800

900

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year


0

10

20

30

40

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

4 11 8

3 16 28 25

37

15 24

Miles/Yr

Year


RI DOT-

Reported

Pipe

Inventories



164

0

1000

2000

3000

4000

5000

6000

7000

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year


0

100

200

300

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

79 126 152 109 143

166 168 158 298 213

Miles/Yr

Year


US-NGrid DOT-

Reported

Pipe

Inventories



165

TOTAL CAST IRON

MAIN BREAKS

103

135

107

132

60

140

166

163

105

92

73

134

109 94

49

102 136 133

72 66

47 34

68 63

61 80

142

193

70

84

-1,500

1,500

4,500

0

50

100

150

200

250

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

BREAKS

YEAR

NYC

LI

UPSTATE

Heating

Degree Days


166

TOTAL CAST IRON

MAIN BREAKS

188

570

328

453

227

308

379

491

256 246

3 13 7 8 2 4 4 18

4 1

0 0 0 0 0 0 0 0 0 0

1 28 10

19 7 12 14 23

6 7

-500

1,500

3,500

5,500

0

100

200

300

400

500

600

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

BREAKS

YEAR

BGC

EGC

Cape

Lowell

Heating

Degree

Days


167

TOTAL CAST IRON

MAIN BREAKS

58

86

58

85

40

70

140

99

39

26

0

2,000

4,000

6,000

0

20

40

60

80

100

120

140

160

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

BREAKS

YEAR

RI

Heating

Degree

Days


168

TOTAL CAST IRON

MAIN BREAKS

223

303

284 289

170

322

422 489

247 242

192

611

345

480

236 324

397

532

266 254

58 86

58 85 40 70

140 99

39 26

473

1,000

687

854

446

716

959

1,120

552 522

0

300

600

900

1200

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

BREAKS

YEAR

NY State

MA

RI

US-

NGRID


169

CAST IRON

MAIN BREAK “RATES”

0.08

0.11

0.11

0.11

0.07

0.13

0.17

0.21

0.11

0.12

0.08

0.25

0.14

0.21

0.10

0.15

0.19

0.25

0.13 0.13

0.06

0.10

0.07

0.10

0.05

0.08

0.17

0.13

0.05 0.04

0.08

0.17

0.12

0.15

0.08

0.13

0.18

0.22

0.11

0.11

0.00

0.07

0.14

0.21

0.28

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

BREAKS

PER MILE

YEAR

NY State

MA

RI

US-NGrid


170

CAST IRON MAIN BREAK “RATES”

“NY REGION” COMPARISON BY DIAMETER

1

0.2

1

0.0

8

0.0

6

0.0

0

0 0

.04

0

0.0

8

1

0.1

6

0.3

1

0.0

4

0.0

0

0

0

0

0.2

5

0

0.2

6

0.2

2

0.1

6

0.1

0

0

0 0

0.2

1

0.00

0.20

0.40

0.60

0.80

1.00

1.20

<4" 4' 6" 8" 10" - 12" 16" 20" - 24" >24" ALL

NYC

LI

UPSTATE

CAST IRON BREAKS

PER MILE OF CI MAIN

DIAMETER

Size 2016 2017 Size 2016 2017 Size 2016 2017 Size 2016 2017

< 4" 5 5 6" 1,140 1,075 10" - 12" 269 260 20" - 24" 52 50

4" 401 366 8" 203 195 16" 47 47 24" 23 23

CI Inventory CI Inventory CI Inventory CI Inventory


171


“MA REGION” COMPARISON BY DIAMETER

0.3

8

0.1

8

0.1

5

0.0

8

0.0

5

0.0

7

0

0.0

8 0.1

4

0 0

.03

0

0

0

0

0

0 0.0

1

0

0

0

0

0

0

0

0

0

0

0.2

1

0

0 0

0

0

0

0.0

8

0.00

0.20

0.40

0.60

0.80

1.00

<4" 4' 6" 8" 10" - 12" 16" 20" - 24" >24" ALL

BGC

EGC

Cape

Lowell

CAST IRON BREAKS

PER MILE OF CI MAIN

DIAMETER


< 4" 87 79 6" 750 719 10" - 12" 248 245 20" - 24" 56 56

4" 669 641 8" 144 139 16" 33 33 24" 25 24



172


“RI REGION” COMPARISON BY DIAMETER

0.18

0.04 0.04

0.03 0

0 0 0

0.03

0.00

0.10

0.20

0.30

0.40

0.50

<4" 4' 6" 8" 10" - 12" 16" 20" - 24" >24" ALL

RI

CAST IRON BREAKS

PER MILE OF CI MAIN

DIAMETER


< 4" 6 5 6" 319 303 10" - 12" 73 71 20" - 24" 14 13

4" 302 281 8" 32 30 16" 18 17 24" 5 5



173


“ALL REGION” COMPARISON BY DIAMETER

0.4

1

0.2

2

0.1

4

0.0

8

0.0

2

0.0

0

0.0

4

0.0

0

0.1

3

0.3

2

0.1

7

0.1

4

0.0

8

0.0

5

0.0

6

0.0

0 0

.08

0.1

3

0.1

8

0.0

5

0.0

6

0.0

7

0.0

4

0.0

0

0.0

0

0 0

.03

0.3

1

0.1

6

0.1

2

0.0

8

0.0

3

0.0

2

0.0

2

0.0

4 0

.12

0.00

0.20

0.40

0.60

0.80

1.00

<4" 4' 6" 8" 10" - 12" 16" 20" - 24" >24" ALL

NY State

MA

RI

US-NGrid

CAST IRON BREAKS

PER MILE OF CI MAIN

DIAMETER


< 4" 99 90 6" 2,202 2,098 10" - 12" 587 577 20" - 24" 122 119

4" 1,366 1,288 8" 377 363 16" 96 98 24" 53 53



174

A CLOSER LOOK AT

STEEL MAINS


175

UNPROTECTED

STEEL MAIN INVENTORY

BARE/UNPROTECTED STEEL ATTRITION RATE

-10

0

10

20

30

40

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

13 7 7

33 16

8 4 0 -4 -6

Miles/Yr

Year


0

50

100

150

200

250

300

350

400

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

NYC DOT-

Reported

Pipe

Inventories

NOTE: 2016 Inventory increased due to GIS (NRG) data correction


176

UNPROTECTED


UNPROTECTED STEEL ATTRITION RATE

0

50

100

150

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

38 107

48 45 51 52 52 46 3 79

Miles/Yr

Year


0

500

1000

1500

2000

2500

3000

3500

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

LI DOT-

Reported

Pipe

Inventories

NOTE: 2016 Inventory increased due to GIS (NRG) data correction


177

UNPROTECTED



0

10

20

30

40

50

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

44

1

9 5 33 2

5 5 8 6 Miles/Yr

Year


0

50

100

150

200

250

300

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

UPSTATE DOT-

Reported

Pipe

Inventories


178

UNPROTECTED



0

50

100

150

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

95 115 64 83 100

62 61 50 8 79

Miles/Yr

Year


0

500

1000

1500

2000

2500

3000

3500

4000

4500

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

NY State DOT-

Reported

Pipe

Inventories

NOTE: NYC and LI 2016 Inventory increased due to GIS (NRG) data correction


179

UNPROTECTED



0

20

40

60

80

100

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

40 62 57 58 46 31 36 8

36

58 Miles/Yr

Year

Avg 10 -Yr Attrition Rate: 43.24 Miles/Year ( 3.98%)

0

200

400

600

800

1000

1200

1400

1600

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

BGC DOT-

Reported

Pipe

Inventories

NOTE: In NE(BGC), Attrition is due to both replacement and “added” cathodic protection.


180

UNPROTECTED



0

2

4

6

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

0.5 5.9

3 2

1 2 0 0 0 1

Miles/Yr

Year

Avg 10 -Yr Attrition Rate: 1.55 Miles/Year ( 8.61%)

0

10

20

30

40

50

60

70

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

EGC DOT-

Reported

Pipe

Inventories

NOTE: In NE(EGC), Attrition is due to both replacement and “added” cathodic protection.


181

UNPROTECTED



0

20

40

60

80

100

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

11 17

18 34 45 22 24

15 16

18

Miles/Yr

Year

Avg 10 -Yr Attrition Rate: 22.02 Miles/Year (45.88%)

0

50

100

150

200

250

300

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

CAPE DOT-

Reported

Pipe

Inventories

NOTE: In NE(Cape), Attrition is due to both replacement and “added” cathodic protection.


182

UNPROTECTED



-100

-50

0

50

100

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

2 9 6 6

-13

4 4 3

-7

4

Miles/Yr

Year


0

10

20

30

40

50

60

70

80

90

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

LOWELL DOT-

Reported

Pipe

Inventories

NOTE: In NE(Lowell), Attrition is due to both replacement and “added” cathodic protection.


183

UNPROTECTED



0

50

100

150

200

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

54 93 84 100 79 59 69

27 46 80

Miles/Yr

Year

Avg 10-Yr Attrition Rate: 69.13 Miles/Year (5.67%)

0

200

400

600

800

1000

1200

1400

1600

1800

2000

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

MA DOT-

Reported

Pipe

Inventories

NOTE: In NE(MA), Attrition is due to both replacement and “added” cathodic protection.


184

UNPROTECTED



-100

-50

0

50

100

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

16

-10

82 12 46

26 25 31 36 21

Miles/Yr

Year


0

100

200

300

400

500

600

700

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

RI DOT-

Reported

Pipe

Inventories

NOTE: In RI, Attrition is due to both replacement and “added” cathodic protection.


185

UNPROTECTED



0

50

100

150

200

250

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

165 198 230 194 226 148 154 108 89

181 Miles/Yr

Year


0

1000

2000

3000

4000

5000

6000

7000

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

Miles

Year

US-NGrid DOT-

Reported

Pipe

Inventories

NOTE:

• NYC and LI 2016 Inventory increased due to GIS (NRG) data correction


186

MAIN CORROSION LEAK “RATES”

CORROSION Leak Repairs Per Mile of “TOTAL” Steel

0.14 0.15

0.14

0.18

0.15

0.12

0.16

0.14 0.15

0.14

0.05 0.06

0.05

0.06 0.05 0.07

0.08 0.09 0.10

0.10

0.03

0.05

0.06

0.05

0.03

0.02 0.02

0.04 0.02 0.02

0.00

0.10

0.20

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LE

AK

RE

PA

IRS

PE

R M

ILE

YEAR

LI

NYC

UPSTATE


187



0.74

0.97

0.59

0.49

0.32 0.32 0.36

0.40

0.34

0.49

0.15

0.20

0.30

0.14

0.13 0.07 0.12 0.09 0.10

0.03

0.38

0.54

0.26

0.23

0.19 0.14 0.13

0.17

0.08 0.10

0.08 0.13

0.10 0.10

0.05 0.07 0.07 0.07 0.05

0.10

0.00

0.25

0.50

0.75

1.00

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LE

AK

RE

PA

IRS

PE

R M

ILE

YEAR

BGC

EGC

Cape

Lowell

INCLUDES ALL CORROSION LEAKS, REGARDLESS OF MAIN MATERIAL


188



0.68 0.63

0.40

0.26 0.32

0.21 0.21

0.12 0.08

0.10

0.00

0.25

0.50

0.75

1.00

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LE

AK

RE

PA

IRS

PE

R M

ILE

YEAR

RI



189



0.09 0.10 0.09 0.11 0.09 0.07 0.09 0.09 0.09 0.08

0.51

0.69

0.42

0.34

0.24 0.22

0.25 0.26

0.20

0.30

0.68

0.63

0.40

0.26

0.32

0.21 0.21

0.12

0.08

0.10

0.25 0.31

0.21 0.19

0.15 0.12 0.14 0.14

0.12 0.14

0.00

0.25

0.50

0.75

1.00

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LE

AK

RE

PA

IRS

PE

R M

ILE

YEAR

NY State

MA

RI

US-NGrid



190

SERVICE

INVENTORY

ANALYSIS


-

50,000

100,000

150,000

200,000

250,000

300,000

350,000

400,000

450,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Copper

PROTECTED STEEL

UNPROT’D STEEL

191

SERVICE

INVENTORY TREND NYC

Note: See number of services breakdown in appendix


-

50,000

100,000

150,000

200,000

250,000

300,000

350,000

400,000

450,000

500,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Copper

PROTECTED STEEL

UNPROT’D STEEL

192

SERVICE

INVENTORY TREND LI



-

50,000

100,000

150,000

200,000

250,000

300,000

350,000

400,000

450,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Copper

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

193

SERVICE

INVENTORY TREND UPSTATE



-

200,000

400,000

600,000

800,000

1,000,000

1,200,000

1,400,000

2008 2009 2010 2011 2012 2013 20142015 2016 2017

Plastic

Copper

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

194

SERVICE

INVENTORY TREND NY STATE



-

50,000

100,000

150,000

200,000

250,000

300,000

350,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Copper

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

195

SERVICE

INVENTORY TREND BGC



-

5,000

10,000

15,000

20,000

25,000

30,000

35,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

196

SERVICE

INVENTORY TREND EGC



-

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

100,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

197

SERVICE

INVENTORY TREND CAPE



-

10,000

20,000

30,000

40,000

50,000

60,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Copper

PROTECTED STEEL

UNPROT’D STEEL

Other

198

SERVICE

INVENTORY TREND LOWELL



-

50,000

100,000

150,000

200,000

250,000

300,000

350,000

400,000

450,000

500,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Copper

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

199

SERVICE

INVENTORY TREND MA



-

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic

Copper

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

200

SERVICE

INVENTORY TREND RI



-

200,000

400,000

600,000

800,000

1,000,000

1,200,000

1,400,000

1,600,000

1,800,000

2,000,000

2008 2009 2010 2011 2012 2013 20142015 2016 2017

Plastic

Copper

Cast Iron

PROTECTED STEEL

UNPROT’D STEEL

Other

201

SERVICE

INVENTORY TREND US-NGrid



202

SERVICE INVENTORY

NYC LI 568,846 SERVICES 546,925 SERVICES

Upstate 563,914 SERVICES NY State 1,679,685 SERVICES

PROT'D

STEEL

36,955

6%

UNPROT'D

STEEL

26,896

5% COPPER

111,065

20%

PLASTIC

393,930

69%

PROT'D STEEL

34,628

6%

UNPROT'D

STEEL

78,001

14%

COPPER

4,290

1%

PLASTIC

430,006

79%

PROT'D STEEL

14,710

3%

UNPROT'D

STEEL

124,123

22% COPPER

15,939

3%

PLASTIC

408,725

72%

OTHER (incl CI)

862

<1%

PROT'D STEEL

86,293

5%

UNPROT'D

STEEL

229,020

14% COPPER

131,294

8%

PLASTIC

1,232,661

73%

OTHER (incl CI)

417

0%


203

SERVICE INVENTORY

BGC EGC 506,905 SERVICES 52,100 SERVICES

CAPE 117,390 SERVICES

MA 753,920 SERVICES

LOWELL 77,525 SERVICES

PROT'D

STEEL

29,271

6%

UNPROT'D

STEEL

98,873

19%

COPPER

8,534

2%

PLASTIC

288,814

57%

OTHER

(incl CI)

81,413

16%

PROT'D

STEEL

18,178

16%

UNPROT'D

STEEL

3,317

3%

COPPER

0

0%

PLASTIC

86,137

73%

OTHER

(incl CI)

9,686

8%

PROT'D

STEEL

4,638

9%

UNPROT'D

STEEL

4,296

8%

COPPER

0

0%

PLASTIC

33,103

64%

OTHER

(incl CI)

10,063

19%

PROT'D

STEEL

19,449

25%

UNPROT'D

STEEL

4,761

6% COPPER

1

0%

PLASTIC

51,348

66%

OTHER

(incl CI)

1,966

3%

PROT'D

STEEL

71,536

9%

UNPROT'D

STEEL

111,247

15%

COPPER

8,535

1%

PLASTIC

459,402

61%

OTHER

(incl CI)

103,200

14%


204

PROT'D

STEEL

9,456

5%

UNPROT'D

STEEL

42,969

22%

COPPER

192

0%

PLASTIC

142,956

73%

OTHER

(incl CI)

988

0%

SERVICE INVENTORY

RI 196,505 SERVICES


205

PROT'D

STEEL

9,456

5%

UNPROT'D

STEEL

42,969

22%

COPPER

201

0%

PLASTIC

142,956

73%

OTHER

(incl CI)

988

0%

SERVICE INVENTORY

NY State 1,679,685 SERVICES MA 753,920 SERVICES

US-NGrid 2,630,110 SERVICES

RI 196,505 SERVICES

PROT'D

STEEL

86,293

5%

UNPROT'D

STEEL

229,020

14%

COPPER

131,294

8%

PLASTIC

1,232,661

73%

OTHER

(incl CI)

417

0% PROT'D

STEEL

71,536

9%

UNPROT'D

STEEL

111,247

15%

COPPER

8,535

1%

PLASTIC

459,402

61%

OTHER

(incl CI)

99,347

13%

PROT'D

STEEL

167,285

6% UNPROT'D

STEEL

383,236

15%

COPPER

140,021

5%

PLASTIC

1,790,472

68%

OTHER

(incl CI)

104,549

4%


206

National Grid - US PHMSA Average 487,640 SERVICES 2,630,110 SERVICES

2017 SERVICE INVENTORY

U.S. COMPARATIVE SUMMARY

PROT'D

STEEL

102,051

21%

UNPROT'D

STEEL

21,755

5%

COPPER

5675

1%

PLASTIC

346,819

71%

OTHER

(incl CI)

11,341

2%

PROT'D

STEEL

167,285

6%

UNPROT'D

STEEL

383,236

15%

COPPER

140,021

5%

PLASTIC

1,790,472

68%

OTHER (incl

CI)

104,549

4%


207

SERVICE

LEAK REPAIR

ANALYSIS NOTE: Above Ground Leaks, which are included in the DOT

Reports (beginning in 2012), are excluded from this report in

order to maintain the integrity of our trend analyses for

distribution (not CMS) piping.


PROT'D

STEEL

6%

UNPROT'D

STEEL

5% COPPER

20%

PLASTIC

69%

208

COPPER

22%

PLASTIC

37% ALL

STEEL

41%

TOTAL SERVICE INVENTORY

BY MATERIAL

TOTAL SERVICE LEAK REPAIRS

BY MATERIAL

NYC TOTAL SERVICE LEAK REPAIRS

1,412 LEAKS

IMPORTANT: Service Repairs are identified by the service material. This is not necessarily the material that leaked.

For example - a leak caused by corrosion of a steel valve or fitting on a plastic service is shown as a plastic service leak.

568,846 SERVICES

INCLUDING Damages


PROT'D

STEEL

6%

UNPROT'D

STEEL

14%

COPPER

1%

PLASTIC

79%

209

COPPER

2%

PLASTIC

46%

ALL

STEEL

52%


BY MATERIAL


BY MATERIAL

LI

1,834 LEAKS




544,174 SERVICES

INCLUDING Damages


PROT'D

STEEL

3%

UNPROT'D

STEEL

25%

COPPER

3%

PLASTIC

68%

OTHER

(incl CI)

1%

210

COPPER

4%

PLASTIC

48%

ALL

STEEL

48%


BY MATERIAL


BY MATERIAL

UPSTATE

952 LEAKS




563,914 SERVICES

INCLUDING Damages


PROT'D

STEEL

5%

UNPROT'D

STEEL

14%

COPPER

8%

PLASTIC

73%

OTHER

(incl CI)

0%

COPPER

9%

PLASTIC

43%

ALL

STEEL

48%

211


BY MATERIAL


BY MATERIAL

NY State

4,171 LEAKS




1,679,685 SERVICES

INCLUDING Damages


PROT'D

STEEL

6%

UNPROT'D

STEEL

19%

COPPER

2%

PLASTIC

57%

OTHER

(incl CI)

16%

COPPER

4%

PLASTIC

30%

ALL

STEEL

65%

CAST

IRON

1%

212


BY MATERIAL


BY MATERIAL

BGC

2,839 LEAKS




506,905 SERVICES

INCLUDING Damages


PROT'D

STEEL

9%

UNPROT'D

STEEL

8% COPPER

0%

PLASTIC

64%

OTHER

(incl CI)

19%

PLASTIC

56%

ALL

STEEL

43%

CAST

IRON

1%

213


BY MATERIAL


BY MATERIAL

EGC

174 LEAKS




52,100 SERVICES

INCLUDING Damages


PROT'D

STEEL

16%

UNPROT'D

STEEL

3%

COPPER

0%

PLASTIC

73%

OTHER

(incl CI)

8%

PLASTIC

67%

ALL

STEEL

31%

OTHER

2%

214


BY MATERIAL


BY MATERIAL

CAPE

321 LEAKS




117,390 SERVICES

INCLUDING Damages


PROT'D

STEEL

25%

UNPROT'D

STEEL

6%

COPPER

0%

PLASTIC

66%

OTHER

(incl CI)

3%

PLASTIC

40%

ALL

STEEL

60%

215


BY MATERIAL


BY MATERIAL

LOWELL

231 LEAKS




77,525 SERVICES

INCLUDING Damages


PROT'D

STEEL

9%

UNPROT'D

STEEL

15% COPPER

1%

PLASTIC

61%

OTHER

(incl CI)

14% COPPER

3%

PLASTIC

35%

ALL

STEEL

60% OTHER

1%

CAST

IRON

1%

216


BY MATERIAL


BY MATERIAL

MA

3,565 LEAKS




746,313 SERVICES

INCLUDING Damages


PROT'D

STEEL

5%

UNPROT'D

STEEL

22%

COPPER

0%

PLASTIC

73%

OTHER

(incl CI)

0%

COPPER

1%

PLASTIC

23%

ALL

STEEL

76%

217


BY MATERIAL


BY MATERIAL

RI

654 LEAKS




196,505 SERVICES

INCLUDING Damages


PROT'D

STEEL

6%

UNPROT'D

STEEL

15%

COPPER

5%

PLASTIC

70%

OTHER

(incl CI)

4% COPPER

6%

PLASTIC

38%

ALL

STEEL

55%

CAST

IRON

1%

218


BY MATERIAL


BY MATERIAL

US-NGrid

8,390 LEAKS




2,630,110 SERVICES

INCLUDING Damages


620 520 572

729 571

976

1,485 1,489

1,036 1,194

20

23

26

26

38

55

67 62

75

37

50 106 90

82

62

136

149 121

103

104

50 50 29

44

31

50

84 61

68

77

740 699 717

881

702

1,217

1,785 1,733

1,282 1,412

0

500

1,000

1,500

2,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


219


SERVICE



1,036 942 969 1,082

1,212 1,099 1,024 1,054 978 941

127 147 124

146

143 146

185 187 182 196

668 654 600

632 580

510 609 535 557 516

138 126 136

138 130

125 107 98 226

181

1,969 1,869

1,829

1,998 2,065

1,880 1,925 1,874 1,943 1,834

0

500

1,000

1,500

2,000

2,500

3,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


220

LI (Including Damages)

SERVICE



638 629 688 529 501 495

591 714

588 545

103 106 103

101 66 58

85

68

75 68

208 281 258

236

176 172

221

221

196 175

131

138 132

170

164 171

177

403

193 137

1,080 1,154 1,181

1,036

907 896

1,074

1,406

1,052

925

0

500

1,000

1,500

2,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


221

UPSTATE (Including Damages)

SERVICE



2,751 2,294 2,091 2,229 2,340 2,284

2,570 3,257

3,257 2,538

250 276

253 273 247

259

337 317

332 301 926

1,041 948 950

818

818

979 877

856 795 319 314 297

352

325

346

368 562

487 395 3,789 3,722 3,727

3,915 3,674

3,993

4,784 5,013

4,277 4,171

0

2,000

4,000

6,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


222

NY State (Including Damages)

SERVICE



1,748 1,868

2,158 2,082

1,574 1,738 1,752

1,881 1,854 2,127

198 181

206 163

161

161 172

199 186

155 726 610

493 438

393

442 516

443 487

472

89 138

152

123

120

93 64

61 88

85 2761 2797

3009

2806

2248 2434

2504 2584 2615

2839

0

500

1,000

1,500

2,000

2,500

3,000

3,500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


223

BGC (Including Damages)

SERVICE



104 112

164

109 85 86 76

124

92

128

10 8

7

8

5 2 11

17

5

9 60

65

48

37

24 22 34

42

23

23

29 36

28

20

13 10 11

12

13

14

203 221

247

174

127 120 132

195

133

174

0

100

200

300

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


224

EGC (Including Damages)

SERVICE



198

304

213 212

279 288 306 290

326 290

5

6

13 8

14 11

13 7

5

2

27

35

38 22

5 18

25

16

19

21

3

4

1

1

0 1

4

0

0

8

233

349

265 243

298 318

348

313

350

321

0

100

200

300

400

500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


225

CAPE (Including Damages)

SERVICE



171 203

180

118 106 102 116

168 157 165

20

10

8

7 7

1

10

10 12 8

31

44

33

25

11 20

22

38

14 33

28

23

26

20

11 15

13

15

15

25

250

280

247

170

135 138

161

231 198

231

0

100

200

300

400

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


226

LOWELL (Including Damages)

SERVICE



2,465 2,221

2,487 2,715

2,521 2,044 2,214

2,463 2,429 2,710

233

205

234

186

187 175 206

233 208

174 844

754

612

522

433

502 597

539 543

549

149

201 207

164

144

119 92

88 116 132

3,447 3,647 3,768

3,393

2,808 3,010

3,145 3,323 3,296

3,565

0

1,000

2,000

3,000

4,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


227

MA (Including Damages)

SERVICE



535

845

587 535

422

543 604

477 443 488

15

27

19 29

31

21

39

17 30

30

86

112

84 76

83

105

155

68 126 127

44

35

18 37

31

53

39

2 2

9

680

1,019

708 677

567

722

837

564 601

654

0

300

600

900

1,200

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


228

RI (Including Damages)

SERVICE




229

US NGrid SERVICE

5,050 5,423 5,531 5,396 4,750

5,327 5,954 6,197

5,474 5,878

498 508 506 488

465

455

582 567

570 505

1,856 1,907 1,644 1,548

1,334

1,425

1,731 1,484

1,525 1,471

512 550

522 553

500

518

499 652

605

536 7,916 8,388 8,203 7,985

7,049

7,725

8,766 8,900

8,174 8,390

0

3,000

6,000

9,000

12,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er

of

Leak

s

Years

Type 3

Type 2

Type 2A

Type 1


(Including Damages)


230

2008 -2017 SERVICE LEAK REPAIRS

All Service Leak Repairs by Material

(Excluding Damages) NUMBER OF SVC

LEAK REPAIRS

YEAR

192 213 195 253 222 353

511 390

250 228

98 111 112 139

126

254

450

470

263 337 101 70 101

118 108

191

265

279

301 344

112 126 154

208

125

228

373

358

248

266

503 520 562

718

581

1,026

1,599

1,497

1,062

1,175

0

500

1000

1500

2000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

NYC

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron


231



(Excluding Damages)

0 0 0 0 0 0 0 0 0 0

1,210 1,024

1,024 998 1,063

1,063 997 967 877

718

282 213

206

306 236

247 278

240

188

190

261 212

223

239 279

182

171 180

397

504

12 17

11

18 28

30

29 28

32 31

1,489 1,466 1,387

1,561 1,606

1,394 1,475

1,415 1,494

1,443

0

500

1,000

1,500

2,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LI

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron

NUMBER OF SVC

LEAK REPAIRS

YEAR


232



(Excluding Damages)

6 12 30 13 8 8 24 40 17 5

307 270 268 269 212 197

236

311

190 134

147 174 204 266

189 224

314

409

317

297

138 216

300 217

173 155

250

341

236

186

19

12

28 20

23 21

13

28

22

31

44

0

670

812

874

785

605 605

837

1,129

782

653

0

300

600

900

1,200

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

UPSTATE Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron

YEAR

NUMBER OF SVC

LEAK REPAIRS


233



(Excluding Damages)

YEAR

NUMBER OF SVC

LEAK REPAIRS

6 12 30 13 8 8 24 40 17 5

1,433 1,507 1,410 1,520 1,497 1,485 1,744 1,668

1,317 1,080

527 498 522

711 551

725

1,042 1,119

768

824

500 498 624

574

560 528

686 800

934 1,034

143 155 193

246

176

279

415 414

302 328

53 128 44 2,662

2,798 2,823

3,064

2,792

3,025

3,911 4,041

3,338 3,271

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

NY State Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron


234



(Excluding Damages)

18 17 17 16 12 18 23 18 16 42

1,556 1,621 1,592 1,465

1,147 1,288

1,457 1,435 1,452 1,577

192 215

175

159

137

155

163 214 216

199

359

401 408

316

306

355

350 392

488

603 83

83 74

99

82

141

85

139 77

103

314 264

282

326

155

48

16

8

35

2,522 2,601

2,548

2,381

1,839

2,005 2,094

2,206 2,249

2,559

0

700

1,400

2,100

2,800

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

BGC

Other

Copper

Plastic

Coated Steel

Bare Steel

Cast Iron

YEAR

NUMBER OF SVC

LEAK REPAIRS


235



(Excluding Damages)

1 2 1

54

74 54 60

36 42 43 39 39

60

33

26

12 17

9 15

27 26 23

11

31

32

71

13

23

27

29

56 52

74 1

0 72

80 77

64

37 4

1

1

190

212 215

154

105

88

100

124 115

146

0

50

100

150

200

250

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

EGC Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron

YEAR

NUMBER OF SVC

LEAK REPAIRS


236



(Excluding Damages)

1 1

29 34 32 11

27 24 26 12 19 10

25

57

26

27

49

100 113

77

94 84

76

90

40

35

47

80

84

104

122

128 48

134

72

72

81

10

1 5

178

315

170

145

204 214

225

193

235 228

0

50

100

150

200

250

300

350

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

CAPE

Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron

YEAR

NUMBER OF SVC

LEAK REPAIRS


237



(Excluding Damages)

1 1 1 1

39 58 54

29 37 36 35 49

31 33

54

50 47

26

32

56 66

91

84 95

35

41 34

31 15

13

25

42

44

50

1

1 46

80

54

52

23

2

1

175

230

190

139

107 107

126

183

159

180

0

50

100

150

200

250

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

LOWELL

Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron

YEAR

NUMBER OF SVC

LEAK REPAIRS


238



(Excluding Damages)

18 17 19 17 12 18 24 21 16 45

1,683 1,787 1,732 1,565

1,247 1,390

1,561 1,568 1,541 1,680

304 348

260

229

227

326

369 408 417 389

501

564 553

395

391

475

488 594 706

855 84

84

74

99

82

141

85

139 78

103

480

558

485

514

296

64 18

9

41 3,070

3,358

3,123

2,819

2,255 2,414

2,545

2,739 2,758

3,113

0

1,000

2,000

3,000

4,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

MA Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron

YEAR

NUMBER OF SVC

LEAK REPAIRS


239



(Excluding Damages)

1

1 11 6 2 4

338

593

407 390 402

534

642

350 403

448

48

69

44 36 26

40

33

24

29

33 198

323

186 192

46

55

92

78

76 64

19

16

11 19

14

6

1

1

605

1,002

649 638

499

642

768

452

510 553

0

300

600

900

1,200

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

RI

Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron

YEAR

NUMBER OF SVC

LEAK REPAIRS


240



(Excluding Damages)

YEAR

NUMBER OF SVC

LEAK REPAIRS

24 30 49 31 31 32 48 61 35 54

3,454 3,887

3,549 3,475 3,146

3,409

3,947 3,586

3,261 3,208

879

915

826 976

804

1,091

1,444

1,551

1,214 1,246

1,199

1,385

1,363 1,161

997

1,058

1,266 1,472

1,716 1,953 229

239

268 345

259

421

500 553

380 434

552

702

540 533

310

70

19 9

42 6,337

7,158

6,595 6,521

5,547

6,081

7,224 7,232

6,606 6,937

0

2,000

4,000

6,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

US NGrid

Other

Copper

Plastic

Coated

Steel

Bare Steel

Cast Iron


23

4

4

23

7

12

2

24

8

2

1

24

1

11

17

9

9

0

24

5

0 14

20

9

11

15

5

17

0

28

6

0

39

23

6

8

16

3

27

1

37

0

0

76

23

8

6

12

1

31

0

27

1

0

37

34

2

30

19

1

41

4

47

2

0

13

7

48

1

80

18

6

38

2

80

8

0

19

0

32

8

78

23

6

42

2

92

9

0

11

8

25

6

27

22

0

51

6

72

2

0

0

28

8

45

23

7

60

2

77

4

6

0

0

200

400

600

800

1000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

241

SERVICE LEAKS REPAIRED


LEAK REPAIRS


NYC


86

3

9

48

0

21

29

50

3

3

61

90

6

16

40

3

13

18

42

1

0

92

87

3

17

44

2

12

6

40

7

1

71

97

6

14

43

7

8 20

49

6

0

47

97

0

10

0

45

9

12

14

44

6

0

69

86

1

13

48

6

15

12

42

1

0

72

95

0

11

45

0

9 2

9

42

2

0

54

84

5

5

45

9

15

16

46

8

0

66

84

9

4

44

9

22

19

57

8

1 2

1

82

0

3

39

1

18

24

56

5

2 11

0

300

600

900

1200


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

242



LEAK REPAIRS


LI


39

6

14

41

0

38

42

8

0

17

2

34

6

48

34

2

36

17

11

0

35

4

36

7

28

30

7

31

11

0

26

0

31

2

38

4

49

25

1

35

51

18

0

24

8

28

4

16

30

2

33

23

15

4

3

11

9

27

2

20

29

1

9 16

17

4

0

11

4

32

1

16

23

7

10

16

29

3

0

18

1

44

4

27

27

8

20

27

40

0

0

21

0

31

8

46

27

0

22

27

25

8

0

11

1

32

4

33

27

2

19

25

20

0

1

51

0

50

100

150

200

250

300

350

400

450

500


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

243



LEAK REPAIRS


UPSTATE


1,4

93

27

1,1

27

71

73

75

9

5

23

4

1,4

93

75

92

4

58

35

67

7

0

46

0

1,4

49

56

90

4

60

11

6

71

9

1

42

2

1,5

96

71

85

1

70

72

88

4

0

37

1

1,4

92

12

2

88

2

76

37

87

1

3

22

5

1,4

75

63

96

8

65

32

1,0

67

0

32

3

1,7

52

10

7

87

3

57

47

1,5

23

0

42

5

1,6

17

11

0

97

3

77

45

1,7

97

0

39

4

1,4

23

77

93

9

95

52

1,5

58

1

13

2

1,4

32

81

90

0

97

51

1,5

39

9 6

2

0

200

400

600

800

1000

1200

1400

1600

1800

2000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

244



LEAK REPAIRS


NY-STATE


245



LEAK REPAIRS


BGC 1

,18

7

44

1

23

4

58

16

5

61

10

60

5

1,2

81

41

2

19

6

79

16

1

55

6

60

7

1,4

66

13

1

46

1

15

12

6

59

3

1

21

6

1,3

64

12

7

42

5

19

21

72

7

0

12

3

1,1

43

52

40

9

23

30

51

1

1

80

1,0

70

10

1

42

9

18

11

2

58

0

1

12

3

1,1

79

24

6

41

0

5 31

46

6

2

16

5

1,2

84

16

1

37

8

16

30

59

0

1

12

4

1,0

89

10

9

36

6

16

44

59

2

3

39

6

1,6

37

30

28

0

16

13

69

6

1

16

6

0

400

800

1200

1600

2000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017


78

2

13

5

12

5

1

87

11

7

3

9

3

11

11

0

67

67

3

32

2

66

66

0

11

76

4

20

1 2

63

0

8

42

0

22

0

8

48

0

7

41

1

32

2

2

39

0 3

45

2

32

0 4

43

0

6

81

9

38

2

0

61

1 3

42

0

18

0

0

63

0

10

58

1

28

0 3

81

0 3

0

30

60

90

120

150


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

246



LEAK REPAIRS


EGC


10

4

8

55

6

4

19

1

36

15

5

4

34

0

14

23

5

11

4

61

0

95

1 7

88

2

11

34

2

98

1

0

96

0

12

45

3

94

7

2

14

0

1

12

34

5

10

4

5

1

16

3

0 6

32

1

12

3

0 8

18

2

0 2

23

7

12

0

0 3

15

8

0 2

34

2

11

5

0

0

19

4

0 5

31

0

93

1 3

17

6

0

17

0

50

100

150

200

250


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

247



LEAK REPAIRS


CCC


62

8

75

7

16

8

2

72

10

3

14

50

8 1

0

8

0

87

93

1

57

2

17

62

0

15

41

3

31

2 3

82

0

8

63

1

28

4

1

37

0 1

57

0

31

1 3

46

0

0

49

4

35

0

0

68

1 4

74

9

48

0 1

97

0 2

52

0

39

2

1

99

0

5

74

0

51

0

0

10

2

0 4

0

30

60

90

120


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

248



LEAK REPAIRS


CLW


249



LEAK REPAIRS


MA 1

,43

1

45

9

37

7

76

19

7

93

14

80

0

1,6

56

43

3

28

9

90

19

6

97

11

87

5

1,6

87

13

5

64

5

20

21

6

80

9

3

25

3

1,5

15

13

6

57

4

23

26

96

8

0

15

1

1,2

93

56

55

3

34

41

73

6

2

10

0

1,2

02

10

7

59

6

26

11

8

82

8

1

13

2

1,3

05

25

3

60

0

5 4

3

75

9

3

17

7

1,4

62

18

6

58

4

18

34

90

6

2

13

1

12

17

11

1

53

8

18

45

94

8

3

41

6

18

00

31

45

2

17

19

10

55

1

19

0

0

500

1000

1500

2000


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017


42

2

5

75

2 3

62

1

11

0

55

0

0 1

7

0

0

25

0

42

7

22

5

3

59

0 4 1

5

0

40

2

33

1

24

39

1

0

57

0

22

5

30

0

8

67

1 3

70

0

14

8

36

0

5

80

1 1

5

79

0

18

2

59

7

8

70

5 13

11

0

0

35

33

2

7

11

2

6

4

99

0 4

39

5

1

91

10

2

96

0 6

46

0

2

10

1

10

2

74

0 5

0

100

200

300

400

500

600

700


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

250



LEAK REPAIRS


RI


251



LEAK REPAIRS


NGRID 3

,34

6

49

1

1,5

79

14

9

27

3

91

4

20

1,1

44

3,6

99

50

8

1,2

30

14

8

23

1

79

9

11

1,7

62

3,3

61

19

4

1,6

08

80

33

6

1,5

43

4

1,0

77

3,4

42

23

1

1,4

64

94

98

1,9

09

0

74

7

3,0

85

18

6

1,5

02

11

1

81

1,6

77

5

47

3

3,0

37

17

5

1,6

44

92

16

5

1,9

74

1

63

7

3,6

54

36

8

1,5

43

67

10

3

2,3

92

3

63

7

3,4

11

30

3

1,6

69

10

1

83

2,8

02

2

52

9

3,0

35

18

9

1,5

68

12

3

99

2,6

02

4

55

4

3,6

92

11

4

1,4

53

12

4

72

2,6

68

10

25

7

0

900

1800

2700

3600

4500


Material orWelds


LEAK CAUSE

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017


252

TOTAL SERVICE LEAK “RATES”

INCLUDING Damages

1.32 1.25 1.27

1.56

1.23

2.14

3.14 3.05

2.26 2.48

3.91 3.68 3.56

3.86 3.96

3.56 3.59 3.46

3.57

3.35

2.02 2.15 2.18

1.90

1.65

1.62

1.93

2.52

1.87

1.64

0.0

2.0

4.0

6.0

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17

LEAK REPAIRS PER 1000 SERVICES

YEAR

NYC

LI

UPSTATE

NY-STATE


253


INCLUDING Damages

5.70 5.80

6.20

5.80

4.60

5.00 5.10 5.20 5.20

5.60

5.00 5.40

6.00

4.20

3.00

2.80

3.10

4.40

2.70

3.34

2.20

3.30

2.50 2.30

2.70

2.90

3.10

2.70

3.00

2.73

3.4

3.8

3.4

2.3

1.8 1.9 2.1

3.0

2.6

3.0

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17


YEAR

BGC

EGC

Cape

Lowell

MA


254


INCLUDING Damages

3.6

5.4

3.8 3.6

3.0

3.7

4.3

2.9 3.1

3.3

0.0

2.0

4.0

6.0

8.0

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17


YEAR

RI

RI


255


INCLUDING Damages

2.4 2.3 2.3 2.4

2.2 2.4

2.9

3.0

2.5 2.5

4.9 5.2

5.4

4.8

4.0 4.2

4.3 4.5 4.4

4.7

3.6

5.4

3.8 3.6

3.0 3.7

4.3

2.9

3.1 3.3 3.2 3.4 3.3 3.2 2.8

3.0

3.4 3.4 3.1

3.2

0.0

2.0

4.0

6.0

8.0

'08 '09 '10 '11 '12 '13 '14 '15 '16 '17


YEAR

NY

State

MA

RI

US-

NGrid

US-NGrid


256

SERVICE LEAK “RATES”




2.3

9

8.8

5

0.8

7

7.2

3

8.0

6

1.1

7

1.9

4

3.1

0

0.4

6

11

.99

0

5

10

15

20

COPPER ALL STEEL PLASTIC CI / WI

MATERIAL

NYC

LI

UPSTATE

LEAK REPAIRS

PER 1000 SERVICES


257





LEAK REPAIRS

PER 1000 SERVICES

12

.07

13

.86

2.0

9

30

.70

0.0

0

7.9

5

2.2

4

0.0

0

0.0

0

4.3

7

1.4

9

0.0

0

0.0

0

5.2

9

0.9

7

0.0

0

0

5

10

15

20

25

30

35


MATERIAL

BGC

EGC

CAPE

LOWELL


258





15.63

9.18

0.45

31.01

0

5

10

15

20

25

30

35


MATERIAL

RI

LEAK REPAIRS

PER 1000 SERVICES


259




US-NGrid EXCLUDING Damages

2.5

0 6

.04

0.8

4

11

.99

12

.07

11

.32

1.8

6

32

.44

15

.63

9.1

8

0.4

5

31

.01

0

5

10

15

20

25

30

35


MATERIAL

NY State

MA

RI

LEAK REPAIRS

PER 1000 SERVICES


260

LPP Main Replacement

Gas Meter Purchases


NYS – KEDNY, KEDLI & NMPC

261


NE - MA & RI

262


0

2000

4000

6000

8000

10000

12000

14000

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

FY14 FY15 FY16 FY17 FY18

No.

Small Dia - Residential

Large Dia - Commercial

Rotary - Commercial

Turbine - Commercial

263

GAS METER PURCHASES

(by Fiscal Year ) NYC


0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

0

5,000

10,000

15,000

20,000

25,000

30,000


Fiscal Year

No.



Rotary - Commercial


264

GAS METER PURCHASES

(by Fiscal Year ) LI


0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

0

5,000

10,000

15,000

20,000

25,000

30,000


Fiscal Year

No.



Rotary - Commercial


265

GAS METER PURCHASES

(by Fiscal Year ) UNY


0

5

10

15

20

25

30

35

40

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000


Fiscal Year

No.



Rotary - Commercial


266

GAS METER PURCHASES

(by Fiscal Year ) BGC


0

1,000

2,000

3,000

4,000

5,000

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000


Fiscal Year

No.



Rotary - Commercial


267

GAS METER PURCHASES

(by Fiscal Year ) CGC

Note - FY14 no data available for Small diameter


0

1,000

2,000

3,000

4,000

5,000

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000


Fiscal Year

No.



Rotary - Commercial


268

GAS METER PURCHASES

(by Fiscal Year ) RI


0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000


No.

NY

MA

RI

269

GAS METER PURCHASES

(by Fiscal Year )

US-NGrid

Fiscal Year

Note – Above graph shows the total of Residential and Commercial data combined.


270

2016/2017

DISTRIBUTION

DOT REPORT

DATA COMPARISONS


271 Data Shown Includes Filed Revisions

General Data Correction

Explanation Needed

Discussed & Approved

Delta(17-16) % Delta(17-16) % Delta(17-16) % Delta(16-15)

Cast Iron 1,355 miles 1,413 miles -58 -4% 260 miles 276 miles -16 -6% 406 miles 453 miles -47 -10% 2,021 miles 2,142 miles -121

Reconditioned Cast Iron 2 miles 0 miles 2 N/A 1 miles 0 miles +1 N/A 0 miles 0 miles 0 N/A 3 miles 0 miles 3

Plastic 1,325 miles 1,241 miles +84 7% 3,763 miles 3,603 miles +160 4% 4,643 miles 4,544 miles +99 2% 9,731 miles 9,388 miles +343

UP Bare Steel 324 miles 318 miles +6 2% 2,229 miles 2,305 miles -76 -3% 53 miles 55 miles -2 -4% 2,606 miles 2,678 miles -72

UP Coated Steel 0 miles 0 miles +0 0% 784 miles 787 miles -3 0% 159 miles 163 miles -4 -2% 943 miles 950 miles -7

Total UP Steel 324 miles 318 miles 5.91 2% 3,013 miles 3,092 miles -79 -3% 212 miles 218 miles -6 -3% 3,549 miles 3,628 miles -79

CP Bare Steel 0 miles 0 miles +0 0% 40 miles 40 miles +0 0% 0 miles 0 miles +0 0% 40 miles 40 miles +0

CP Coated Steel 1,135 miles 1,145 miles -10 -0.9% 1,107 miles 1,102 miles +5 0.5% 3,522 miles 3,530 miles -8 -0.2% 5,764 miles 5,777 miles -13

Total CP Steel 1,135 miles 1,145 miles -10 -1% 1,147 miles 1,142 miles 5 0% 3,522 miles 3,530 miles -8 0% 5,804 miles 5,817 miles -13

Other 0 miles 0 miles +0 0% 0 miles 0 miles +0 0% 0 miles 0 miles +0 0% 0 miles 0 miles +0

Ductile Iron 0 miles 0 miles +0 0% 0 miles 0 miles +0 0% 0 miles 0 miles +0 0% 0 miles 0 miles +0

TOTAL MAIN 4,141 miles 4,118 miles +23 0.6% 8,184 miles 8,113 miles +71 0.9% 8,783 miles 8,745 miles +38 0.4% 21,108 miles 20,976 miles +132

Corrosion 167 repairs 171 repairs -4 -2% 572 repairs 640 repairs -68 -11% 77 repairs 83 repairs -6 -7% 816 repairs 894 repairs -78

Natural Forces 101 repairs 111 repairs -10 -9% 73 repairs 75 repairs -2 -3% 90 repairs 74 repairs +16 22% 264 repairs 260 repairs +4

Excavation 39 repairs 36 repairs +3 8% 78 repairs 84 repairs -6 -7% 30 repairs 48 repairs -18 -38% 147 repairs 168 repairs -21

Other Outside Force 5 repairs 9 repairs -4 600% 9 repairs 2 repairs +7 350% 3 repairs 4 repairs -1 N/A 17 repairs 15 repairs +2

Material or Welds 0 repairs 0 repairs +0 #DIV/0! 35 repairs 37 repairs -2 -5% 6 repairs 10 repairs -4 -40% 41 repairs 47 repairs -6

Equipment 140 repairs 137 repairs +3 2% 218 repairs 343 repairs -125 -36% 49 repairs 107 repairs -58 -54% 407 repairs 587 repairs -180

Operations 0 repairs 0 repairs +0 0% 6 repairs 1 repairs +5 0% 0 repairs 0 repairs +0 0% 6 repairs 1 repairs +5

Other 2,786 repairs 2,710 repairs +76 3% 100 repairs 117 repairs -17 -15% 274 repairs 375 repairs -101 -27% 3,160 repairs 3,202 repairs -42

TOTAL MAIN LEAKS 3,238 repairs 3,174 repairs +64 2% 1,091 repairs 1,299 repairs -208 -16% 529 repairs 701 repairs -172 -25% 4,858 repairs 5,174 repairs -316

Copper 111,065 svcs 115,291 svcs -4226 -4% 4,290 svcs 4,973 svcs -683 -14% 15,939 svcs 16,501 svcs -562 -3% 131,294 svcs 136,765 svcs -5471

Plastic 393,930 svcs 385,825 svcs +8105 2% 430,006 svcs 421,376 svcs +8630 2% 408,725 svcs 401,394 svcs +7331 2% 1,232,661 svcs 1,208,595 svcs +24066

UP Bare Steel 26,896 svcs 29,038 svcs -2142 -7% 31,082 svcs 31,180 svcs -98 0% 28,535 svcs 30,522 svcs -1987 -7% 86,513 svcs 90,740 svcs -4227

UP Coated Steel 0 svcs 0 svcs +0 0% 46,919 svcs 51,617 svcs -4698 -9% 95,588 svcs 98,017 svcs -2429 -2% 142,507 svcs 149,634 svcs -7127

Total UP Steel 26,896 svcs 29,038 svcs -2142.00 -7% 78,001 svcs 82,797 svcs -4796 -6% 124,123 svcs 128,539 svcs -4416 -3% 229,020 svcs 240,374 svcs -11354.000

CP Bare Steel 0 svcs 0 svcs +0 0% 12,743 svcs 13,001 svcs -258 -2% 0 svcs 0 svcs +0 0% 12,743 svcs 13,001 svcs -258

CP Coated Steel 36,955 svcs 37,889 svcs -934 -2% 21,885 svcs 22,027 svcs -142 -1% 14,710 svcs 14,167 svcs +543 4% 73,550 svcs 74,083 svcs -533

Total CP Steel 36,955 svcs 37,889 svcs -934.00 -2% 34,628 svcs 35,028 svcs -400 -1% 14,710 svcs 14,167 svcs +543 4% 86,293 svcs 87,084 svcs -791.000

Other 0 svcs 0 svcs +0 0% 0 svcs 0 svcs +0 0% 0 svcs 0 svcs +0 0% 0 svcs 0 svcs +0

Cast Iron / Wrought Iron 0 svcs 0 svcs +0 0% 0 svcs 0 svcs +0 0% 417 svcs 862 svcs -445 -52% 417 svcs 862 svcs -445

TOTAL SERVICES 568,846 svcs 568,043 svcs +803 0.1% 546,925 svcs 544,174 svcs +2751 0.5% 563,914 svcs 561,463 svcs +2451 0.4% 1,679,685 svcs 1,673,680 svcs +6005

Corrosion 288 repairs 256 repairs +32 13% 820 repairs 853 repairs -33 -4% 323 repairs 318 repairs +5 2% 1,431 repairs 1,427 repairs +4

Natural Forces 45 repairs 27 repairs +18 67% 3 repairs 4 repairs -1 -25% 30 repairs 46 repairs -16 -35% 78 repairs 77 repairs +1

Excavation 237 repairs 220 repairs +17 8% 391 repairs 445 repairs -54 -12% 272 repairs 270 repairs +2 1% 900 repairs 935 repairs -35

Other Outside Force 60 repairs 51 repairs +9 18% 18 repairs 23 repairs -5 -22% 1 repairs 23 repairs -22 -96% 79 repairs 97 repairs -18

Material or Welds 2 repairs 6 repairs -4 -67% 24 repairs 20 repairs +4 20% 21 repairs 29 repairs -8 -28% 47 repairs 55 repairs -8

Equipment 774 repairs 722 repairs +52 7% 565 repairs 580 repairs -15 -3% 196 repairs 254 repairs -58 -23% 1,535 repairs 1,556 repairs -21


Other 0 repairs 0 repairs +0 #DIV/0! 11 repairs 17 repairs -6 -35% 37 repairs 113 repairs -76 -67% 48 repairs 130 repairs -82

TOTAL SVC LEAKS 1,412 repairs 1,282 repairs +130 10% 1,834 repairs 1,943 repairs -109 -6% 881 repairs 1,053 repairs -172 -16% 4,127 repairs 4,278 repairs -151

Corrosion 288 repairs 256 repairs +32 13% 820 repairs 853 repairs -33 -4% 324 repairs 319 repairs +5 2% 1,432 repairs 1,428 repairs +4

Natural Forces 45 repairs 27 repairs +18 67% 3 repairs 4 repairs -1 -25% 34 repairs 49 repairs -15 -31% 82 repairs 80 repairs +2

Excavation 237 repairs 220 repairs +17 8% 391 repairs 445 repairs -54 -12% 272 repairs 290 repairs -18 -6% 900 repairs 955 repairs -55

Other Outside Force 60 repairs 51 repairs +9 18% 18 repairs 23 repairs -5 -22% 19 repairs 24 repairs -5 -21% 97 repairs 98 repairs -1

Material or Welds 2 repairs 6 repairs -4 -67% 24 repairs 20 repairs +4 20% 24 repairs 29 repairs -5 -17% 50 repairs 55 repairs -5

Equipment 774 repairs 722 repairs +52 7% 565 repairs 582 repairs -17 -3% 198 repairs 265 repairs -67 -25% 1,537 repairs 1,569 repairs -32


Other 0 repairs 0 repairs +0 #DIV/0! 11 repairs 17 repairs -6 -35% 53 repairs 113 repairs -60 -53% 64 repairs 130 repairs -66

TOTAL SVC LEAKS 1,412 repairs 1,282 repairs +130 10% 1,834 repairs 1,945 repairs -111 -6% 925 repairs 1,089 repairs -164 -15% 4,171 repairs 4,316 repairs -145

4,650 repairs 4,456 repairs +194 4% 2,925 repairs 3,242 repairs -317 -10% 1,410 repairs 1,754 repairs -344 -20% 8,985 repairs 9,452 repairs -467

4,650 repairs 4,456 repairs +194 4% 2,925 repairs 3,244 repairs -319 -10% 1,454 repairs 1,790 repairs -336 -19% 9,029 repairs 9,490 repairs -461

8 leaks 23 leaks -15 -65% 0 leaks 0 leaks +0 #DIV/0! 8 leaks 21 leaks -13 0% 16 leaks 44 leaks -28

0.002 11% 0.01 21% 3.20% -533% -0.30%

45.0 ft 45.0 ft +0 0% 65.0 ft 65.0 ft +0 0% 72.9 ft 73.0 ft -0.1 0% 60.9 ft 60.9 ft -0.02

2016 - 2017 DOT Comparisons

Main Inventory

Main Leaks

Service Inventory

Service Leaks

Excluding Above

Ground Leaks

Service Leaks

Including Above

Ground Leaks

UFG (Net)

Average Service Length (Ft)

NYC2017 2016

2.0% 1.8%

LI2017 2016

4.0% 3.3%

Upstate2017 2016

2.6% -0.6%

NY State2017 2016

2.4% 2.7%

Total Leak Repairs (Main & Service)

Excluding Above Ground Leak Total Leak Repairs (Main & Service)

Including Above Ground Leak Workable Backlog As of 12/31




Explanation Needed


Delta(17-16) % Delta(17-16) % Delta(17-16) % Delta(17-16) % Delta(16-15) %

Cast Iron 1,768 miles 1,834 miles -66 -3.6% 73 miles 76 miles -3 -4.0% 0 miles 0 miles +0 N/A 90 miles 96 miles -6.009 -6.3% 1,930 miles 2,006 miles -75 -4%

Reconditioned Cast Iron 5 miles 5 miles +0 0.0% 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A 5 miles 5 miles +0 N/A

Plastic 2,533 miles 2,389 miles +145 6.1% 444 miles 440 miles +4 0.9% 1,738 miles 1,704 miles +34 2.0% 716 miles 693 miles +22.422 3.2% 5,431 miles 5,225 miles +205 4%

UP Bare Steel 651 miles 695 miles -44 -6.3% 9 miles 9 miles -0 0.0% 32 miles 44 miles -12 -27.0% 18 miles 19 miles -1 -5.3% 710 miles 768 miles -57 -7%

UP Coated Steel 436 miles 450 miles -14 -3.1% 9 miles 9 miles -0 0.0% 16 miles 21 miles -6 -28.3% 48 miles 51 miles -3 -5.9% 509 miles 532 miles -23 -4%

Total UP Steel 1,087 miles 1,145 miles -58 -5.1% 18 miles 19 miles -0 0.0% 48 miles 66 miles -18 -27.4% 66 miles 70 miles -4 -5.7% 1,219 miles 1,299 miles -80 -6%

CP Bare Steel 123 miles 125 miles -2 -1.6% 11 miles 12 miles -0 0.0% 8 miles 8 miles +0 0.0% 1 miles 1 miles +0 0.0% 143 miles 145 miles -2 -1%

CP Coated Steel 851 miles 863 miles -12 -1.4% 320 miles 320 miles -1 -0.3% 682 miles 699 miles -17 -2.4% 525 miles 535 miles -10 -1.9% 2,377 miles 2,417 miles -40 -1.7%

Total CP Steel 974 miles 988 miles -14 -1.4% 331 miles 332 miles -1 -0.3% 690 miles 707 miles -17 -2.4% 526 miles 536 miles -10 -1.9% 2,520 miles 2,562 miles -42 -2%

Other 0 miles 0 miles +0 0.0% 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A

Ductile Iron 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A 0 miles 0 miles +0 N/A

TOTAL MAIN 6,367 miles 6,360 miles +6 0.1% 866 miles 866 miles +0 0.0% 2,475 miles 2,476 miles -1 0.0% 1,397 miles 1,394 miles +3 0.2% 11,105 miles 11,097 miles +8 0.1%

Corrosion 1068 repairs 720 repairs +348 48.3% 12 repairs 35 repairs -23 -65.7% 48 repairs 62 repairs -14 -22.6% 64 repairs 32 repairs +32 100.0% 1,192 repairs 849 repairs +343 40%

Natural Forces 257 repairs 282 repairs -25 -8.9% 1 repairs 4 repairs -3 -75.0% 0 repairs 0 repairs +0 N/A 7 repairs 7 repairs +0 0.0% 265 repairs 293 repairs -28 -10%

Excavation 65 repairs 73 repairs -8 -11.0% 10 repairs 5 repairs +5 100.0% 26 repairs 23 repairs +3 13.0% 11 repairs 4 repairs +7 175.0% 112 repairs 105 repairs +7 7%

Other Outside Force 2 repairs 1 repairs +1 100.0% 1 repairs 0 repairs +1 N/A 0 repairs 0 repairs +0 N/A 0 repairs 0 repairs +0 N/A 3 repairs 1 repairs +2 200%

Material or Welds 6 repairs 19 repairs -13 -68.4% 0 repairs 0 repairs +0 N/A 3 repairs 1 repairs +2 200.0% 0 repairs 0 repairs +0 N/A 9 repairs 20 repairs -11 -55%

Equipment 447 repairs 307 repairs +140 45.6% 27 repairs 22 repairs +5 22.7% 7 repairs 7 repairs +0 0.0% 33 repairs 23 repairs +10 43.5% 514 repairs 359 repairs +155 43%

Operations 5 repairs 0 repairs +5 N/A 0 repairs 0 repairs +0 N/A 0 repairs 0 repairs +0 N/A 0 repairs 0 repairs +0 N/A 5 repairs 0 repairs +5 #DIV/0!

Other 5067 repairs 3,054 repairs +2013 65.9% 89 repairs 67 repairs +22 32.8% 2 repairs 6 repairs -4 N/A 71 repairs 21 repairs +50 238.1% 5,229 repairs 3,148 repairs +2081 66%

TOTAL MAIN LEAKS 6,917 repairs 4,456 repairs +2461 55.2% 140 repairs 133 repairs +7 5.3% 86 repairs 99 repairs -13 -13.1% 186 repairs 87 repairs +99 113.8% 7,329 repairs 4,775 repairs +2554 53%

Copper 8,534 svcs 8,828 svcs -294 -3.3% 0 svcs 0 svcs +0 0.0% 0 svcs 0 svcs +0 N/A 1 svcs 1 svcs +0 0.0% 8,535 svcs 8,829 svcs -294 -3%

Plastic 288,814 svcs 275,836 svcs +12978 4.7% 33,103 svcs 32,496 svcs +607 1.9% 86,137 svcs 83,688 svcs +2449 2.9% 51,348 svcs 49,651 svcs +1697 3.4% 459,402 svcs 441,671 svcs +17731 4%

UP Bare Steel 78,900 svcs 82,762 svcs -3862 -4.7% 3,650 svcs 3,798 svcs -148 -3.9% 1,424 svcs 1,557 svcs -133 -8.5% 1,538 svcs 1,681 svcs -143 -8.5% 85,512 svcs 89,798 svcs -4286 -5%

UP Coated Steel 19,973 svcs 21,135 svcs -1162 -5.5% 646 svcs 659 svcs -13 -2.0% 1,893 svcs 2,065 svcs -172 -8.3% 3,223 svcs 3,424 svcs -201 -5.9% 25,735 svcs 27,283 svcs -1548 -6%

Total UP Steel 98,873 svcs 103,897 svcs -5024 -4.8% 4,296 svcs 4,457 svcs -161 -3.6% 3,317 svcs 3,622 svcs -305 -8.4% 4,761 svcs 5,105 svcs -344 -6.7% 111,247 svcs 117,081 svcs -5834 -5%

CP Bare Steel 0 svcs 0 svcs +0 N/A 0 svcs 0 svcs +0 N/A 0 svcs 0 svcs +0 N/A 0 svcs 0 svcs +0 N/A 0 svcs 0 svcs +0 N/A

CP Coated Steel 29,271 svcs 30,358 svcs -1087 -3.6% 4,638 svcs 4,693 svcs -55 -1.2% 18,178 svcs 19,065 svcs -887 -4.7% 19,449 svcs 20,213 svcs -764 -3.8% 71,536 svcs 74,329 svcs -2793 -4%

Total CP Steel 29,271 svcs 30,358 svcs -1087 -3.6% 4,638 svcs 4,693 svcs -55 -1.2% 18,178 svcs 19,065 svcs -887 -4.7% 19,449 svcs 20,213 svcs -764 -3.8% 71,536 svcs 74,329 svcs -2793 -4%

Other 80,045 svcs 84,056 svcs -4011 -4.8% 10,059 svcs 7,419 svcs +2640 35.6% 9,743 svcs 9,833 svcs -90 -0.9% 1,966 svcs 1,661 svcs +305 18.4% 101,813 svcs 102,969 svcs -1156 -1%

Cast Iron / Wrought Iron 1,368 svcs 1,414 svcs -46 -3.3% 4 svcs 4 svcs +0 0.0% 15 svcs 16 svcs -1 -6.3% 0 svcs 0 svcs +0 N/A 1,387 svcs 1,434 svcs -47 -3%

TOTAL SERVICES 506,905 svcs 504,389 svcs +2516 0.5% 52,100 svcs 49,069 svcs +3031 6.2% 117,390 svcs 116,224 svcs +1166 1.0% 77,525 svcs 76,631 svcs +894 1.2% 753,920 svcs 746,313 svcs +7607 1.0%

Corrosion 1,637 repairs 1,089 repairs +548 50.3% 58 repairs 42 repairs +16 38.1% 31 repairs 34 repairs -3 -8.8% 74 repairs 52 repairs +22 42.3% 1,800 repairs 1,217 repairs +583 48%

Natural Forces 30 repairs 109 repairs -79 -72.5% 1 repairs 0 repairs +1 N/A 0 repairs 2 repairs -2 -100.0% 0 repairs 0 repairs +0 N/A 31 repairs 111 repairs -80 -72%

Excavation 297 repairs 366 repairs -69 -18.9% 28 repairs 18 repairs +10 55.6% 93 repairs 115 repairs -22 -19.1% 51 repairs 39 repairs +12 30.8% 469 repairs 538 repairs -69 -13%

Other Outside Force 16 repairs 16 repairs +0 0.0% 0 repairs 0 repairs +0 N/A 1 repairs 0 repairs +1 N/A 0 repairs 2 repairs -2 N/A 17 repairs 18 repairs -1 -6%

Material or Welds 13 repairs 44 repairs -31 -70.5% 3 repairs 0 repairs +3 N/A 3 repairs 0 repairs +3 N/A 0 repairs 1 repairs -1 N/A 19 repairs 45 repairs -26 -58%

Equipment 693 repairs 592 repairs +101 17.1% 81 repairs 63 repairs +18 28.6% 176 repairs 194 repairs -18 -9.3% 102 repairs 99 repairs +3 3.0% 1,052 repairs 948 repairs +104 11%

Operations 1 repairs 3 repairs -2 -66.7% 0 repairs 0 repairs +0 N/A 0 repairs 0 repairs +0 N/A 0 repairs 0 repairs +0 N/A 1 repairs 3 repairs -2 -67%

Other 166 repairs 396 repairs -230 -58.1% 3 repairs 10 repairs -7 -70.0% 17 repairs 5 repairs +12 240.0% 4 repairs 5 repairs -1 -20.0% 190 repairs 416 repairs -226 -54%

TOTAL SVC LEAKS 2,853 repairs 2,615 repairs +238 9.1% 174 repairs 133 repairs +41 30.8% 321 repairs 350 repairs -29 -8.3% 231 repairs 198 repairs +33 16.7% 3,579 repairs 3,296 repairs +283 9%

Corrosion 1637 repairs 1,089 repairs +548 50.3% 58 repairs 42 repairs +16 38.1% 31 repairs 34 repairs -3 -8.8% 74 repairs 52 repairs +22 42.3% 1,800 repairs 1,217 repairs +583 48%

Natural Forces 30 repairs 109 repairs -79 -72.5% 1 repairs 0 repairs +1 N/A 0 repairs 3 repairs -3 -100.0% 0 repairs 0 repairs +0 N/A 31 repairs 112 repairs -81 -72%

Excavation 280 repairs 366 repairs -86 -23.5% 28 repairs 18 repairs +10 55.6% 93 repairs 115 repairs -22 -19.1% 51 repairs 39 repairs +12 30.8% 452 repairs 538 repairs -86 -16%

Other Outside Force 16 repairs 16 repairs +0 0.0% 0 repairs 0 repairs +0 N/A 1 repairs 0 repairs +1 N/A 0 repairs 2 repairs -2 N/A 17 repairs 18 repairs -1 -6%

Material or Welds 13 repairs 44 repairs -31 -70.5% 3 repairs 0 repairs +3 N/A 3 repairs 0 repairs +3 N/A 0 repairs 1 repairs -1 N/A 19 repairs 45 repairs -26 -58%

Equipment 696 repairs 598 repairs +98 16.4% 83 repairs 63 repairs +20 31.7% 182 repairs 204 repairs -22 -10.8% 102 repairs 101 repairs +1 1.0% 1,063 repairs 966 repairs +97 10%

Operations 1 repairs 3 repairs -2 -66.7% 0 repairs 0 repairs +0 N/A 0 repairs 0 repairs +0 N/A 0 repairs 0 repairs +0 N/A 1 repairs 3 repairs -2 -67%

Other 166 repairs 396 repairs -230 -58.1% 3 repairs 10 repairs -7 -70.0% 17 repairs 5 repairs +12 240.0% 4 repairs 5 repairs -1 -20.0% 190 repairs 416 repairs -226 -54%

TOTAL SVC LEAKS 2,839 repairs 2,621 repairs +218 8.3% 176 repairs 133 repairs +43 32.3% 327 repairs 361 repairs -34 -9.4% 231 repairs 200 repairs +31 15.5% 3,573 repairs 3,315 repairs +258 8%

9,770 repairs 7,071 repairs +2699 38.2% 314 repairs 266 repairs +48 18.0% 407 repairs 449 repairs -42 -9.4% 417 repairs 285 repairs +132 46.3% 10,908 repairs 8,071 repairs +2837 35%

9,756 repairs 7,077 repairs +2679 37.9% 316 repairs 266 repairs +50 18.8% 413 repairs 460 repairs -47 -10.2% 417 repairs 287 repairs +130 45.3% 10,902 repairs 8,090 repairs +2812 35%

197 leaks 181 leaks +16 8.8% leaks 2 leaks -2 N/A leaks 1 leaks -1 N/A 2 leaks 0 leaks +2 N/A 199 leaks 184 leaks +15 8%

0.005 13% 0.30% 30% 0.50% 19% 1.80% 450% 0.80% 25%

46.8 ft 46.3 ft +0.54 1.2% 71.6 ft 75.5 ft -3.9 -5.2% 76.0 ft 75.6 ft +0.38 0.5% 71.8 ft 71.8 ft +0 0.0% 55.6 ft 55.4 ft +0.25 0.5%


Main Inventory

Main Leaks

Service Inventory

Service Leaks

Excluding Above

Ground Leaks

Service Leaks

Including Above

Ground Leaks

UFG (Net)


1.0% 3.2% 3.20%

CLW2017 2016

2.2% 0.4%

EGC2017 2016

4.0%

CCC2017 2016

2.7%1.3%

MA2017 2016

BGC2017 2016




4.3% 3.8%




Explanation Needed


Delta(17-16) % Delta(16-15) %

Cast Iron 730 miles 754 miles -24 -3% 4,681 miles 4,902 miles -220.499 -4%

Reconditioned Cast Iron 0 miles 0 miles 0 N/A 7 miles 5 miles 2.667 N/A

Plastic 1,476 miles 1,417 miles +59 4% 16,638 miles 16,031 miles +606.902 4%

UP Bare Steel 224 miles 242 miles -18 -7% 3,541 miles 3,688 miles -147.026 -4%

UP Coated Steel 171 miles 175 miles -4 -2% 1,623 miles 1,657 miles -33.989 -2%

Total UP Steel 395 miles 416 miles -22 -5% 5,163 miles 5,344 miles -181.015 -3%

CP Bare Steel 0 miles 0 miles +0 0% 183 miles 185 miles -1.859 -1%

CP Coated Steel 590 miles 590 miles -0.49 -0.1% 8,730 miles 8,784 miles -53.633 -0.6%

Total CP Steel 590 miles 590 miles 0 0% 8,913 miles 8,969 miles -55.492 -1%

Other 0 miles 0 miles -0.01 0% 0 miles 0 miles -0.006 -9%

Ductile Iron 16 miles 16 miles -0.3 -2% 16 miles 16 miles -0.304 -2%

TOTAL MAIN 3,205 miles 3,193 miles +12 0.4% 35,419 miles 35,266 miles +152.253 0.4%

Corrosion 102 repairs 85 repairs +17 20% 2,110 repairs 1,828 repairs +282 15%

Natural Forces 26 repairs 40 repairs -14 -35% 555 repairs 593 repairs -38 -6%

Excavation 16 repairs 16 repairs +0 0% 275 repairs 289 repairs -14 -5%

Other Outside Force 1 repairs 0 repairs +1 #DIV/0! 21 repairs 16 repairs +5 31%

Material or Welds 0 repairs 2 repairs -2 -100% 50 repairs 69 repairs -19 -28%

Equipment 58 repairs 46 repairs +12 26% 979 repairs 992 repairs -13 -1%

Operations 0 repairs 0 repairs +0 0% 11 repairs 1 repairs +10 1000%

Other 666 repairs 562 repairs +104 19% 9,055 repairs 6,912 repairs +2143 31%

TOTAL MAIN LEAKS 869 repairs 751 repairs +118 16% 13,056 repairs 10,700 repairs +2356 22%

Copper 192 svcs 201 svcs -9 -4% 140,021 svcs 145,795 svcs -5774 -4%

Plastic 142,956 svcs 140,206 svcs +2750 2% 1,835,019 svcs 1,790,472 svcs +44547 2%

UP Bare Steel 34,701 svcs 36,227 svcs -1526 -4% 206,726 svcs 216,765 svcs -10039 -5%

UP Coated Steel 8,268 svcs 8,579 svcs -311 -4% 176,510 svcs 185,496 svcs -8986 -5%

Total UP Steel 42,969 svcs 44,806 svcs -1837 -4% 383,236 svcs 402,261 svcs -19025 -5%

CP Bare Steel 0 svcs 0 svcs +0 0% 12,743 svcs 13,001 svcs -258 -2%

CP Coated Steel 9,456 svcs 9,585 svcs -129 -1% 154,542 svcs 157,997 svcs -3455 -2%

Total CP Steel 9,456 svcs 9,585 svcs -129 -1% 167,285 svcs 170,998 svcs -3713 -2%

Other 803 svcs 854 svcs -51 -6% 102,616 svcs 103,823 svcs -1207 -1%

Cast Iron / Wrought Iron 129 svcs 134 svcs -5 -4% 1,933 svcs 2,430 svcs -497 -20%

TOTAL SERVICES 196,505 svcs 195,786 svcs +719 0.4% 2,630,110 svcs 2,615,779 svcs +14331 0.5%


Natural Forces 2 repairs 1 repairs +1 100% 111 repairs 189 repairs -78 -41%

Excavation 101 repairs 91 repairs +10 11% 1,470 repairs 1,564 repairs -94 -6%

Other Outside Force 10 repairs 10 repairs +0 0% 106 repairs 125 repairs -19 -15%

Material or Welds 2 repairs 2 repairs +0 0% 68 repairs 102 repairs -34 -33%

Equipment 74 repairs 96 repairs -22 -23% 2,661 repairs 2,600 repairs +61 2%


Other 5 repairs 5 repairs +0 0% 243 repairs 551 repairs -308 -56%

TOTAL SVC LEAKS 654 repairs 601 repairs +53 9% 8,360 repairs 8,175 repairs +185 2%


Natural Forces 2 repairs 1 repairs +1 100% 115 repairs 193 repairs -78 -40%

Excavation 101 repairs 95 repairs +6 6% 1,453 repairs 1,588 repairs -135 -9%

Other Outside Force 13 repairs 10 repairs +3 30% 127 repairs 126 repairs +1 1%

Material or Welds 2 repairs 2 repairs +0 0% 71 repairs 102 repairs -31 -30%

Equipment 74 repairs 96 repairs -22 -23% 2,674 repairs 2,631 repairs +43 2%


Other 5 repairs 5 repairs +0 0% 259 repairs 551 repairs -292 -53%

TOTAL SVC LEAKS 657 repairs 605 repairs +52 9% 8,401 repairs 8,236 repairs +165 2%

1,523 repairs 1,352 repairs +171 13% 21,416 repairs 18,875 repairs +2541 13%

1,526 repairs 1,356 repairs +170 13% 21,457 repairs 18,936 repairs +2521 13%

74 leaks 68 leaks +6 9% 289 leaks 296 leaks -7 -2%

0 22% 0.2100% 9%

66.5 ft 66.0 ft +0.49 1% 59.8 ft 59.7 ft +0.091 0%


Main Inventory

Main Leaks

Service Inventory

Service Leaks

Excluding Above

Ground Leaks

Service Leaks

Including Above

Ground Leaks

UFG (Net)


2016

2.2% 1.8%

US - NGRID (ALL REGIONS COMBINED)2017 2016

2.6% 2.39%

RI2017





274

NATIONAL GRID-US

2017 GAS DISTRIBUTION

SYSTEM STATISTICS


275

CAUTION:

This chart is for comparative-illustrative purposes only. The data is not audited & many assumption have been made. Inventory data is from the Annual DOT/PHMSA Distribution Reports.

Customer data is from the Gas Customer Data base- Active Gas Accounts

Sendout data is from the sendouts for the 12-month period used to calculate UFG for the DOT Reports.

STATE LEGACY

Miles of

Main # of Services

Avg

Service

Length

(ft/svc)

Miles of

Services

TOTAL

Distribution

Pipeline

Residential

Customers

Commercial

and

Industrial

Customers

TOTAL

Customers

Sendout

(MDT)

NYC 4,141 568,846 45 4,848 8,989 1,189,385 72,689 1,262,074 201,774

LI 8,184 546,925 65 6,733 14,917 532,730 61,617 594,347 99,894

UPSTATE 8,783 563,914 73 7,786 16,569 568,454 47,061 615,515 121,345

ALL NEW YORK STATE 21,108 1,679,685 60.9 19,367 40,475 2,290,569 181,367 2,471,936 423,013

BOSTON 6,367 506,905 46.8 4,493 10,860 599,180 54,143 653,323 112,863

ESSEX 866 52,100 71.6 707 1,573 49,332 5,118 54,450 6,953

CAPE 2,475 117,390 76.0 1,690 4,165 105,467 9,722 115,189 11,631

LOWELL 1,397 77,525 71.8 1,054 2,451 84,511 9,436 93,947 14,494

ALL MASSACHUSETTS 11,105 753,920 55.6 7,943 19,048 838,490 78,419 916,909 145,941

RHODE ISLAND 3,205 196,505 66.5 2,475 5,680 241,126 25,048 266,174 41,489

TOTAL NGRID-US 35,418 2,630,110 59.8 29,785 65,203 3,370,185 284,834 3,655,019 610,443

2017 GAS DISTRIBUTION SYSTEM STATISTICS

2017 PIPELINE / CUSTOMER / SENDOUT STATISTICS


276

STATE LEGACY

% of

Main

% of

Service

s

% of

Distrib-

ution

Pipeline

% of

Custo-

mers

% of

Sendout

Service

Density

(Svcs /

Mile

Main)

Meter

Density

(Custo-

mers /

Service

)

Customer

Density

(Customers

/ Mile Total

Pipeline)

Main

Capacities

Used

(Sendout

MDT / Mile

Main)

Service

Capacities

Used

(Sendout

MDT/

Service)

Pipeline

Capacities

Used

(Sendout

MDT / Mile

Total Pipe)

Customer

Usage

(Sendout

MDT /

Customer)

NYC 11.7% 21.6% 13.8% 34.5% 33.1% 137 2.2 140.4 48.73 0.35 22.45 0.160

LI 23.1% 20.8% 22.9% 16.3% 16.4% 67 1.1 39.8 12.21 0.18 6.70 0.168

UPSTATE 24.8% 21.4% 25.4% 16.8% 19.9% 64 1.1 37.1 13.82 0.22 7.32 0.197

ALL NEW YORK STATE 59.6% 63.9% 62.1% 67.6% 69.3% 80 1.5 61.1 20.04 0.25 10.45 0.171

BOSTON 18.0% 19.3% 16.7% 17.9% 18.5% 80 1.3 60.2 17.73 0.22 10.39 0.173

ESSEX 2.4% 2.0% 2.4% 1.5% 1.1% 60 1.0 34.6 8.03 0.13 4.42 0.128

CAPE 7.0% 4.5% 6.4% 3.2% 1.9% 47 1.0 27.7 4.70 0.10 2.79 0.101

LOWELL 3.9% 2.9% 3.8% 2.6% 2.4% 55 1.2 38.3 10.38 0.19 5.91 0.154

ALL MASSACHUSETTS 31.4% 28.7% 29.2% 25.1% 23.9% 68 1.2 48.1 13.14 0.19 7.66 0.159

RHODE ISLAND 9.0% 7.5% 8.7% 7.3% 6.8% 61 1.4 46.9 12.95 0.21 7.30 0.156

TOTAL NGRID-US 100% 100% 100% 100% 100% 74 1.4 56.1 17.24 0.23 9.36 0.167

2017 GAS DISTRIBUTION SYSTEM STATISTICS

PERCENTAGES OF NGRID-US SYSTEM ASSET RATIOS GAS CONSUMPTION RATIOS


277

NOTES:

Leak-Prone Main includes Cast Iron/Wrought Iron, Unprotected Steel , Aldyl-A and Other Material.

Leak-Prone Service includes Cast Iron/Wrought Iron, Copper and Unprotected Steel.

STATE LEGACY

Leak -

Prone

Main

(miles)

% of

TOTAL

Main

Leak - Prone

Services (#)

% of

TOTAL

Services

Miles of

Leak -

Prone

Service

s

TOTAL

Leak -

Prone

Pipe (in

miles)

% of NG-

US Leak -

Prone

Main

(miles)

% of

NG-US

Leak -

Prone

Services

(#)

% of

NG-US

TOTAL

Leak -

Prone

Pipe

NYC 1,681 40.6% 137,961 24.3% 1,176 2,857 17.1% 26.3% 18.2%

LI 3,274 40.0% 82,291 15.0% 1,013 4,287 33.2% 15.7% 27.4%

UPSTATE 618 7.0% 140,062 24.8% 1,934 2,552 6.3% 26.7% 16.3%

ALL NEW YORK STATE 5,573 26.4% 360,314 21.5% 4,123 9,696 56.6% 68.7% 61.9%

BOSTON 2,860 44.9% 108,775 21.5% 964 3,824 29.0% 20.7% 24.4%

ESSEX 91 10.5% 4,300 8.3% 58 149 0.9% 0.8% 1.0%

CAPE 48 1.9% 3,332 2.8% 48 96 0.5% 0.6% 0.6%

LOWELL 156 11.2% 4,762 6.1% 65 221 1.6% 0.9% 1.4%

ALL MASSACHUSETTS 3,155 28.4% 121,169 16.1% 1,135 4,290 32.0% 23.1% 27.4%

RHODE ISLAND 1,124 35.1% 43,290 22.0% 545 1,669 11.4% 8.2% 10.7%

TOTAL NGRID-US 9,852 27.8% 524,773 20.0% 5,803 15,655 100% 100% 100%

SEPARATE LEAK-PRONE PIPE ANALYSIS

2017 LEAK-PRONE PIPE INVENTORY LEAK-PRONE PIPE %'s


278

NOTES:

TOTAL Leak Receipts (Main & Service) data excludes Excavation Leaks.

TOTAL Leak Repairs (Main & Service) data includes Excavation Leaks.

TOTAL Leak Repairs (Main & Service) data excludes Above Ground Leaks.

STATE LEGACY

TOTAL

Leak

Receipts

(Main &

Service)

TOTAL

Leak

Repairs

(Main &

Service)

Year-End

Workable

Leak

Backlog

TOTAL

Repairs +

Workable

Leaks

TOTAL

Leak

Receipts /

Mile TOTAL

Pipe

TOTAL

Leak

Receipts /

Mile Leak-

Prone Pipe

TOTAL

Leak

Repairs /

Mile TOTAL

Pipe

TOTAL

Leak

Repairs /

Mile Leak-

Prone Pipe

Repairs +

Workables

/ Mile

TOTAL

Pipe

Repairs +

Workable /

Mile Leak-

Prone Pipe

NYC 4,075 4,650 8 4,658 0.5 1.4 0.5 1.6 0.5 1.6

LI 3,292 2,925 - 2,925 0.2 0.8 0.2 0.7 0.2 0.7

UPSTATE 1,633 1,454 9 1,463 0.1 0.6 0.1 0.6 0.1 0.6

ALL NEW YORK STATE 9,000 9,029 17 9,046 0.2 0.9 0.2 0.9 0.2 0.9

BOSTON 7,018 9,756 193 9,949 0.6 1.8 0.9 2.6 0.9 2.6

ESSEX 233 314 1 315 0.1 1.6 0.2 2.1 0.2 2.1

CAPE 325 407 1 408 0.1 3.4 0.1 4.2 0.1 4.3

LOWELL 329 417 - 417 0.1 1.5 0.2 1.9 0.2 1.9

ALL MASSACHUSETTS 7,905 10,894 195 11,089 0.4 1.8 0.6 2.5 0.6 2.6

RHODE ISLAND 1,924 1,523 74 1,597 0.3 1.2 0.3 0.9 0.3 1.0

TOTAL NGRID-US 18,829 21,446 286 21,732 0.3 1.2 0.3 1.4 0.3 1.4

2017 LEAK DATA

LEAK AND REPAIR ANALYSIS

LEAK RATE RATIOS


279

2017 SYSTEM INTEGRITY

REPORT ANALYSIS

(FINDINGS AND

EXPLANATIONS)


ANALYSIS OF FINDINGS AND EXPLANATIONS FINDING 1: NYC Leak receipts have declined by 6% (265) in 2017 compared to 2016. MAIN - Main leak repairs increased by 2% (64) in 2017 compared to 2016. Cast Iron Joint leaks comprise 86% of

all main leaks. SERVICE – Service leak repairs increased by 10% (130) in 2017 compared to 2016. Equipment leaks comprise

55% of all service leaks. Total – Gas leak repairs increased by 4% (194) in 2017 LI Leak receipts have declined by 3% (88) in 2017 compared to 2016 MAIN - Main leak repairs decreased by 16% (207) in 2017 compared to 2016. Corrosion leaks comprise 52% of

all main leaks. SERVICE - Service leak repairs decreased by 6% (109) in 2017 compared to 2016. Corrosion leaks comprise 45%

of all service leaks. Total – Gas leak repairs decreased by 10% (316) in 2017 UPSTATE Leak receipts have declined by 0% (6) in 2017 compared to 2016 MAIN – Main leak repairs decreased by 25% (172) in 2017. Cast Iron Joint leaks comprise 52% of all main leaks. SERVICE - Service leak repairs decreased by 12% (127). Corrosion leaks comprise 35% of all service leaks. Total – Gas leak repairs decreased by 17% (299) in 2017

280


ANALYSIS OF FINDINGS AND EXPLANATIONS FINDING 2: BGC MAIN- Leak receipts have increased by 15% in 2017 compared to 2016, and the total Leak Repairs have increased by

42%. SERVICE- Leak rates increased by 8% compared to 2016 leak rate. Corrosion leaks increased by 50% of all service leaks. CCC MAIN- Leak receipts have declined by 4% in 2017 compared to 2016, and the total Leak Repairs have decreased by 9%. SERVICE- Leak rates decreased by 9% compared to 2016 leak rate. Equipment leaks comprise 9% of all service leaks. CLW MAIN- Leak receipts have increased by 9% in 2017 compared to 2016, and the total Leak Repairs have increased by

47%. SERVICE- Leak rates increased by 15% compared to 2016 leak rate. Equipment leaks increased by 3% of all service leaks. EGC MAIN- Leak receipts have declined by 10% in 2017 compared to 2016, but the total Leak Repairs have been increased

by 14%. SERVICE- Leak rates increased by 24% compared to 2016 leak rate. Equipment leaks increased by 28% of all service

leaks.

281


ANALYSIS OF FINDINGS AND EXPLANATIONS

282

MA experienced significant increase of leak receipts and repairs. GDE has been closely monitoring this matter since Sept 2017.

Inventory data shows a great reduction in CI and Un-protected Steel from 2016 to 2017.

MA experienced significant amount of Protected Coated steel main inventory reduction from 2013 to 2017.

In MA, from 2013 to 2017 data shows a significant decrease in cathodically protected coated steel main for the following reasons:

1. Protected main has been replaced due to municipality work, size increase or PSI

2.Protected pipe that is 1940-1960’s vintage and doesn’t have maintained CP, gets replaced through GSEP

3.Protected pipe that over time has interference issues with water or other utilities (has typically been Pre-DOT piping), we backed off CP on 2 systems in Acton in 2014

4.Mislabeled ArcFM data has gotten corrected. Typically the issues that are found and corrected are changes in material, coating or CP

5.The Pre-DOT program in MA has been on hold for a few years now, so we are not adding CP to unprotected CS.

Gas Distribution engineering will continue to monitor and coordinate this issue with Corrosion, Main & Service Replacement and mapping groups.


ANALYSIS OF FINDINGS AND EXPLANATIONS Follow up work on Riser Leak monitoring/analysis in Colonial Gas Cape. Gas Distribution Engineering has monitored and analyzed the last six years of data of equipment leaks in

Colonial Gas Cape. The total number of riser leaks has stayed consistent. Gas Distribution Engineering has also analyzed the geographical locations of riser leaks for the last six

years. The map below gives a good visual indication of how heavily concentrated in certain areas on the south shore of the Cape. This is due to the higher corrosivity of the soil.

283

PLYMOUTH

CARVER

BOURNE

MASHPEE

BREWSTER

SANDWICH

MARION

HATCHVILLE

CHATHAM

HYANNIS

COTUIT

HARWICH

WEST WAREHAM

WEST BARNSTABLE

EAST WAREHAM

DENNIS

BARNSTABLE

MATTAPOISETT

FALMOUTH

YARMOUTH

ROCHESTER

EAST SANDWICH

MARSTONS MILLS

MIDDLEBOROUGH

WEST YARMOUTH

ORLEANS

CENTERVILLE

EAST DENNIS

EAST FALMOUTH

WEST FALMOUTH

EAST HARWICH

EAST ORLEANS

OSTERVILLE

SOUTH EASTHAM

WAREHAM

POCASSET

WAREHAM

NORTH EASTHAM

SOUTH DENNIS

SOUTH YARMOUTH

SOUTH SANDWICH

CATAUMET

BUZZARDS BAY

FORESTDALE

CHATHAM

NORTH HARWICH

YARMOUTH PORT

NEW SEABURY

WAQUOIT

DENNISPORT

TEATICKET

NORTH FALMOUTH

SOUTH ORLEANS

BOURNEDALE

WOODS HOLE

WEST DENNIS

HARWICH PORT

MONUMENT BEACH

BARNSTABLE

NORTH SAGAMORESHANGRI LA

MATTAPOISETT

SAGAMORE

WEST CHATHAM

OSTERVILLE

ONSET

SOUTH HARWICH

SILVER BEACH

GOSNOLDGOSNOLD

NORTH CHATHAM

SOUTH CHATHAMWEST HARWICH

WEST HARWICH

FALMOUTHMARAVISTA

SWIFTS BEACH

WAREHAM

NORTH CHATHAM

BUTLERVILLE

WEWEANTIC SHORES

FAIRHAVEN

GRAY GABLES

WHITE ISLAND SHORES

SEACOAST SHORES

SOUTH EASTHAM

FALMOUTH HEIGHTS

GOSNOLD

RIVERSIDE

NANUMET HEIGHTS

POPPONESSETT BEACH

NORTH CHATHAM

MASHNEE VILLAGE

WAREHAM LAKE SHORES

NORTH CHATHAM

WEST YARMOUTH CAMP GROUNDS

Sources: Esri, HERE, DeLorme, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), EsriKorea, Esri (Thailand), MapmyIndia, NGCC, © OpenStreetMap contributors, and the GIS User Community

Legend

Year

2012

2013

2014

2015

2016

2017

Riser Leak Location Overview 2012 to 2017

µ

Comment 2017 2016 2015 2014 2013 2012 2017 2016 2015 2014 2013 2012 2017 2016 2015 2014 2013 2012 2017 2016 2015 2014 2013 2012

Riser Leak 61 98 60 53 30 36 32 40 30 40 32 38 4 4 4 6 8 19 97 142 94 99 70 93

Other 51 20 45 29 36 13 28 36 34 61 48 12 7 3 7 16 9 21 86 59 86 106 93 46

Total 112 118 105 82 66 49 60 76 64 101 80 50 11 7 11 22 17 40 183 201 180 205 163 139

Equipment Repair Breakdown by Material – Colonial Cape

PL CS Other (BS/WI/CU/Unknown) Total


ANALYSIS OF FINDINGS AND EXPLANATIONS FINDING 2: RI Total leak receipts have increased by 25% in 2017 compared to 2016, and the total Leak Repairs increased by

13%. MAIN- Leak repairs have increased by 16% in 2017 compared to 2016. Total Cast Iron break reduced by 33%. SERVICE- Leak repairs have increased by 9% compared to 2016. Type 1 leak repair increased by 10%, and the

number of Type 3 repairs increased by over three times.

284


LPP Replacement Projection

285

CY12 CY13 CY14 CY15 CY16 CY172017

LPPCY18 CY19 CY20 CY21 CY22 CY23 CY24 CY25 CY26 CY27 CY28 CY29 CY30 CY31 CY32 CY33 CY34

All Programs 26 42 43 41 48 57 58.6 65 70 75 80 84 89 92 95 99 104 110 117 125 134 141.4 141

Proactive 3 16 18 15 18 22 25.6 32 37 44 49 56 61 66 72 79 86 94 103 113 124 136 140

All Programs 51 54 52 80 96 115.9 135 155 175 195 215 219 221 222 224 225 227 230 234 238 244 250 254

Proactive 38 36 40 72 87 108 127 145.5 167 187 207 212 213 218 220 222 225 229 233 238 244 250 254.0

All Programs 28 40 42 39 46 53.8 50 51 51 52 52 52 52 52 52 52 51 51

Proactive 25 37 38 34 41 48 46 48 48 49 49 49 49 49 49 49 49 49

All Programs 105 136 136 160 190 226.8 244 271 296 322 347 355 362 366 371 376 382 391 351 363 378 391 395

Proactive 67.0 89.1 95.2 121.2 146.0 177.2 199 226 252 280 305 317 323 333 341 350 360 372 336 351 368 386 394

*Projected

CY12 CY13 CY14 CY15 CY16 CY172017


All Programs 109.4 95.8 110.0 101.1 123.8 121.2 115 120 123 126 129 132 135 138 145 150 155 165 175 175 166 160 155

Proactive 75.8 69.1 54.8 40.2 61.4 63.6 56 59.0 60.0 63.0 64.5 66.0 69.0 70.0 75 80 85 95 110 115 115 115 115

All Programs 63.2 42.6 48.6 39.6 38.2 44.7 40 34 28 25 20 20 18 18

Proactive 60.6 40.3 45.8 33.7 33.7 39.5 36 30 25 23 19 19 18 18

All Programs 172.6 138.4 158.6 140.7 162.0 165.9 155 154 151 151 149 152 153 156 145 150 155 165 175 175 166 160 155

Proactive 136.4 109.4 100.6 73.9 95.1 103.1 92 89 85 86 84 66 69 70 75 80 85 95 110 115 115 115 115

All Programs 54.3 44.0 28.8 56.0 62.7 63.3 60 65 65 65 65 65 65 69 69 69 69 69 69 69 69 69 69

Proactive 50.0 39.9 23.0 50.3 51.0 48.3 50 49.7 49.7 49.7 49.7 53.0 54 59 59 59 60 61 61 62 62 63 63

All Programs 226.9 182.4 187.4 196.7 224.7 229.2 215 219 216 216 214 217 218 225 214 219 224 234 244 244 235 229 224

Proactive 186.4 149.3 123.6 124.2 146.1 151.4 142 139 135 136 133 138 141 147 134 139 145 156 171 177 177 178 178

*Projected

2,946

203

3,149

1,140

3,807

NYS - Leak Prone Pipe Replacement

1,680

3,663

618

5,961

NE - Leak Prone Pipe Replacement

RI

MA

CLC

KEDNY

NY STATE

BGC

KEDLI

NIMO

NE

CY12 CY13 CY14 CY15 CY16 CY172017


All Programs 26 42 43 41 48 57 58.6 65 70 75 80 84 89 92 95 99 104 110 117 125 134 141.4 141

Proactive 3 16 18 15 18 22 25.6 32 37 44 49 56 61 66 72 79 86 94 103 113 124 136 140

All Programs 51 54 52 80 96 115.9 135 155 175 195 215 219 221 222 224 225 227 230 234 238 244 250 254

Proactive 38 36 40 72 87 108 127 145.5 167 187 207 212 213 218 220 222 225 229 233 238 244 250 254.0

All Programs 28 40 42 39 46 53.8 50 51 51 52 52 52 52 52 52 52 51 51

Proactive 25 37 38 34 41 48 46 48 48 49 49 49 49 49 49 49 49 49

All Programs 105 136 136 160 190 226.8 244 271 296 322 347 355 362 366 371 376 382 391 351 363 378 391 395

Proactive 67.0 89.1 95.2 121.2 146.0 177.2 199 226 252 280 305 317 323 333 341 350 360 372 336 351 368 386 394

*Projected

CY12 CY13 CY14 CY15 CY16 CY172017


All Programs 109.4 95.8 110.0 101.1 123.8 121.2 115 120 123 126 129 132 135 138 145 150 155 165 175 175 166 160 155

Proactive 75.8 69.1 54.8 40.2 61.4 63.6 56 59.0 60.0 63.0 64.5 66.0 69.0 70.0 75 80 85 95 110 115 115 115 115

All Programs 63.2 42.6 48.6 39.6 38.2 44.7 40 34 28 25 20 20 18 18

Proactive 60.6 40.3 45.8 33.7 33.7 39.5 36 30 25 23 19 19 18 18

All Programs 172.6 138.4 158.6 140.7 162.0 165.9 155 154 151 151 149 152 153 156 145 150 155 165 175 175 166 160 155

Proactive 136.4 109.4 100.6 73.9 95.1 103.1 92 89 85 86 84 66 69 70 75 80 85 95 110 115 115 115 115

All Programs 54.3 44.0 28.8 56.0 62.7 63.3 60 65 65 65 65 65 65 69 69 69 69 69 69 69 69 69 69

Proactive 50.0 39.9 23.0 50.3 51.0 48.3 50 49.7 49.7 49.7 49.7 53.0 54 59 59 59 60 61 61 62 62 63 63

All Programs 226.9 182.4 187.4 196.7 224.7 229.2 215 219 216 216 214 217 218 225 214 219 224 234 244 244 235 229 224

Proactive 186.4 149.3 123.6 124.2 146.1 151.4 142 139 135 136 133 138 141 147 134 139 145 156 171 177 177 178 178

*Projected

2,946

203

3,149

1,140

3,807

NYS - Leak Prone Pipe Replacement

1,680

3,663

618

5,961

NE - Leak Prone Pipe Replacement

RI

MA

CLC

KEDNY

NY STATE

BGC

KEDLI

NIMO

NE


Cast Iron/Unprotected Steel Ratio

286

2014 2015 2016 2017

Cast Iron 39.6 37.8 37.8 51.1

Unp. Steel 3.2 3.3 10.7 5.7

Cast Iron 10.3 19.0 8.7 22.8

Unp. Steel 41.2 61.2 87.6 93.1

Cast Iron 39.6 37.7 44.1 47.2

Unp. Steel 2.4 1.2 1.4 6.6

Cast Iron 89.5 94.5 90.6 121.1

Unp. Steel 46.8 65.7 99.7 105.4

NYS - Cast Iron / Unprotected Steel

Calendar Years

KEDNY

KEDLI

NMPC

NYS

2014 2015 2016 2017

Cast Iron 67.1 69.1 53.6 64.4

Unp. Steel 42.9 32.0 70.2 59.3

Cast Iron 10.1 5.4 3.4 4.6

Unp. Steel 38.5 34.2 34.8 41.6

Cast Iron 77.2 74.5 56.9 69.0

Unp. Steel 81.4 66.2 105.0 100.9

Cast Iron 20.1 29.4 19.8 24.7

Unp. Steel 8.7 39.5 41.0 28.5

CLC

MA

RI

NE - Cast Iron / Unprotected Steel

Calendar Years

BGC


APPENDICES

287


288

2017 LEAK RECEIPTS AS A FUNCTION

OF TOTAL SYSTEM PIPE MILEAGE

NYC Upstate LI 4,075 Leak Receipts

4,141 miles of Main

568,846 #’s of Services

(4,848 miles)

8,989 total miles of pipe

0.45 Leak Receipts

per Mile of Pipe

3,292 Leak Receipts

8,184 miles of Main


(6,733 miles)


0.22 Leak Receipts

per Mile of Pipe

1,633 Leak Receipts

8,783 miles of Main


(7,786 miles)


0.10 Leak Receipts

per Mile of Pipe

NY State 9,000 Leak Receipts

21,108 miles of Main

1,679,685 #’s of Services

(19,374 miles)


0.22 Leak Receipts

per Mile of Pipe


289



BGC CAPE EGC 7,018 Leak Receipts

6,367 miles of Main


(4,493 miles)

10,860 total miles of

pipe

0.65 Leak Receipts

per Mile of Pipe

233 Leak Receipts

866 miles of Main


(707 miles)


pipe

0.15 Leak Receipts

per Mile of Pipe

325 Leak Receipts

2,475 miles of Main


(1,690 miles)


0.08 Leak Receipts

per Mile of Pipe

MA 7,905 Leak Receipts



(7,939 miles)


pipe

0.42 Leak Receipts

per Mile of Pipe

LOWELL 329 Leak Receipts

1,397 miles of Main


(1,054 miles)


pipe

0.13 Leak Receipts

per Mile of Pipe


290



NY State 9,000 Leak Receipts



(19,374 miles)


0.22 Leak Receipts

per Mile of Pipe

MA State 7,905 Leak Receipts



(7,939 miles)


pipe

0.42 Leak Receipts

per Mile of Pipe

US-NGrid 18,607 Leak Receipts



(30,067 miles)


0.28 Leak Receipts

per Mile of Pipe

RI 1,924 Leak Receipts

3,205 miles of Main


(2,754 miles)


pipe

0.29 Leak Receipts

per Mile of Pipe


TOTAL LEAK RECEIPTS

291

5,195

5,837

4,347

4,516

3,912

3,527

3,350

3,935

3,380 3,292 2,826 2,747

2,526

3,370

3,383 3,332

4,984

5,812

4,340

4,075

1,700 1,708 1,767 1,653

1,213 1,205

1,800

2,122

1,639 1,633

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

ea

ks

Year

LI

NYC

Upstate

INCLUDES ALL TYPE 1, 2A, 2 and 3 LEAKS DISCOVERED - EXCLUDING DAMAGES NYS


TOTAL LEAK RECEIPTS

292

6,116

7,878

7,173 6,956

5,091

5,606

6,240

7,970

6,100

7,018

327 352 356 251 231 190 294 376

260 233

494 740 442 412 422 375

390 387 339 325

381 510 413

327 235 253 324 592

302 329

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

ea

ks

Year

BGC

EGC

CAPE

LOWELL

INCLUDES ALL TYPE 1, 2A, 2 and 3 LEAKS DISCOVERED - EXCLUDING DAMAGES MA


TOTAL LEAK RECEIPTS

293

3,134

3,652

2,624 2,502 2,417 2,252

2,753

2,183

1,541

1,924

0

1,000

2,000

3,000

4,000

5,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

ea

ks

Year

RI

INCLUDES ALL TYPE 1, 2A, 2 and 3 LEAKS DISCOVERED - EXCLUDING DAMAGES RI

Note: SI ’15 and ’16 data corrected with Excluding Damages


TOTAL LEAK RECEIPTS

294

9,721 10,292

8,640 9,539

8,508 8,064

10,134

11,869

9,359 9,000

7,318

9,480 8,384 7,946

5,979 6,424

7,248

9,325

7,001 7,905

3,134 3,652

2,624 2,502 2,417 2,252 2,753

2,183 1,541 1,924

20,173

23,424

19,648 19,987

16,904 16,740

20,135

23,601

17,901 18,829

0

6,000

12,000

18,000

24,000

30,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

ea

ks

Year

NY State

MA

RI

US-NGrid



295



5,835

6,397

4,864

5,478

4,061 4,041

3,484

4,309

3,658

3,986

3,886 3,895 3,776 4,061

4,447 4,023

6,650

7,560

5,701 5,912

2000

3000

4000

5000

6000

0

2,000

4,000

6,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Company Public Heating Degree Days NYS


296



3,812

4,965

4,536 4,487

3,111

3,824

4,143

5,784

4,456

5,565

3,506 4,515

3,848 3,459

2,868 2,600

3,105

3,541

2,545 2,340

2000

3000

4000

5000

6000

0

2,000

4,000

6,000

8,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

°F

Nu

mb

er o

f L

eak

s

Company Public Heating Degree Days MA


297



2540 2510

1578 1559

1422

1238

1730 1966

1247

1609

594

1142 1046 943

995 1014 1023

217

294 315

2000

3000

4000

5000

6000

0

500

1000

1500

2000

2500

3000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Nu

mb

er o

f L

eak

s

Company Public Heating Degree Days RI


MAIN

298


299

Company

42%

Public

58%

2017 LEAK RECEIPTS

BY DISCOVERY SOURCE (EXCLUDING DAMAGES)

Company

40%

Public

60%

Company

79%

Public

21% Company

24%

Public

76%

NYC LI Upstate

NY State


2017 LEAK RECEIPTS


Company

70%

Public

30%

Company

71%

Public

29%

Company

71%

Public

29%

300

Company

71%

Public

29%

BGC EGC

Cape

MA State

Company

59%

Public

41%

Lowell


301

2017 LEAK RECEIPTS


Company

56%

Public

44%

Company

84%

Public

16%

RI

Company

40%

Public

60%

NY State

US-NGrid

Company

70%

Public

30%

MA State


302

MAIN

INVENTORY

(MILES)

NYC Average Age

Of All NYC

Distribution Main:

49.94 Years

DOT-Reported Distribution Pipe Inventories

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 771 832 901 940 986 1,030 1,083 1,119 1,241 1,325

Cast Iron 1,750 1,728 1,692 1,674 1,651 1,622 1,586 1,566 1,413 1,357

PROTECTED STEEL 1,130 1,127 1,127 1,153 1,165 1,165 1,151 1,144 1,145 1,135

UNPROT’D STEEL 389 382 375 342 326 318 314 314 318 324

Other - - - - - - - - -

Ductile Iron - - - - - - - - -

TOTAL MAIN 4,040 4,069 4,095 4,109 4,128 4,135 4,134 4,143 4,118 4,141 Protected and Unprotected Steel inventory ran by Corrosion Department.


303

LI MAIN

INVENTORY

(MILES)

Average Age

Of All LI

Distribution Main:

39.69 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 2,711 2,908 2,968 3,034 3,115 3,218 3,320 3,425 3,603 3,763

Cast Iron 385 378 355 345 337 331 317 312 276 261

PROTECTED STEEL 1,137 1,139 1,143 1,147 1,146 1,150 1,153 1,149 1,142 1,147

UNPROT’D STEEL 3,496 3,389 3,341 3,296 3,245 3,193 3,141 3,095 3,092 3,013

Other - - - - - - - - -

Ductile Iron - - - - - - - - -



304

UPSTATE MAIN

INVENTORY

(MILES)

Average Age

Of All Upstate

Distribution Main:

39.07 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 3,948 4,028 4,082 4,119 4,201 4,283 4,361 4,444 4,544 4,643

Cast Iron 713 668 639 612 585 548 523 489 453 406

PROTECTED STEEL 3,542 3,526 3,526 3,526 3,528 3,528 3,528 3,530 3,530 3,522

UNPROT’D STEEL 286 285 276 271 238 236 231 227 218 212

Other - - - - - - - -

Ductile Iron - - - - - - - -

TOTAL MAIN 8,489 8,507 8,523 8,528 8,552 8,594 8,643 8,690 8,745 8,783

Protected and Unprotected Steel inventory ran by Corrosion Department.


305

MAIN

INVENTORY

(MILES)

NY STATE Average Age

Of All NY State

Distribution Main:

41.48 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 7,430 7,768 7,951 8,093 8,302 8,531 8,764 8,988 9,388 9,731

Cast Iron 2,848 2,774 2,686 2,631 2,573 2,501 2,426 2,367 2,142 2,024

PROTECTED STEEL 5,809 5,792 5,796 5,826 5,839 5,843 5,832 5,823 5,817 5,804

UNPROT’D STEEL 4,171 4,056 3,992 3,909 3,809 3,747 3,686 3,636 3,628 3,549

Other - - - - - - - - - -

Ductile Iron - - - - - - - - - -



306

MAIN

INVENTORY

(MILES)

BGC


Average Age

Of All BGC

Distribution Main:

52.01 Years

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 1,548 1,637 1,732 1,826 1,946 2,054 2,179 2,279 2,389 2,533

Cast Iron 2,255 2,219 2,167 2,123 2,061 2,005 1,946 1,888 1,839 1,768

Recond. Cast Iron - - - - - - - - 5 5

PROTECTED STEEL 964 990 1,022 1,041 1,045 1,040 1,028 997 988 974

UNPROT’D STEEL 1,479 1,418 1,360 1,302 1,256 1,225 1,189 1,181 1,145 1,087

Other 0 0 0 0 0 0 - 5 - -

Ductile Iron - - - - - - - - - -

TOTAL MAIN 6,247 6,264 6,282 6,292 6,309 6,324 6,342 6,350 6,366 6,367


307

MAIN

INVENTORY

(MILES)

EGC Average Age

Of All EGC

Distribution Main:

37.20 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 403 405 409 412 416 422 427 433 440 444

Cast Iron 93 92 91 88 86 84 81 79 76 73

PROTECTED STEEL 328 335 337 337 337 337 335 334 332 331

UNPROT’D STEEL 32 26 24 22 21 19 19 19 19 18

Other - - - - - - - - -

Ductile Iron - - - - - - - - -

TOTAL MAIN 855 858 860 859 860 863 863 865 867 866


308

MAIN

INVENTORY

(MILES)

CAPE Average Age

Of All Cape

Distribution Main:

28.41 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 1,454 1,462 1,479 1,518 1,575 1,603 1,645 1,672 1,704 1,738

Cast Iron 0 0 0 0 - - - - - -

PROTECTED STEEL 691 706 717 721 722 722 719 715 707 690

UNPROT’D STEEL 257 241 222 187 143 121 97 82 66 48

Other - - - - - - - - - -

Ductile Iron - - - - - - - - - -

TOTAL MAIN 2,402 2,409 2,419 2,427 2,440 2,445 2,462 2,469 2,477 2,475


309

MAIN

INVENTORY

(MILES)

LOWELL Average Age

Of All Lowell

Distribution Main:

36.62 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 571 581 590 606 623 639 665 683 693 716

Cast Iron 130 126 122 118 113 105 99 97 96 90

PROTECTED STEEL 592 597 601 599 575 570 566 552 536 526

UNPROT’D STEEL 87 79 73 67 80 76 66 63 70 66

Other - - - - - - - - -

Ductile Iron - - - - - - - - -

TOTAL MAIN 1,380 1,383 1,386 1,390 1,391 1,389 1,396 1,395 1,395 1,397


310

MAIN

INVENTORY

(MILES)

MA Average Age

Of All MA

Distribution Main:

43.66 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 3,975 4,086 4,210 4,362 4,560 4,718 4,916 5,067 5,225 5,431

Cast Iron 2,478 2,437 2,380 2,330 2,260 2,194 2,127 2,064 2,006 1,930

Recond. Cast Iron - - - - - - - - 5 5

PROTECTED STEEL 2,574 2,628 2,676 2,698 2,680 2,669 2,649 2,598 2,562 2,520

UNPROT’D STEEL 1,856 1,763 1,679 1,579 1,500 1,440 1,372 1,345 1,299 1,219

Other - - - - - - - 5 - -

Ductile Iron - - - - - - - - - -

TOTAL MAIN 10,884 10,915 10,946 10,968 11,000 11,021 11,064 11,079 11,105 11,105


311

MAIN

INVENTORY

(MILES)

RI Average Age

Of All RI

Distribution Main:

44.48 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 968 1,002 1,044 1,103 1,168 1,227 1,287 1,378 1,417 1,476

Cast Iron 896 885 878 875 859 831 806 769 754 730

Recond. Cast Iron - - - - - - - - - -

PROTECTED STEEL 578 551 601 588 597 596 595 595 590 590

UNPROT’D STEEL 664 674 592 580 534 508 483 452 416 395

Other 1 - - 0 0 0 - - -

Ductile Iron 17 17 17 17 16 16 16 16 16 16

TOTAL MAIN 3,124 3,129 3,132 3,163 3,174 3,179 3,188 3,210 3,193 3,205


312

MAIN

INVENTORY

(MILES)

US-NGrid Average Age

Of All US-NGrid

Distribution Main:

42.44 Years


2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 12,373 12,855 13,205 13,558 14,030 14,477 14,968 15,433 16,030 16,642

Cast Iron 6,223 6,097 5,944 5,835 5,692 5,526 5,358 5,200 4,902 4,684

PROTECTED STEEL 8,962 8,971 9,073 9,113 9,116 9,108 9,076 9,016 8,969 7,613

UNPROT’D STEEL 6,691 6,493 6,263 6,069 5,843 5,695 5,541 5,433 5,343 3,944

Other 1 0 0 0 0 0 - 5 - 0

Ductile Iron 17 17 17 17 16 16 16 16 16 16

TOTAL MAIN 34,266 34,433 34,503 34,591 34,697 34,821 34,960 35,103 35,269 35,418


313

SERVICES


314

2017 DETAILS OF

MAIN LEAK REPAIRS


315

MAIN LEAK REPAIRS

MATERIAL-CAUSE MATRIX NY State


CORROSION MATL/WELD NAT FORCE OTH OS FRC EQUIPMENT OPERATIONS CI JT/OTHER DAMAGES ALL CAUSES

CAST IRON 40 1 242 2 93 0 3,151 14 3,543

STEEL 769 4 13 25 251 0 5 28 1,095

BARE 556 0 4 1 178 0 2 12 753

COATED 213 4 9 24 73 0 3 16 342

PLASTIC 7 36 9 14 39 6 4 105 220

OTHER 0 0 0 0 0 0 0 0 0

ALL MAINS 816 41 264 41 383 6 3,160 147 4,858


316

MAIN LEAK REPAIRS

MATERIAL-CAUSE MATRIX MA



CAST IRON 60 0 254 0 148 0 5,201 19 5,682

STEEL 1,131 0 9 1 274 5 17 20 1,457

BARE 873 0 0 0 114 3 7 6 1,003

COATED 258 0 9 1 160 2 10 14 454

PLASTIC 1 9 2 2 92 0 11 73 190

OTHER 0 0 0 0 0 0 0 0 0

ALL MAINS 1,192 9 265 3 514 5 5,229 112 7,329


317

MAIN LEAK REPAIRS

MATERIAL-CAUSE MATRIX RI



CAST IRON 4 0 26 0 27 0 663 5 725

STEEL 98 0 0 0 22 0 3 3 126

BARE 85 0 0 0 12 0 3 2 0

COATED 13 0 0 0 10 0 0 1 24

PLASTIC 0 0 0 1 9 0 0 8 18

OTHER 0 0 0 0 0 0 0 0 0

ALL MAINS 102 0 26 1 58 0 666 16 869


318

MAIN LEAK REPAIRS

MATERIAL-CAUSE MATRIX US-NGrid



CAST IRON 104 1 522 2 268 0 9,015 38 9,950

STEEL 1,998 4 22 26 547 5 25 51 2,678

BARE 1,514 0 4 1 304 3 12 20 1,858

COATED 484 4 18 25 243 2 13 31 820

PLASTIC 8 45 11 17 140 6 15 186 428

OTHER 0 0 0 0 0 0 0 0 0

ALL MAINS 2,110 50 555 45 955 11 9,055 275 13,056


319

SERVICE

INVENTORY

(NUMBER OF SERVICES)

NYC

DOT-Reported Pipe Inventories *NYC 2016 Inventory altered due to DIS (Distribution Information System) data correction.

DOT Note: The service inventory has been decreasing from 2014 due to abandonment efforts. Fewer new customers have been added to the system.

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 332,591 338,074 344,615 347,496 353,440 359,909 366,434 374,435 385,825 393,930

Copper 139,978 137,480 135,861 135,426 133,994 132,557 129,131 128,402 115,291 111,065

Cast Iron - - - - - - - - - -

PROTECTED STEEL 56,581 54,399 53,936 53,850 53,399 51,217 48,898 44,147 37,889 36,955

UNPROT’D STEEL 33,561 31,473 30,168 28,804 27,697 25,371 24,450 21,532 29,038 26,896

Other - - - - - - - - - -

TOTAL SERVICES 562,711 561,426 564,580 565,576 568,530 569,054 568,913 568,516 568,043 568,846


320

LI SERVICE

INVENTORY


DOT-Reported Pipe Inventories DOT Note: Due to the change in systems: Fit Asset to Fortis

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 306,984 329,177 344,421 353,589 365,113 380,534 390,715 400,330 421,376 430,006

Copper 5,684 5,585 5,499 5,421 5,377 5,340 5,308 5,102 4,973 4,290

Cast Iron - - - - - - - - - -

PROTECTED STEEL 35,449 35,426 35,497 35,459 35,462 35,405 35,554 35,024 35,028 34,628

UNPROT’D STEEL 155,886 138,315 127,771 123,355 115,778 107,215 104,003 100,982 82,797 78,001

Other - - - - - - - - - -

TOTAL SERVICES 504,003 508,503 513,188 517,824 521,730 528,494 535,580 541,438 544,174 546,925


321

UPSTATE SERVICE

INVENTORY


DOT-Reported Pipe Inventories Protected steel services decreased and unprotected steel services increased. The decrease in cathodically protected steel services is due to a large number of services being moved to inactive incorrectly. The count of unprotected steel services is calculated based on the decrease in steel services overall. Because the cathodically protected steel services had a decrease, the unprotected steel services increased based on the formula.

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 347,978 353,007 359,477 366,258 372,322 380,652 388,225 397,003 401,394 408,725

Copper 19,846 19,582 19,115 18,857 18,841 17,969 17,578 17,068 16,501 15,939

Cast Iron 3,364 3,364 3,216 3,175 2,874 1,600 2,109 1,070 862 417

PROTECTED STEEL 19,367 18,593 18,439 18,355 18,338 18,336 18,342 18,345 14,167 14,710

UNPROT’D STEEL 142,827 142,796 140,873 139,185 136,880 134,131 129,432 125,009 128,539 124,123

Other - - - - - - - - - -

TOTAL SERVICES 533,382 537,342 541,120 545,830 549,255 552,688 555,686 558,495 561,463 563,914


322

SERVICE

INVENTORY


DOT-Reported Pipe Inventories

NY STATE

*NYC 2016 Inventory altered due to DIS (Distribution Information System) data correction

*LI 2016 Inventory altered due to Fortis data correction

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 987,553 1,020,258 1,048,513 1,067,343 1,090,875 1,121,095 1,145,374 1,171,768 1,208,595 1,232,661

Copper 165,508 162,647 160,475 159,704 158,212 155,866 152,017 150,572 136,765 131,294

Cast Iron 3,364 3,364 3,216 3,175 2,874 1,600 2,109 1,070 862 417

PROTECTED STEEL 111,397 108,418 107,872 107,664 107,199 104,958 102,794 97,516 87,084 86,293

UNPROT’D STEEL 332,274 312,584 298,812 291,344 280,355 266,717 257,885 247,523 240,374 229,020

Other - - - - - - - - - -

TOTAL SERVICES 1,600,096 1,607,271 1,618,888 1,629,230 1,639,515 1,650,236 1,660,179 1,668,449 1,673,680 1,679,685


323

BGC SERVICE

INVENTORY


DOT- Reported Pipe Inventories DOT Note:

Our DOT inventory assumes % of services installed by decade for steel services are cathodically protected and not protected. When we replace those vintages, this causes a decrease in protected steel service inventories

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 200,261 210,590 222,462 230,205 241,956 251,799 259,524 268,606 275,836 288,814

Copper 10,284 10,079 9,898 9,693 9,502 9,265 9,137 8,969 8,828 8,534

Cast Iron 1,921 1,848 1,775 1,702 1,603 1,549 1,507 1,460 1,414 1,368

PROTECTED STEEL 36,758 35,569 34,114 33,320 32,561 31,947 31,464 30,828 30,358 29,271

UNPROT’D STEEL 131,350 126,422 120,304 116,389 112,383 113,114 110,226 106,945 103,897 98,873

Other 102,183 98,542 93,385 91,850 88,417 83,277 83,309 83,606 84,056 80,045

TOTAL SERVICES 482,757 483,050 481,938 483,159 486,422 490,951 495,167 500,414 504,389 506,905


324

EGC SERVICE

INVENTORY


DOT- Reported Pipe Inventories Note: Services are duplicated when entered into the CRIS database and is linked to the SPIPE database. The data will be scrubbed by Mapping. Issue found in all MA.

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 27,869 28,369 28,775 29,294 29,869 30,917 31,440 32,128 32,496 33,103

Copper - - - - - - - - - -

Cast Iron 10 10 10 10 7 6 6 6 4 4

PROTECTED STEEL 5,266 5,083 5,028 4,981 4,929 4,874 4,795 4,736 4,693 4,638

UNPROT’D STEEL 5,719 5,535 5,394 5,253 5,114 4,959 4,830 4,590 4,457 4,296

Other 1,914 1,912 1,929 2,005 2,114 2,131 2,144 3,333 7,419 10,059

TOTAL SERVICES 40,778 40,909 41,136 41,543 42,033 42,887 43,215 44,793 49,069 52,100


325

CAPE SERVICE

INVENTORY


DOT- Reported Pipe Inventories Note: Our DOT inventory assumes % of services installed by decade for steel services are cathodically protected and not protected. When we replace those vintages, this causes a decrease in protected steel service inventories

Services are duplicated when entered into the CRIS database and is linked to the SPIPE database. The data will be scrubbed by Mapping. Issue found in all MA.

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 66,728 68,946 70,676 72,315 75,309 77,877 80,517 82,228 83,688 86,137

Copper - - - - - - - - - -

Cast Iron 18 17 16 15 15 15 16 16 16 15

PROTECTED STEEL 20,935 21,233 21,265 20,908 20,419 20,194 19,806 19,510 19,065 18,178

UNPROT’D STEEL 6,159 6,025 5,872 5,357 4,813 4,569 4,076 3,841 3,622 3,317

Other 10,900 10,511 8,681 8,652 8,774 8,836 9,119 9,670 9,833 9,743

TOTAL SERVICES 104,740 106,732 106,510 107,247 109,330 111,491 113,534 115,265 116,224 117,390


326

LOWELL SERVICE

INVENTORY




2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 40,048 41,267 42,312 43,548 44,768 46,169 47,785 48,906 49,651 51,348

Copper 1 1 1 1 1 1 1 1 1 1

Cast Iron 19 14 13 2 - - - - - -

PROTECTED STEEL 23,659 23,391 22,944 22,515 22,116 21,629 20,999 20,515 20,213 19,449

UNPROT’D STEEL 7,569 6,956 6,676 6,346 6,077 5,759 5,424 5,228 5,105 4,761

Other 1,785 1,707 1,541 1,199 1,036 1,114 1,111 1,256 1,661 1,966

TOTAL SERVICES 73,081 73,336 73,487 73,611 73,998 74,672 75,320 75,906 76,631 77,525


327

MA SERVICE

INVENTORY




2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 334,906 349,172 364,225 375,362 391,902 406,762 419,266 431,868 441,671 459,402

Copper 10,285 10,080 9,899 9,694 9,503 9,266 9,138 8,970 8,829 8,535

Cast Iron 1,968 1,889 1,814 1,729 1,625 1,570 1,529 1,482 1,434 1,387

PROTECTED STEEL 86,618 85,276 83,351 81,724 80,025 78,644 77,064 75,589 74,329 71,536

UNPROT’D STEEL 150,797 144,938 138,246 133,345 128,387 128,401 124,556 120,604 117,081 111,247

Other 116,782 112,672 105,536 103,706 100,341 95,358 95,683 97,865 102,969 101,813

TOTAL SERVICES 701,356 704,027 703,071 705,560 711,783 720,001 727,236 736,378 746,313 753,920


328

RI SERVICE

INVENTORY


DOT- Reported Pipe Inventories Note: Cathodically protected steel services decreased by 129 services. This is due to assigning materials to the longest segment in a service. Some services had a small amount of plastic cut in that changed the material of the service. 15 Ductile iron services in R.I. are counted as “Other” services

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 109,144 112,313 115,718 121,770 126,474 130,002 133,024 136,700 140,206 142,956

Copper 178 177 171 209 208 207 205 202 201 192

Cast Iron 175 168 162 194 189 185 174 137 134 129

PROTECTED STEEL 12,066 11,260 11,206 10,422 10,285 10,150 9,989 9,800 9,585 9,456

UNPROT’D STEEL 63,919 62,462 59,800 56,049 53,449 51,387 49,265 47,104 44,806 42,969

Other 1,470 1,405 1,348 1,322 1,085 1,000 958 900 854 803

TOTAL SERVICES 186,952 187,785 188,405 189,966 191,690 192,931 193,615 194,843 195,786 196,505


329

US-NGrid SERVICE

INVENTORY


DOT- Reported Pipe Inventories

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Plastic 1,431,603 1,481,743 1,528,456 1,564,475 1,609,251 1,657,859 1,697,664 1,740,336 1,790,472 1,835,019

Copper 175,971 172,904 170,545 169,607 167,923 165,339 161,360 159,744 145,795 140,021

Cast Iron 5,507 5,421 5,192 5,098 4,688 3,355 3,812 2,689 2,430 1,933

PROTECTED STEEL 210,081 204,954 202,429 199,810 197,509 193,752 189,847 182,905 170,998 167,285

UNPROT’D STEEL 546,990 519,984 496,858 480,738 462,191 446,505 431,706 415,231 402,261 383,236

Other 118,252 114,077 106,884 105,028 101,426 96,358 96,641 98,765 103,823 102,616

TOTAL SERVICES 2,488,404 2,499,083 2,510,364 2,524,756 2,542,988 2,563,168 2,581,030 2,599,670 2,615,779 2,630,110


330

2017 MATERIAL CAUSE

MATRIX

(SERVICE LEAK REPAIR)


331

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX NYC


CORROSION MATL/WELD NAT FORCE OTH OS FRC EQUIPMENT OPERATIONS OTHER DAMAGES ALL CAUSES

CAST IRON 0 0 0 0 0 0 0 0 0

COPPER 27 1 9 17 210 2 0 48 314

STEEL 257 0 18 4 284 2 0 18 583

BARE 142 0 15 4 67 0 0 10 238

COATED 115 0 3 0 217 2 0 8 345

PLASTIC 4 1 18 39 280 2 0 171 515

OTHER 0 0 0 0 0 0 0 0 0

ALL SVCS 288 2 45 60 774 6 0 237 1,412


332

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX LI



CAST IRON 0 0 0 0 0 0 0 0 0

COPPER 5 0 0 1 25 0 0 1 32

STEEL 711 0 2 4 186 0 5 44 952

BARE 555 0 2 4 154 0 3 35 753

COATED 156 0 0 0 32 0 2 9 199

PLASTIC 104 24 1 13 354 2 6 346 850

OTHER 0 0 0 0 0 0 0 0 0

ALL SVCS 820 24 3 18 565 2 11 391 1,834


333

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX UPSTATE



CAST IRON 4 0 0 0 0 0 1 1 6

COPPER 18 0 1 0 10 0 2 4 35

STEEL 287 7 15 5 83 0 34 12 443

BARE 103 1 3 3 18 0 6 3 137

COATED 184 6 12 2 65 0 28 9 306

PLASTIC 15 18 17 14 107 1 14 255 441

OTHER 0 0 0 0 0 0 0 0 0

ALL SVCS 324 25 33 19 200 1 51 272 925


334

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX NY STATE



CAST IRON 4 0 0 0 0 0 1 1 6

COPPER 50 1 10 18 245 2 2 53 381

STEEL 1,255 7 35 13 553 2 39 74 1,978

BARE 800 1 20 11 239 0 9 48 1,128

COATED 455 6 15 2 314 2 30 26 850

PLASTIC 123 43 36 66 741 5 20 772 1,806

OTHER 0 0 0 0 0 0 0 0 0

ALL SVCS 1,432 51 81 97 1,539 9 62 900 4,171


335

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX BGC



CAST IRON 7 0 6 0 9 0 20 1 43

COPPER 43 0 1 0 51 0 8 8 111

STEEL 1,566 2 5 2 162 1 38 34 1,810

BARE 1,451 0 2 2 103 1 18 22 1,599

COATED 115 2 3 0 59 0 20 12 211

PLASTIC 20 11 17 13 445 0 97 236 839

OTHER 1 0 1 1 29 0 3 1 36

ALL SVCS 1,637 13 30 16 696 1 166 280 2,839


336

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX EGC



CAST IRON 0 0 0 0 0 0 1 0 1

COPPER 0 0 0 0 0 0 0 0 0

STEEL 57 0 1 0 13 0 0 4 75

BARE 50 0 0 0 10 0 0 1 61

COATED 7 0 1 0 3 0 0 3 14

PLASTIC 1 3 0 0 68 0 2 24 98

OTHER 0 0 0 0 0 0 0 0 0

ALL SVCS 58 3 1 0 81 0 3 28 174


337

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX CAPE



CAST IRON 0 0 0 0 1 0 0 0 1

COPPER 0 0 0 0 0 0 0 0 0

STEEL 31 0 0 0 62 0 1 5 99

BARE 7 0 0 0 3 0 0 1 11

COATED 24 0 0 0 59 0 1 4 88

PLASTIC 0 3 0 1 108 0 16 88 216

OTHER 0 0 0 0 5 0 0 0 5

ALL SVCS 31 3 0 1 176 0 17 93 321


338

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX LOWELL



CAST IRON 0 0 0 0 0 0 1 0 1

COPPER 0 0 0 0 0 0 0 0 0

STEEL 74 0 0 0 53 0 1 9 137

BARE 30 0 0 0 3 0 0 2 35

COATED 44 0 0 0 50 0 1 7 102

PLASTIC 0 0 0 0 48 0 2 42 92

OTHER 0 0 0 0 1 0 0 0 1

ALL SVCS 74 0 0 0 102 0 4 51 231


339

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX MA



CAST IRON 7 0 6 0 10 0 22 1 46

COPPER 43 0 1 0 51 0 8 8 111

STEEL 1,728 2 6 2 290 1 40 52 2,121

BARE 1,538 0 2 2 119 1 18 26 1,706

COATED 190 2 4 0 171 0 22 26 415

PLASTIC 21 17 17 14 669 0 117 390 1,245

OTHER 1 0 1 1 35 0 3 1 42

0

ALL SVCS 1,800 19 31 17 1,055 1 190 452 3,565


340

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX RI



CAST IRON 1 0 2 0 1 0 0 0 4

COPPER 3 0 0 0 0 0 0 2 5

STEEL 452 0 0 0 27 0 2 15 496

BARE 429 0 0 0 17 0 2 12 460

COATED 23 0 0 0 10 0 0 3 36

PLASTIC 3 2 0 10 46 0 3 84 148

OTHER 1 0 0 0 0 0 0 0 1

ALL SVCS 460 2 2 10 74 0 5 101 654


341

2017 SERVICE LEAKS

MATERIAL-CAUSE MATRIX US-NGrid



CAST IRON 12 0 8 0 11 0 23 2 56

COPPER 96 1 11 18 296 2 10 63 497

STEEL 3,435 9 41 15 870 3 81 141 4,595

BARE 2,767 1 22 13 375 1 29 86 3,294

COATED 668 8 19 2 495 2 52 55 1,301

PLASTIC 147 62 53 90 1,456 5 140 1,246 3,199

OTHER 2 0 1 1 35 0 3 1 43

ALL SVCS 3,692 72 114 124 2,668 10 257 1,453 8,390


342

END OF SYSTEM INTEGRITY REPORT


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