monthly construction progress report: september 2018

Monthly Construction Progress Report: September 2018

Trampas Canyon Dam and Reservoir Project No. C-1773

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CONTRACT SUMMARY

• The contract status through September 30, 2018 is provided below. It summarizes project cost details and time constraints.

Trampas Canyon Dam and Reservoir

PROJECT SUMMARY

• Notice to proceed was issued January 30, 2018.

• DSOD foundation approvals this month include Main Dam Downstream Shell Foundation up to elevation 447 ft and East Saddle Downstream Shell and Core Foundation up to elevation 562 ft. DSOD has been fully aware of all pertinent issues and submittals/RFIs warranting their input. The CM Team has developed a very good rapport and level of trust with DSOD.

• Embankment fill activities continued this month at the Main Dam in the locations approved by DSOD to include downstream filter and drainage blanket/chimney and Zone 2A shell. East Saddle Dam embankment fill activities continued this month to include downstream filter and drainage blanket/chimney, upstream/downstream shell, and core placement. Import material quality remains to be consistent.

• Microtunneling activities continued this month for the 63” inlet/outlet casing.

• Emergency outlet structure concrete activities were ongoing this month to include slab placement and wall forming/rebar.

• Two change orders have been added to the Project to date.

o CO - 1. One no-cost change order has been added to the project (Current Davis-

Bacon Wage Determination). The contract sum remains at the original bid amount of $82,289,000.00.

o CO - 2. One overall deductive change order has been added to the project (Delta

3 cost changes, Additional Main Dam excavation quantities, Miscellaneous work items previously in the contingency, and incorporation of the EIR addendum). This

30 4.4% 243 34.5% 462 65.5%

(1,201,645.00) -1.5% 20,240,093.99 25.0% 60,847,261.01 75.0%

Project No. Date of Award Notice to Proceed

Original Contract

Duration (CD) Original Completion Date

90 4/4/2020

Billed to Date ($) Amount Remaining ($)

# of Potential Issues

Potential Change Order

Amount ($) Total Exposure ($) Potential Delays (CD)

Potential Completion

Date

82,289,000.00 81,087,355.00

Original Contract Amount

($) Change Orders to Date ($)

Revised Contract Amount

($)

12/6/2019

705 1/5/2020

C-1773 11/8/2017 1/30/2018 675

Approved Time Extension

(CD)

Revised Contract

Duration (CD) Revised Completion Date

Elapsed Contract Time

(CD)

Contract Time Remaining

(CD)

4 1,500,000.00 82,587,355.00



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results in a total deduction of ($1,201,645.00). The contract sum is adjusted to $81,087,355.00.

o Confirmed cost impact is pending relative to the East Saddle Dam and Main Dam

Embankment fill quantity assumptions. This is the largest change in cost item of which the District is aware to this point and has been noted in the prior monthly reports. Competent bedrock foundation elevations were deeper than expected in many areas, therefore more fill is needed to make up the additional voids. Additional fill consists of three different imported materials and two types of material form onsite borrow areas. Final additional quantities will be verified, and additional time will be granted near the end of the activity, which will occur much later in the project. The cost of this additional work will not be known until that time but is projected to be in the order of approximately $1M for the East Saddle Dam, and approximately $2M for the Main Dam.

o Multiple cost impacts are being tracked on a force account/time and materials basis to help keep work progressing in a logical manner and assist in the mitigation of delays. Other potential cost changes are being evaluated by estimates that are being submitted by the Contractor or are forthcoming from the Contractor. The listing of multiple potential cost change items that the CM Team is tracking is contained in attached Appendix 1. Much of the CM effort on this project is attributed to addressing and resolving potential delays and changes in project costs. Change Orders, both additive and deductive, will eventually be issued to capture the items listed in the Appendix 1 tabulation. The tabulation will be an evolving document.

▪ Several miscellaneous design changes were officially issued as Delta 4 on

April 20, 2018. The aggregate cost of these changes is expected to be $100,000 or less. Sukut to provide cost proposal for review.

▪ Additional miscellaneous design changes are being addressed and

released as Delta 5 and 6 as they have become available. The aggregate cost of these changes has yet to be determined but each individual item is being tracked on a shared spreadsheet. See attached log included as Appendix 1.

▪ Several RFIs have been submitted with responses that require revisions to

the Plans/Specifications. Some of these RFIs which include items that will be added costs, however some are credit items. These are also being tracked in Appendix 1 and will be addressed at the appropriate times.

o The progress of construction is currently behind schedule by approximately four

months due to differing site conditions related to bedrock locations at the East Saddle Dam and the Main Dam.

o The presence of RMV Cattle on the jobsite continues to be a concern for safety,

cost, and work efficiency.



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o The project is currently projected to conclude at or before early April 2020.

COST MONITORING

• Graphical cost analysis for General Contractor:



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• Graphical cost analysis for principal consultants:

Current Month To Date Total Contract

128,000$ 1,389,586$ 3,039,065$

-$ 2,557,656$ 2,764,512$

122,710$ 797,759$ 1,257,666$

3,323$ 79,689$ 134,750$

-$ 37,438$ 110,058$

Leatherman Bioconsulting Inc.

Dudek & Associates Inc.

Work Billed By Month

Butier Engineering Inc.

URS/AECOM

GMU Geotechnical Inc.

$-

$500,000

$1,000,000

$1,500,000

Ap

r-1

7

Ma

y-1

7

Jun

-17

Jul-

17

Au

g-1

7

Sep

-17

Oct

-17

No

v-1

7

Dec

-17

Jan-

18

Feb

-18

Mar

-18

Ap

r-1

8

Ma

y-1

8

Jun

-18

Jul-

18

Au

g-1

8

Sep

-18

$-

$500,000

$1,000,000

Ap

r-1

7

May

-17

Jun

-17

Jul-

17

Au

g-1

7

Se

p-1

7

Oct

-17

Nov

-17

De

c-1

7

Jan

-18

Fe

b-1

8

Mar

-18

Ap

r-1

8

May

-18

Jun

-18

Jul-

18

Au

g-18

Se

p-1

8

$-

$1,000,000

$2,000,000

$3,000,000A

pr-

17

May

-17

Jun

-17

Jul-

17

Au

g-1

7

Sep

-17

Oct

-17

No

v-1

7

De

c-1

7

Jan-

18

Feb

-18

Mar

-18

Ap

r-1

8

May

-18

Jun

-18

Jul-

18

Au

g-18

Sep-

18 $-

$50,000

$100,000

Ap

r-17

May

-17

Jun

-17

Jul-

17

Au

g-17

Se

p-1

7

Oct

-17

No

v-17

De

c-1

7

Jan-

18

Feb-

18

Mar

-18

Ap

r-18

May

-18

Jun

-18

Jul-

18

Au

g-18

Se

p-1

8

$- $10,000 $20,000 $30,000 $40,000

Ap

r-17

May

-17

Jun

-17

Jul-

17

Au

g-1

7

Sep-

17

Oct

-17

Nov

-17

Dec

-17

Jan-

18

Fe

b-1

8

Mar

-18

Ap

r-18

May

-18

Jun

-18

Jul-

18

Au

g-18

Sep-

18



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• Tabular cost listing for all project costs:

Project Costs by Vendor To Date

Vendor Balance

ARC-American Reprographics Co. $ 18,784.27

Archaeological Resource 13,261.60

AT&T 98,680.12

Best, Best & Krieger 17,558.51

Butier Engineering Inc. 1,389,586.00

Dams-State of CA Division of Safety 433,895.00

Department of Water Resources 31,604.00

Dudek & Associates Inc. 40,761.08

Eurofins Eaton Analytical Inc. 3,800.00

Glenn Lukos Associates 33,255.72

GMU Geotechnical Inc. 870,550.04

Huitt-Zollars Inc. -

Ibeam Construction Cameras 19,906.99

Joey Soto 4,999.05

Leatherman Bioconsulting Inc. 76,365.52

Murow CM 18,925.00

Northstar Surveys Inc. 6,385.00

Olaunu, LLC 15,000.00

Payroll & Burden 193,542.70

Power Plus 72,823.83

Psomas 220,425.64

San Diego Gas & Electric 297,226.00

San Diego Regional Quality Board 600.00

Sierra Analytical Labs 20,114.60

State Water Resources Control Board 60,108.00

Sukut Construction Inc. 21,435,127.03

SWRCB Accounting Office 7,177.00

Sycamore Valuation 2,500.00

URS/AECOM 2,557,656.09

Xylem Dewatering Solutions Inc. 83,226.86

$ 28,043,845.65



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PROJECT COMMUNICATION

• Thirty-nine Weekly Construction Progress Meetings have been held since the Notice of Award was issued for November 8, 2017.

• Itemized action items and topics are summarized in the Progress Meeting Minutes. Specific items to note for this month include the following:

o Import materials are consistently being delivered with high quality and there have

been minimal issues with failing test results. Any direct costs realized from previously discussed reports will be included in a forthcoming credit change order.

o The project delivery team is addressing multiple issues on a daily basis to mitigate schedule and cost impacts.

• RMV has been highly encouraged to remove its cattle from the jobsite (District property). RMV has yet to effectuate this.

SUBMITTALS

• 196 submittals have been received from Sukut Construction. 8 remain under review by AECOM.

REQUESTS FOR INFORMATION

• 163 requests for information (RFIs) have been received from Sukut Construction. 1 RFIs remain open and await responses.

STORM WATER POLLUTION PREVENTION PLAN

• SWPPP monitoring conducted by Sukut personnel. REAP report received for all rain events, with permanent BMPs currently being installed. Current on all required SWPPP paperwork.

SEPTEMBER ACCOMPLISHMENTS

Construction activity in September consisted of subsurface water dewatering at the Inlet/Outlet sump, continue placement of downstream Zone 2A and import Zone materials at Main Dam, continue placement of downstream Zone 2A, import Zone materials and Zone 1A Core at East Saddle Dam, complete installation of seepage drainage system at Main Dam, form and place rebar for the Emergency Outlet Structure wing walls, and continue microtunnel for inlet/outlet piping.

o Place concrete at Emergency Outlet Structure works slab and wing walls. o Form and place rebar for Emergency Outlet Structure works vault walls.



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o Microtunnel Boring Machine in place and drilling tunnel o Main Dam seepage drainage system installed o Dewatering Activities

▪ Ongoing dewatering at future Inlet/Outlet sump o Embankment

▪ East Saddle Dam downstream shell and core embankment fill placement continued. Zones 1A, 2A, 6A, 7, and 6B being placed continuously

▪ Main Dam downstream embankment fill placement continued. Zones 2A, 6A, 7, and 6B being placed continuously

• A double shift started on this particular activity on September 17th which consists of a 10-hour day shift and a 9-hour night shift ending at 3:30 am. The double shifting is anticipated to continue for about one year.

ANTICIPATED WORK FOR OCTOBER 2018

• East Saddle Dam Embankment fill activities will continue.

• Main Dam embankment fill activities will continue.

• Main Dam and East Saddle Dam weir vaults to be installed

• Emergency Outlet Structure construction will continue with the structure walls to be completed in October.

• Microtunnel operations will continue with microtunnel casing drive to compete in October. It is anticipated that the casing will be installed, and the carrier pipe installation will be through November.

• CML&C pipe installation to begin towards the end of October during swing shift operations.

• Dam Control Building excavation and foundations will begin.

• Continue Dewatering as needed.



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Microtunnel Boring Machine Cutterhead

Laborers place filter material at East Saddle Dam



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RMV cattle when Sukut stopped for lunch

Reinforcement placed, and slab formed at Emergency Outlet Structure



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Sukut Subcontractor in Microtunnel Launch Pit

Microtunnel Operator Control Center



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AECOM & GMU Test Pit at East Saddle Dam to Inspect Material Placement

Microtunnel Separation Plant



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Emergency Outlet Structure Concrete Reinforcement Placed and Slab Formed for Concrete

Placement

Main Dam Choker Zone Material Placement



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42-in and 24-in RCP Manhole junction

Telebelt Material Placement Truck for East Saddle Dam – Experimental Placing method by

Sukut



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Telebelt Conveyor Install Zone 6B Material at East Saddle Dam Chimney

Barrel Vault for Manhole #2



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Concrete Placement for Emergency Outlet Structure Slab

East Saddle Dam Overview



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Laborers Clean Bedrock Downstream of Core at East Saddle Dam

Placing and Compacting 2A Shell at Main Dam



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East Saddle Dam

Manhole #2 Poured for RCP Seepage Drain Connection Point



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Removing Forms at Emergency Outlet Structure Cutoff Wall

Main Dam Swing Shift Equipment with Lights and Light Towers to Illuminate Work Area



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Laborers Shovel Zone Material at East Saddle Dam Upstream Northside of Core

Laborers Placing 6B Material with Headlamps to aid in Illumination of Work Area



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Laborers Clean Bedrock at Western Side of Main Dam

Sukut Pipe Crew Installing 42-in RCP Seepage Drain



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DSOD Inspection of Main Dam

Main Dam Eastern Canyon



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Main Dam Eastern Canyon Filter Material Placement

East Dam Loader Placing Filter Materials at Bedrock



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Sukut Laborers Place Zone 6B Materials at Main Dam

Loader Placing Zone 7 Material at Main Dam



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APPENDIX 1

C-1773 Trampas Canyon Dam & Reservoir Issue and Cost Tracker



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monthly construction progress report: september 2018

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