hillsborough county, new hampshire

VOLUME 2 OF 5

Federal Emergency Management AgencyFLOOD INSURANCE STUDY NUMBER

33011CV002A

HILLSBOROUGH COUNTY, NEW HAMPSHIRE (ALL JURISDICTIONS) COMMUNITY NAME COMMUNITY NUMBER AMHERST, TOWN OF 330081 ANTRIM, TOWN OF 330082 BEDFORD, TOWN OF 330083 BENNINGTON, TOWN OF 330084 BROOKLINE, TOWN OF 330180 DEERING, TOWN OF 330085 FRANCESTOWN, TOWN OF 330086 GOFFSTOWN, TOWN OF 330087 GREENFIELD, TOWN OF 330209 GREENVILLE, TOWN OF 330088 HANCOCK, TOWN OF 330089 HILLSBOROUGH, TOWN OF 330090 HOLLIS, TOWN OF 330091 HUDSON, TOWN OF 330092 LITCHFIELD, TOWN OF 330093 LYNDEBOROUGH, TOWN OF 330218 MANCHESTER, CITY OF 330169 MASON, TOWN OF 330221 MERRIMACK, TOWN OF 330095 MILFORD, TOWN OF 330096 MONT VERNON, TOWN OF 330224 NASHUA, CITY OF 330097 NEW BOSTON, TOWN OF 330098 NEW IPSWICH, TOWN OF 330099 PELHAM, TOWN OF 330100 PETERBOROUGH, TOWN OF 330101 SHARON, TOWN OF 330192 TEMPLE, TOWN OF 335781 WEARE, TOWN OF 330235 WILTON, TOWN OF 330102 WINDSOR, TOWN OF 335780

Hillsborough County

Initial Countywide FIS Effective Date: September 25, 2009

NOTICE TO FLOOD INSURANCE STUDY USERS

Communities participating in the National Flood Insurance Program have established repositories of flood hazard data for floodplain management and flood insurance purposes. This Flood Insurance Study (FIS) may not contain all data available within the repository. It is advisable to contact the community repository for any additional data. Part or all of this FIS may be revised and republished at any time. In addition, part of this FIS may be revised by the Letter of Map Revision process, which does not involve republication or redistribution of the FIS. It is, therefore, the responsibility of the user to consult with community officials and to check the community repository to obtain the most current FIS components. Initial Countywide FIS Effective Date: September 25, 2009

TABLE OF CONTENTS – Volume 1

Page

1.0 INTRODUCTION 1

1.1 Purpose of Study 1

1.2 Authority and Acknowledgments 1

1.3 Coordination 6

2.0 AREA STUDIED 7

2.1 Scope of Study 7

2.2 Community Description 9

2.3 Principal Flood Problems 10

2.4 Flood Protection Measures 11

3.0 ENGINEERING METHODS 13

3.1 Hydrologic Analyses 13

3.2 Hydraulic Analyses 34

3.3 Vertical Datum 42

4.0 FLOODPLAIN MANAGEMENT APPLICATIONS 43

4.1 Floodplain Boundaries 43

4.2 Floodways 45

5.0 INSURANCE APPLICATIONS 95

6.0 FLOOD INSURANCE RATE MAP 97

7.0 OTHER STUDIES 97

8.0 LOCATION OF DATA 101

9.0 BIBLIOGRAPHY AND REFERENCES 101

i

ii

TABLE OF CONTENTS - Volume 1 - continued

Page

FIGURES Figure 1 - Floodway Schematic 95

TABLES Table 1 – Initial and Final CCO Meetings 6 Table 2 - Streams Studied by Detailed Methods 7 Table 3 – Scope of Revision 8 Table 4 – Letters of Map Correction 9 Table 5 - Summary of Discharges 20-33 Table 6 - Summary of Stillwater Elevations 34 Table 7 – Manning’s “n” values 40-41 Table 8 - Floodway Data Table 46-93 Table 9 - Community Map History 98-100


EXHIBITS Exhibit 1 - Flood Profiles Autumn Brook Panels 01P-03P Baboosic Brook Panels 04P-15P Bartemus Brook Panel 16P Beards Brook Panels 17P-24P Beaver Brook No. 1 Panels 25P-29P Beaver Brook No. 2 Panels 30P-34P Bettys Brook Panels 35P-37P Black Pond Brook Panels 38P-42P Bog Brook Panels 43P-45P

TABLE OF CONTENTS – Volume 2 - continued

EXHIBITS - continued Exhibit 1 - Flood Profiles (continued) Bowman Brook Panels 46P-51P Caesars Brook Panels 52P-53P Chase Brook Panels 54P-57P Contoocook River Panels 58P-71P Deering Reservoir Panels 72P-73P East Branch of Baboosic Brook Panel 74P Ferguson Brook Panels 75P-76P Gambol Brook Panels 77P-80P Golden Brook Panels 81P-84P Gorham Brook Panel 85P Great Brook No. 1 Panels 86P-89P


EXHIBITS - continued Exhibit 1 - Flood Profiles (continued) Great Brook No. 2 Panels 90P-91P Great Cohas Brook Panels 92P-95P Gumpas Pond Brook Panels 96P-103P

Gumpas Road Brook Panels 104P-106P Hartshorn Brook Panel 107P Hassells Brook Panels 108P-109P Holts Brook Panel 110P Hosley Brook Panel 111P Island Pond Brook Panels 112P-113P Joe English Brook Panels 114P-116P Limit Brook Panel 117P Lyle Reed Brook Panel 118P McQuade Brook Panels 119P-123P McQuade Brook Split Flow Panel 124P Merrimack River Panels 125P-136P Middle Branch Piscataquog River Panels 137P-144P Mill Brook Panels 145P-159P Moose Brook Panel 160P Nashua River Panels 161P-163P Naticook Brook Panels 164P-166P Nesenkeag River Panels 167P-171P New Meadow Brook Panels 172P-173P Nissitissit River Panels 174P-175P North Branch Panels 176P-178P North Branch Contoocook River Panels 179P-181P North Channel Piscataquog River Panel 182P

iii

TABLE OF CONTENTS –Volume 4

EXHIBITS - continued Exhibit 1 - Flood Profiles (continued)

Nubanusit Brook Panels 183P-194P Otter Brook Panels 195P-205P Otter Lake Brook Panels 206P-208P Ox Brook Panel 209P Parkhurst Brook Panel 210P Peacock Brook Panels 211P-212P Pennichuck Brook Panels 213P-220P Piscataquog River Panels 221P-240P Pointer Club Brook Panels 241P-245P Pulpit Brook Panels 246P-248P Purgatory Brook Panels 249P-252P Riddle Brook Panels 253P-256P Salmon Brook Panels 257P-260P Sand Brook Panels 261P-267P Second Brook Panels 268P-271P


EXHIBITS - continued Exhibit 1 - Flood Profiles (continued)

Shedd Brook Panels 272P-277P Sherburn Mill Brook Panels 278P-280P Simpson Mill Brook Panels 281P-282P Souhegan River Panels 283P-309P South Branch Piscataquog River Panels 310P-320P Spit Brook Panels 321P-323P Stony Brook Panels 324P-335P Tioga River Panels 336P-344P Tributary A Panel 345P Tributary B No. 1 Panels 346P-347P Tributary B No. 2 Panels 348P-353P Tucker Brook Panels 354P-358P Witches Brook Panels 359P-362P

Exhibit 2 - Flood Insurance Rate Map Index Flood Insurance Rate Map

iv

282

286

290 290

294 294

298 298

302 302

306 306

310 310

0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22

ELEV

ATIO

N IN

FEE

T (N

AVD

88)

STREAM DISTANCE IN MILES ABOVE MOUTH AT PISCATAQUOG RIVER

FEDE

RAL

EME R

GENC

Y M

A NAG

EMEN

T AG

ENC Y

HIL L

SBO R

OUGH

COU

N TY,

NH

(ALL

JU R

ISDI

C TIO

NS)

F LOO

D PR

O FIL

ES

AUTU

MN

B ROO

K

01P

A B

DEPO

T ST

R EET

CHU R

CH S

TREE

T

LEGEND0.2% ANNUAL CHANCE FLOOD

1% ANNUAL CHANCE FLOOD



STREAM BED

CROSS SECTION LOCATION

CULVERT

1% ANNUAL CHANCE BACKWATER FROM PISCATAQUOG RIVER

MOU

TH A

TPI

SCAT

AQUO

G RI

VER

298

300

302 302

304 304

306 306

308 308

310 310

312 312

0.22 0.24 0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILE ABOVE MOUTH AT PISCATAQUOG RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

AUTU

MN

B ROO

K

02P

C D

NORT

HM

AST

ROAD





STREAM BED


302

304

306 306

308 308

310 310

312 312

314 314

316 316

0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILE ABOVE MOUTH AT PISCATAQUOG RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

AUTU

MN

B ROO

K

03P

E

LIM

ITOF

DETA

ILE D

STUD

Y





STREAM BED


90

100

110 110

120 120

130 130

140 140

150 150

160 160

170 170

180 180

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

04P

AB C D

CONF

L UEN

CEW

ITH

SOUH

EGAN

RIVE

R

ABA N

DONE

DRA

ILR O

ADBR

I DGE

OFBA

B OOS

ICBR

OOK

FOOT

BRID

G E

EAST

BRAN

CHOF

BAB O

OSIC

B ROO

K

U.S .

ROUT

E3

MCG

AWBR

IDG E

ROAD

F.E.

EVE R

ETT

TURN

PIKE





STREAM BED


1% ANNUAL CHANCE FLOOD BACKWATER FROM MERRIMACK RIVER

CONF

LUEN

CEOF

EAS T

CHAN

NEL

DIVE

RGEN

CEOF

140

145

150 150

155 155

160 160

165 165

170 170

175 175

180 180

185 185

6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

05P

E F





STREAM BED


145

150

155 155

160 160

165 165

170 170

175 175

180 180

185 185

190 190

13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

06P

G

BEDF

ORD

R OAD

ABAN

DONE

D





STREAM BED


CULVERT

BRID

GE

145

150

155 155

160 160

165 165

170 170

175 175

180 180

185 185

190 190

19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

07P

H I

TWIN

BRID

GERO

AD





STREAM BED


(ABA

NDON

ED)

150

155

160 160

165 165

170 170

175 175

180 180

185 185

190 190

195 195

26000 26500 27000 27500 28000 28500 29000 29500 30000 30500 31000 31500 32000 32500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

08P

J K

L

CONF

LUEN

CEW

ITH

R IDD

LEB R

OOK

WIR

ERO

A D

CONF

L UEN

CEW

ITH

MC Q

UADE

BROO

K





STREAM BED


CULVERT

160

170

180 180

190 190

200 200

210 210

220 220

230 230

240 240

250 250

32500 33000 33500 34000 34500 35000 35500 36000 36500 37000 37500 38000 38500 39000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

09P

M

N

BEDF

ORD

R OAD





STREAM BED


180

185

190 190

195 195

200 200

205 205

210 210

215 215

220 220

225 225

39000 39500 40000 40500 41000 41500 42000 42500 43000 43500 44000 44500 45000 45500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

10P

O





STREAM BED


185

190

195 195

200 200

205 205

210 210

215 215

220 220

225 225

230 230

45500 46000 46500 47000 47500 48000 48500 49000 49500 50000 50500 51000 51500 52000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

11P

P

Q

BEAN

ROA D





STREAM BED


CULVERT

185

190

195 195

200 200

205 205

210 210

215 215

220 220

225 225

230 230

52000 52500 53000 53500 54000 54500 55000 55500 56000 56500 57000 57500 58000 58500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

12P

R

S

ABAN

D ONE

DR A

ILRO

ADAB

UTM

ENTS





STREAM BED


195

200

205 205

210 210

215 215

220 220

225 225

230 230

235 235

240 240

58500 59000 59500 60000 60500 61000 61500 62000 62500 63000 63500 64000 64500 65000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

13P

T U V

X

WOO

DWAR

DRO

AD

SNOW

MOB

ILE

B RID

GE

STO W

ELL

R OAD

DAM

DAM

(TOW

NLIN

E)





STREAM BED


W

210

215

220 220

225 225

230 230

235 235

240 240

245 245

250 250

255 255

65000 65500 66000 66500 67000 67500 68000 68500 69000 69500 70000 70500 71000 71500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

14P

Z

AA

CAM

PRO

ADB R

IDGE





STREAM BED

CROSS SECTION LOCATIONY

CONF

L UEN

CEO F

JOE

E NGL

ISH

BROO

K

220

225

230 230

235 235

240 240

245 245

250 250

255 255

260 260

265 265

71500 72000 72500 73000 73500 74000 74500 75000 75500 76000 76500 77000 77500 78000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BABO

O SIC

B ROO

K

15P

AB





STREAM BED


BABO

OSIC

LAKE

OUTL

ET

154

156

158 158

160 160

162 162

164 164

166 166

168 168

170 170

0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH NASHUA RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

B ART

E MUS

B ROO

K

16P

A B C D E F

CULVERT

TRAI

L

CULVERT





STREAM BED


BART

EMU S

B ART

EMU S

TRAI

L

NAS H

UARI

V ER

CONF

L UEN

CEW

ITH

1% ANNUAL CHANCE BACKWATER FROM NASHUA RIVER

LIM

ITOF

DETA

ILE D

STUD

Y

540

550

560 560

570 570

580 580

590 590

600 600

610 610

620 620

630 630

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH CONTOOCOOK RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

17P

A

B

STAT

ERO

UTE

202





STREAM BED


1% ANNUAL CHANCE BACKWATER FROM CONTOOCOOK RIVER

CONF

L UEN

CEW

ITH

CONT

O OCO

OKRI

VER

570

580

590 590

600 600

610 610

620 620

630 630

640 640

650 650

660 660

1.20 1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.10 2.20 2.30 2.40

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

18P

C D

E

F G H

I

OLD

S TAT

ERO

UTE

9

NEW

S TAT

ERO

UTE

9

BEAR

DRO

AD





STREAM BED


CONF

LUEN

CEOF

NOR T

HBR

A NCH

CON F

LUEN

C EOF

SHED

DBR

OOK

600

610

620 620

630 630

640 640

650 650

660 660

670 670

680 680

690 690

2.40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

19P

J KSH

EDD

ROAD





STREAM BED


650

660

670 670

680 680

690 690

700 700

710 710

720 720

730 730

740 740

3.60 3.70 3.80 3.90 4.00 4.10 4.20

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

20P

L





STREAM BED


720

730

740 740

750 750

760 760

770 770

780 780

790 790

800 800

810 810

4.20 4.30 4.40 4.50 4.60

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

21P

M

BEAR

DRO

AD





STREAM BED


760

770

780 780

790 790

800 800

810 810

820 820

830 830

840 840

850 850

4.60 4.70 4.80 4.90 5.00 5.10 5.20 5.30 5.40 5.50 5.60 5.70 5.80

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

22P

N O

GLEA

SON

FALL

SRO

AD





STREAM BED


805

810

815 815

820 820

825 825

830 830

835 835

840 840

845 845

850 850

5.80 6.00 6.20 6.40 6.60 6.80 7.00 7.20 7.40 7.60 7.80 8.00 8.20

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

23P

P Q R

DANF

ORT H

CORN

ERS

ROA D

UNN A

MED

R OAD





STREAM BED


830

835

840 840

845 845

850 850

855 855

860 860

865 865

870 870

875 875

8.20 8.40 8.60 8.80 9.00 9.20 9.40 9.60 9.80 10.00 10.20 10.40 10.60 10.80

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BEAR

DSBR

OOK

24P

S T U V

COOL

EDGE

R OAD

JONE

SHI

LLR O

AD

UNN A

MED

R OAD

L IM

ITOF

DETA

ILE D

STUD

Y





STREAM BED


100

105

110 110

115 115

120 120

125 125

130 130

135 135

140 140

145 145

4.50 4.70 4.90 5.10 5.30 5.50 5.70 5.90 6.10 6.30 6.50 6.70 6.90 7.10

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE MOUTH

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 1

25P

A B C D E

F

NEW

MEA

DOW

BROO

K





STREAM BED


CONF

LUEN

CEOF

STAT

EBO

UNDA

RY

100

105

110 110

115 115

120 120

125 125

130 130

135 135

140 140

145 145

7.10 7.30 7.50 7.70 7.90 8.10 8.30 8.50 8.70 8.90 9.10 9.30 9.50 9.70

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 1

26P

G H I J

K

WIL

L OW

STR E

ET

BRID

GEST

R EET

NAS H

UARO

AD

CONF

LUEN

CEOF

GUM

PAS

ROAD

BROO

K

CON F

LUEN

C EOF

TONY

SBR

OOK

GOL D

ENBR

OOK





STREAM BED


CONF

LUEN

CEOF

110

115

120 120

125 125

130 130

135 135

140 140

145 145

150 150

155 155

9.70 9.90 10.10 10.30 10.50 10.70 10.90 11.10 11.30 11.50 11.70 11.90 12.10 12.30

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 1

27P

L M N O P Q

R

MAR

SHRO

AD

HUTC

H INS

ONRO

AD

MIL

LDA

M





STREAM BED


125

130

135 135

140 140

145 145

150 150

155 155

160 160

165 165

170 170

12.30 12.50 12.70 12.90 13.10 13.30 13.50 13.70 13.90 14.10 14.30 14.50 14.70 14.90

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 1

28P

S T U V W X

Y

TALL

ANT

ROAD

CAST

LEHI

LLR O

AD

MIL

LD A

MRE

MAI

NS

MAM

MOT

HR O

AD





STREAM BED


145

150

155 155

160 160

165 165

170 170

175 175

180 180

185 185

190 190

14.90 15.10 15.30 15.50 15.70 15.90 16.10 16.30 16.50 16.70 16.90 17.10 17.30 17.50

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H( A

LLJU

RISI

DIC T

IONS

)

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 1

29P

Z AA AB AC AD AE

AF

BIDL

EBR

IDGE

ROAD

STAT

ERO

UTE

111





STREAM BED


200 200

210 210

220 220

230 230

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 2

30P

A B

MER

RIM

A CK

ROA D

BRID

G E

CONF

L UEN

CEW

ITH

1% ANNUAL CHANCE BACKWATER FROM SOUHEGAN RIVER





STREAM BED


SOUH

EGAN

R IVE

R

200 200

210 210

220 220

230 230

240 240

6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 2

31P

C

FOOT

BRID

G E

BOST

O NPO

STRO

AD

STAT

ERO

UTE

101





STREAM BED


220 220

230 230

240 240

250 250

13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 2

32P

D E

HORA

CEG R

EELE

YHI

GHW

A Y

MAC

KHI

LLR O

AD

T HOR

NTO N

SFE

R RY

ROAD

CON F

LUEN

CEW

ITH

T RIB

UTA R

YD

STAT

ERO

UTE

101

DAM





STREAM BED


CULVERT

13000

230 230

240 240

250 250

260 260

270 270

280 280

20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 2

33P

F

BOST

O NPO

STRO

AD

BEAV

ERDA

M

CONF

L UEN

CEW

ITH

CULVERT

BOST

O NPO

STRO

AD





STREAM BED


CAES

AR'S

BROO

K

19500

(APP

ROXI

MAT

ELO

CATI

ON)

260

270

280 280

290 290

300 300

310 310

320 320

330 330

340 340

350 350

26000 26500 27000 27500 28000 28500 29000 29500 30000 30500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BEAV

ERBR

OOK

NO. 2

34P

G H I

NEW

B OST

ONRO

AD

NEW

B OST

ONRO

AD

L IM

ITOF

DEAT

ILE D

STUD

Y





STREAM BED


CULVERT

237

239

241 241

243 243

245 245

247 247

249 249

251 251

0 250 500 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH JOE ENGLISH BROOK

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BETT

YSBR

OOK

35P

A B C

D

JOE

ENGL

ISH

B ROO

K

PINE

R OAD

BRID

GE

STAT

EHI

GHW

A Y10

1LEGEND

0.2% ANNUAL CHANCE FLOOD




STREAM BED


CONF

LUEN

CEW

ITH

CULVERT

1% ANNUAL CHANCE BACKWATER FROM JOE ENGLISH BROOK

GREE

L EY

HIGH

WAY

241

243

245 245

247 247

249 249

251 251

253 253

255 255

257 257

259 259

3200 3450 3700 3950 4200 4450 4700

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BETT

YSBR

OOK

36P





STREAM BED


253

255

257 257

259 259

261 261

263 263

265 265

267 267

4500 4750 5000 5250

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BETT

YSBR

OOK

37P

E

STAT

EHI

GHW

A Y10

1

L IM

ITOF

DETA

ILE D

STUD

Y





STREAM BED


CULVERT

GREE

L EY

HIGH

WAY

840

850

860 860

870 870

880 880

890 890

900 900

910 910

920 920

930 930

0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE MOUTH AT SHEDD BROOK

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

B LAC

KPO

NDBR

OOK

38P





STREAM BED


FLOOD PROFILES ARE TOO CLOSETHE 2% AND 1% ANNUAL CHANCE

TO BE SHOWN SEPARATELY

MOU

THA T

SHED

DBR

OOK

880

890

900 900

910 910

920 920

930 930

940 940

950 950

960 960

970 970

0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

B LAC

KPO

NDBR

OOK

39P

A

STAT

ERO

UTE

31





STREAM BED


THE 2% AND 1% ANNUAL CHANCEFLOOD PROFILES ARE TOO CLOSE

TO BE SHOWN SEPARATELYIN THIS AREA

SECO

N DNE

WH A

MPS

H IRE

TUR N

PIKE

900

910

920 920

930 930

940 940

950 950

960 960

970 970

980 980

990 990

0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

B LAC

KPO

NDBR

OOK

40P





STREAM BED


900

910

920 920

930 930

940 940

950 950

960 960

970 970

980 980

990 990

1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

B LAC

KPO

NDBR

OOK

41P

B

C

FOOT

BRI D

GE(B

R EAC

HED )





STREAM BED


910

920

930 930

940 940

950 950

960 960

970 970

980 980

990 990

1000 1000

1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

B LAC

KPO

NDBR

OOK

42P

D





STREAM BED


LIM

ITOF

DETA

ILE D

STUD

Y

260

270

280 280

290 290

300 300

310 310

320 320

330 330

340 340

350 350

0 250 500 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE MOUTH AT PISCATAQUOG RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOG

BRO O

K

43P





STREAM BED

CROSS SECTION LOCATIONA B

1% ANNUAL CHANCE BACKWATER FROM THE PISCATAQUOG RIVER

MOU

THAT

PISC

ATAQ

UOG

RIVE

R

PLEA

S ANT

STRE

ET

280

290

300 300

310 310

320 320

330 330

340 340

350 350

360 360

370 370

3250 3500 3750 4000 4250 4500 4750 5000 5250 5500 5750 6000 6250 6500

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE MOUTH AT PISCATAQUOG RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOG

BRO O

K

44P

C D E

BOG

ROA D





STREAM BED


330

340

350 350

360 360

370 370

380 380

390 390

400 400

410 410

420 420

6500 6750 7000 7250 7500 7750 8000 8250 8500 8750 9000 9250 9500 9750

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH PISCATAQUOG RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOG

BRO O

K

45P

F G

BOG

ROA D

LIM

I TOF

DETA

ILED

S TUD

YLEGEND

0.2% ANNUAL CHANCE FLOOD




STREAM BED


100

110

120 120

130 130

140 140

150 150

160 160

170 170

180 180

190 190

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOW

MAN

B ROO

K

46P

A B C D

E

F G H

ACCE

SSRO

AD

DAM

DAM

SHER

ATON

-WAY

FARE

R

USRO

UTE

3

STAT

ERO

UTE

101

MER

R IM

ACK

R IVE

R

FRED

ERIC

KE

EVER

ETT

TURN

P IKE





STREAM BED


1% ANNUAL CHANCE BACKWATER FROM MERRIMACK RIVER

CONF

LUEN

CEW

ITH

CULVERT

COVE

RED

FOOT

BRID

GE

B UIL

DING

DAM

FIRS

TFL

OOR

ELE V

ATIO

N

CUL

VERT

CULVERT

170

175 175

180 180

185 185

190 190

6500 7000 7500 8000 8500 9000 9500 10000 10500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOW

MAN

B ROO

K

47P





STREAM BED


180

185

190 190

195 195

200 200

205 205

210 210

215 215

220 220

225 225

10500 11000 11500 12000 12500 13000 13500 14000 14500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOW

MAN

B ROO

K

48P

I

STAT

ERO

U TE





STREAM BED


101

CULVERT

200

205

210 210

215 215

220 220

225 225

230 230

235 235

14000 14500 15000 15500 16000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOW

MAN

B ROO

K

49P

J K

OLD

BEDF

ORD

ROAD





STREAM BED


CULVERT

220

225 225

230 230

235 235

240 240

245 245

250 250

255 255

15500 16000 16500 17000 17500 18000 18500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOW

MAN

B ROO

K

50P

L M

N

DONA

LDST

R EET

PRI V

ATE

ROAD

STA T

ERO

U TE





STREAM BED


114

230

235 235

240 240

245 245

250 250

255 255

18000 18500 19000 19500 20000 20500 21000 21500 22000 22500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

BOW

MAN

B ROO

K

51P

O P

LIM

ITOF

DETA

ILE D

STUD

Y





STREAM BED


230

235

240 240

245 245

250 250

255 255

260 260

265 265

270 270

275 275

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH BEAVER BROOK No 2

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HILL

SBOR

OUG H

CO,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

CAES

A RS

B ROO

K

52P





STREAM BED


1% ANNUAL CHANCE BACKWATER FROM BEAVER BROOK NO. 2

BEAV

E RBR

OOK

NO.2

CON F

LUEN

C EW

ITH

SMA L

LFO

O TBR

IDGE

OVER

D AM

S PIL

LWAY

A

255

260

265 265

270 270

275 275

280 280

285 285

290 290

295 295

300 300

6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH BEAVER BROOK No 2

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HILL

SBOR

OUG H

CO,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

CAES

A RS

B ROO

K

53P

B

ROAD

BRID

GEL I

MIT

OFDE

TAIL

E DST

UDY





STREAM BED


MON

TVE

RNON

80

90

100 100

110 110

120 120

130 130

140 140

150 150

160 160

170 170

0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800 5200

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS

F LOO

DPR

O FIL

ES

CHA S

EBR

OOK

54P

A B C

D

PRIV

ATE

DAM

STAT

ERO

UTE

3A





STREAM BED


1% ANNUAL CHANCE FLOOD BACKWATER FROM MERRIMACK RIVER

140

145

150 150

155 155

160 160

165 165

170 170

175 175

180 180

185 185

5200 5600 6000 6400 6800 7200 7600 8000 8400 8800 9200 9600 10000 10400

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS

F LOO

DPR

O FIL

ES

CHA S

EBR

OOK

55P

E F G H

MAR

CLA

N E

DAM

CONF

LUEN

CEO F

CAM

PBEL

LBR

O OK





STREAM BED


150

155

160 160

165 165

170 170

175 175

180 180

185 185

190 190

195 195

10400 10800 11200 11600 12000 12400 12800 13200 13600 14000 14400 14800 15200 15600

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS

F LOO

DPR

O FIL

ES

CHA S

EBR

OOK

56P

I J K

ALBE

QUER

QUE

A VEN

UE

CON F

LUEN

C EOF

TRIB

UTAR

YB1





STREAM BED


155

160

165 165

170 170

175 175

180 180

185 185

190 190

195 195

200 200

15600 16000 16400 16800 17200 17600 18000 18400 18800 19200 19600 20000 20400 20800

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS

F LOO

DPR

O FIL

ES

CHA S

EBR

OOK

57P

L M N O

PILG

RIM

ROAD





STREAM BED


LIM

ITOF

DETA

ILE D

STUD

Y

510

520

530 530

540 540

550 550

560 560

570 570

580 580

590 590

600 600

130.16 130.36 130.56 130.76 130.96 131.16 131.36 131.56 131.76 131.96 132.16 132.36 132.56 132.76

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE NEWBURYPORT LIGHT, MASSACHUSETTS

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

58P

A B

OLD

US20

2&

NH9





STREAM BED


CONF

LUEN

C EOF

SAND

BRO O

K

COUN

TYBO

UNDA

RY

530

540

550 550

560 560

570 570

580 580

590 590

600 600

610 610

620 620

132.76 132.96 133.16 133.36 133.56 133.76 133.96 134.16 134.36 134.56 134.76 134.96 135.16 135.36

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

59P

C D E F

BRID

GEST

R EET

BOS T

ONAN

DM

AIN E

RAIL

ROAD





STREAM BED


COM

PANY

D AM

HILL

S BOR

OUG H

MAN

UFAC

TURI

NG

BEA R

DSBR

O OK

CON F

LUEN

CEOF

540

550

560 560

570 570

580 580

590 590

600 600

610 610

620 620

630 630

135.36 135.56 135.76 135.96 136.16 136.36 136.56 136.76 136.96 137.16 137.36 137.56 137.76 137.96

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

60P

G H I

J





STREAM BED


540

550

560 560

570 570

580 580

590 590

600 600

610 610

620 620

630 630

137.96 138.16 138.36 138.56 138.76 138.96 139.16 139.36 139.56 139.76 139.96 140.16 140.36 140.56

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

61P

K L

M

SECO

N DNE

WH A

MPS

H IRE

TUR N

PIKE





STREAM BED


550

560

570 570

580 580

590 590

600 600

610 610

620 620

630 630

640 640

140.56 140.76 140.96 141.16 141.36 141.56 141.76 141.96 142.16 142.36 142.56 142.76 142.96 143.16

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

62P

N O P Q R S

T

NORT

HBE

NNIN

GTO N

BRID

GE





STREAM BED


560

570

580 580

590 590

600 600

610 610

620 620

630 630

640 640

650 650

143.16 143.36 143.56 143.76 143.96 144.16 144.36 144.56 144.76 144.96 145.16 145.36 145.56 145.76

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

63P

U V W X Y

Z

DEPO

TST

R EET





STREAM BED


CONF

L UEN

CEO F

GREA

TBR

OOK

NO.1

560

570

580 580

590 590

600 600

610 610

620 620

630 630

640 640

650 650

145.76 145.96 146.16 146.36 146.56 146.76 146.96 147.16 147.36 147.56 147.76 147.96 148.16 148.36

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

64P

AA AB

AC

AD AE

AF

AG

AH

STAT

ERO

UTE

31

(HIG

HLE

VEL

B RID

GE)





STREAM BED

CROSS SECTION LOCATIONBO

STON

AND

MAI

N ERA

ILRO

AD

HIG H

GATE

D AM

610

620

630 630

640 640

650 650

660 660

670 670

680 680

690 690

700 700

147.56 147.76 147.96 148.16 148.36 148.56 148.76 148.96 149.16 149.36 149.56 149.76 149.96 150.16

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

65P

AI AJ AK

AL

AM AN AO AP

AQ

AR

BENN

INGT

ONB R

IDGE

MON

A DNO

CKDA

M

POW

D ER

MIL

LDA

M

BOS T

ONAN

DM

AIN E

RAIL

ROAD





STREAM BED


PIER

CEDA

M

640

650

660 660

670 670

680 680

690 690

700 700

710 710

720 720

730 730

150.96 151.16 151.36 151.56 151.76 151.96 152.16 152.36 152.56 152.76 152.96 153.16 153.36 153.56

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

66P

AS AT AU

AV AW

FORE

STRO

AD

CAVE

NDER

R OAD





STREAM BED


630

640

650 650

660 660

670 670

680 680

690 690

700 700

710 710

720 720

153.56 153.76 153.96 154.16 154.36 154.56 154.76 154.96 155.16 155.36 155.56 155.76 155.96 156.16

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

67P

AX

AY





STREAM BED


CONF

LUEN

C EOF

OTTE

RBR

O OK

650

660

670 670

680 680

690 690

700 700

710 710

720 720

730 730

740 740

156.16 156.36 156.56 156.76 156.96 157.16 157.36 157.56 157.76 157.96 158.16 158.36 158.56 158.76

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

68P

AZ BA

BB





STREAM BED


660

670

680 680

690 690

700 700

710 710

720 720

730 730

740 740

750 750

158.76 158.96 159.16 159.36 159.56 159.76 159.96 160.16 160.36 160.56 160.76 160.96 161.16 161.36

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

69P

BC BD BE BF

BG BH

NORT

HVI

LLAG

EDA

M

MA I

NST

REET

TRAN

SCRI

PTDA

M





STREAM BED


U.S.

ROUT

E20

2

CON F

LUEN

C EOF

NUBA

NUSI

TB R

OOK

700

710

720 720

730 730

740 740

750 750

760 760

770 770

780 780

790 790

161.36 161.56 161.76 161.96 162.16 162.36 162.56 162.76 162.96 163.16 163.36 163.56 163.76 163.96

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

70P

BI BJ BK BL

BM

STAT

ERO

UTE

101

MOR

RISO

NR O

AD

NOON

EDA

M

O LD

POW

E RS

BRID

GERO

A D

SHA R

ONRO

AD





STREAM BED


770

780

790 790

800 800

810 810

820 820

830 830

840 840

850 850

860 860

163.96 164.16 164.36 164.56 164.76 164.96 165.16 165.36 165.56 165.76 165.96 166.16 166.36 166.56

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

C ONT

O OCO

OKRI

VER

71P

BN BO

DRUR

YRO

AD





STREAM BED


COUN

TYBO

UNDA

RY

880

890

900 900

910 910

920 920

930 930

940 940

950 950

960 960

970 970

5.45 5.55 5.65 5.75 5.85 5.95 6.05 6.15 6.25 6.35 6.45 6.55 6.65 6.75

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE DEERING CORPORATE LIMITS

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

D EER

ING

RES E

RVOI

R

72P





STREAM BED


DEER

ING

RESE

RVOI

RDA

M

890

900

910 910

920 920

930 930

940 940

950 950

960 960

970 970

980 980

6.65 6.75 6.85 6.95 7.05 7.15 7.25 7.35 7.45 7.55 7.65 7.75 7.85 7.95

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE DEERING CORPORATE LIMITS

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

D EER

ING

RES E

RVOI

R

73P

LIM

ITOF

DETA

ILE D

STUD

Y





STREAM BED


80

90

100 100

110 110

120 120

130 130

140 140

150 150

160 160

170 170

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH BABOOSIC BROOK

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

EAS T

BRA N

CHOF

BABO

OSI C

BRO O

K

74PDI

VERG

ENCE

WIT

HBA

B OOS

ICB R

OOK

FOOT

BRID

G E





STREAM BED


CONF

L UEN

CEW

ITH

BABO

OSIC

BROO

K

1% ANNUAL CHANCE BACKWATER FROM THE MERRIMACK RIVER

700

705

710 710

715 715

720 720

725 725

730 730

735 735

740 740

745 745

17000 17500 18000 18500 19000 19500 20000 20500 21000 21500 22000 22500 23000 23500

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONTOOCOOK RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

FERG

U SON

B ROO

K

75P

A B

C





STREAM BED


LIM

ITOF

DETA

ILE D

STUD

Y

720

725

730 730

735 735

740 740

745 745

750 750

755 755

760 760

765 765

23500 24000 24500 25000 25500 26000 26500 27000 27500 28000 28500 29000 29500 30000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

FERG

U SON

B ROO

K

76P

D E

F

G

STAT

ERO

UTE

137

SAN D

HILL

R OAD





STREAM BED


LIM

ITOF

DETA

ILE D

STUD

Y

445

450

455 455

460 460

465 465

470 470

475 475

480 480

485 485

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GAM

B OL

BROO

K

77P

A

B

GREE

NVIL

LER O

AD

CONF

L UEN

CEW

ITH

STAT

ERO

UTE

31





STREAM BED


SOUH

EGAN

R IVE

R

1% ANNUAL CHANCE BACKWATER FROM SOUHEGAN RIVER

475

480

485 485

490 490

495 495

500 500

505 505

510 510

515 515

2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GAM

B OL

BROO

K

78P

C





STREAM BED


505

510

515 515

520 520

525 525

530 530

535 535

540 540

545 545

550 550

4800 5000 5200 5400 5600 5800 6000 6200 6400 6600 6800

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GAM

B OL

BROO

K

79P

D

RUSS

E LL

HILL

ROAD

DAM





STREAM BED


540

545 545

550 550

555 555

560 560

565 565

570 570

6800 7000 7200 7400 7600 7800 8000 8200 8400 8600 8800 9000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GAM

B OL

BROO

K

80P

E

LIM

ITOF

DETA

ILE D

STUD

Y





STREAM BED


110

114

118 118

122 122

126 126

130 130

134 134

138 138

142 142

146 146

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH BEAVER BROOK NO. 1

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GOLD

ENBR

OOK

81P

A B C

D

CONF

LUEN

C EW

ITH





STREAM BED


BEAV

ERBR

O OK

NO. 2

1% ANNUAL CHANCE BACKWATER EFFECTS FROM BEAVER BROOK NO. 1

114

118

122 122

126 126

130 130

134 134

138 138

142 142

146 146

150 150

1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.10 2.20

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GOLD

ENBR

OOK

82P

E F G

HOBB

SRO

AD

CON F

LUEN

C EOF

CON F

LUEN

C EOF





STREAM BED


1% ANNUAL CHANCE BACKWATER EFFECTS FROM BEAVER BROOK NO. 1

ISLA

NDPO

N DBR

OOK

TAL L

ANT

ROAD

BRO O

K

114

118

122 122

126 126

130 130

134 134

138 138

142 142

146 146

150 150

2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GOLD

ENBR

OOK

83P

H I

CONF

LUEN

C EOF





STREAM BED


SIM

PSON

MIL

LBR

OOK

126

130

134 134

138 138

142 142

146 146

150 150

154 154

158 158

162 162

3.30 3.40 3.50 3.60 3.70 3.80 3.90 4.00 4.10 4.20 4.30 4.40 4.50

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GOLD

ENBR

OOK

84P

J K

MOE

CKEL

ROAD

MOE

CKEL

ROAD

OLD

DAM





STREAM BED


COUN

TYBO

UNDA

RY

COUN

TYBO

UNDA

RY

COUN

TYBO

UNDA

RYCO

N FLU

ENC E

OFLO

WEL

LBR

OOK

270

280

290 290

300 300

310 310

320 320

330 330

340 340

350 350

360 360

0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65

ELEV

ATIO

NIN

FEET

(NAV

D88

)

STREAM DISTANCE IN MILES ABOVE MOUTH AT PISCATAQUOG RIVER

FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

GORH

AMB R

OOK

85P

A B C D E

NORT

HM

AST

ROAD

PARK

ERST

ATIO

NRO

AD





STREAM BED


MOU

THA T

PISC

ATAQ

UOG

RIVE

R

L IM

ITOF

DETA

ILE D

STUD

Y

STAT

ERO

UTE

114

560

570

580 580

590 590

600 600

610 610

620 620

630 630

640 640

650 650

0 250 500 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

G REA

TBR

OOK

NO. 1

86P

A B

C D

WAT

ERST

R EET

CONF

L UEN

CEW

ITH

CON T

OOCO

O KRI

VER

1% ANNUAL CHANCE BACKWATER FROM CONTOOCOOK RIVER





STREAM BED


610

620

630 630

640 640

650 650

660 660

670 670

680 680

690 690

700 700

3250 3500 3750 4000 4250 4500 4750 5000 5250 5500 5750 6000 6250 6500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

G REA

TBR

OOK

NO. 1

87P

E F

G

H I J K

MAI

NST

REET

PRIV

ATE

BRID

GE

PRI V

ATE

DAM

HIG H

STRE

ET

PEDE

S TRI

ANB R

IDGE

VEH I

CLE

BRI D

GE





STREAM BED


650

660

670 670

680 680

690 690

700 700

710 710

720 720

730 730

740 740

4750 5000 5250 5500 5750 6000 6250 6500 6750 7000 7250 7500 7750 8000

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

G REA

TBR

OOK

NO. 1

88P

L M N O P Q

SUM

MER

STRE

ET

DAM

FOOT

BRID

G E

WE S

TST

REET





STREAM BED


670

680

690 690

700 700

710 710

720 720

730 730

740 740

750 750

760 760

6250 6500 6750 7000 7250 7500 7750 8000 8250 8500 8750 9000 9250 9500

ELEV

ATIO

NIN

FEET

(NAV

D88

)


FEDE

RAL

EME R

GENC

YM

A NAG

EMEN

TAG

ENC Y

HIL L

SBO R

OUGH

C OUN

TY,N

H(A

LLJU

RISD

ICTI

ONS )

F LOO

DPR

O FIL

ES

G REA

TBR

OOK

NO. 1

89P

R S

GROV

EST

R EET

DAM





STREAM BED


LIM

ITOF

DETA

ILE D

STUD

Y

hillsborough county, new hampshire

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