WD-2498, New Crystal Springs Bypass Tunnel

San Francisco
Water
Sewer
AGENDA ITEM
Public Utilities Commission
City and County of San
Francisco
SoWCM ol t h . San Francisco Puttie UUIitlm Commlulon
DEPARTMENT Infrastructure
12
AGENDA NO.
MEETING DATE
September 27,
2011
Construction Closeout: Consent Calendar
Project Manager: Husam Masri
Contract No. WD-2498. Closeout, New Crystal Springs Bypass Tunnel
Summary of
Proposed
Commission Action:
•
Background &
Description of Scope
of Work:
Accept the work performed by Shank/Balfour/Beatty, J.V., for Water
Enterprise, Water System Improvement Program (WSIP)-funded
Contract No. WD-2498, New Crystal Springs Bypass Tunnel, for
construction of a tunnel with two shafts; approve Modification No. 1,
increasing the contract by $1,735,887 for a total contract amount of
$57,409,887 with no time extensions; and authorize the final payment
to the Contractor. Modification No 1 is comprised of thirty-four (34)
change orders, which address credits for installation of new valves,
additional soil investigations, environmental mitigation measures, and
design changes due to differing site conditions. The total of all
change orders represents a 3.12% increase over the original contract
amount.
Background:
The New Crystal Springs Bypass Tunnel (NCSBT) is one of the
regional seismic upgrade projects included in the SFPUC's Water
System Improvement Program (WSIP). The N C S B T reinforces a
critical segment of the Hetch Hetchy Regional Water System to
provide reliable water delivery from Hetch Hetchy and East Bay
reservoirs to northern San Mateo County and the City of San
Francisco. This project was necessary to address both the lack of a
redundant conduit in a portion of the system that is within the
influence zone of the San Andreas Fault as well as vulnerabilities
associated with potential landslides in that area. A landslide that
occurred during the winter of 1996-1997, along the northeast side of
Polhemus Road in San Mateo County, threatened the structural
integrity of a portion of the existing Crystal Springs Bypass Pipeline
(CSBP). The potential for re-occurrence of landslides (resultant from
APPROVAL:
DEPARTMENT/
BUREAU
COMMISSION
SECRETARY
FINANCE
Mike Housh
Todd L. Rydstrom
li^af***
Harrington
Contract: WD-2498, New Crystal Springs Bypass Tunnel
Commission Meeting Date: September 2 7 , 2011
seismic activity or excessive wet weather) along Polhemus Road
raised concerns regarding system reliability for the existing CSBP.
Due to these concerns, studies were initiated and alternatives
evaluated to replace/repair the existing pipeline; the construction of a
tunnel was determined to be the preferred alternative.
Description of Scope of Work:
Construction contract work is located in the vicinity of the
decommissioned Polhemus Fluoridation Station, along Polhemus
Road in San Mateo County. The work under this contract consisted
primarily of the construction of a tunnel with two shafts, one at each
end of the tunnel.
Scope of Work under this Contract included the following:
• Excavation and construction of approximately 4,200-ft
tunnel, including two shafts, North and South;
•
•
Installation of initial tunnel lining (pre-cast reinforced
concrete segments) and final tunnel lining (96-in diameter
steel pipeline) in the tunnel and shafts;
•
Grouting and backfilling of voids between the two linings
in the tunnel and shafts;
•
Excavation and construction of valve vaults, installation of
valves, communication for control and monitoring systems,
and emergency power system;
•
Connection of the new tunnel and pipelines to the existing
Crystal Springs Bypass Pipeline and Tunnel, Sunset
Supply Pipeline, and Crystal Springs Pipeline No. 2;
•
Modification of existing drainage system and realignment
of existing roadway; and
•
Installation of new security fences and other miscellaneous
site improvements.
Changes to the Contract under Modifications:
Modification No. 1: was issued for an additional $1,735,887 to
address credits for installation of new valves, additional soil
investigations, environmental mitigation measures, and design
changes due to differing site conditions, increasing the total contract
value to $57,409,887.
Result of Inaction:
A delay in closing out this contract will delay the final payment due to
the Contractor.
Budget & Costs:
Funding: is within the Project No. CUW35601, New Crystal Springs
Bypass Tunnel
Original Award Amount: $55,674,000
Modification No. 1 Amount:: $1,735,887
Total Revised Contract Amount: $57,409,887
Contract: W D - 2 4 9 8 , New Crystal Springs Bypass Tunnel
Commission Meeting Date: September 27, 2011
The Total Modifications Amount of $1,735,887 represents 3.12% of
the Original Contract Amount, which is well below the standard 10%
construction contingency level allocated to WSIP projects.
Schedule:
Notice-To-Proceed Date: December 1, 2008
Original Contract Duration: 2 years and 256 consecutive calendar
days
Actual Contract Duration: 2 years and 256 consecutive calendar
days
Compliance With
Chapter 14b: Local
Business Enterprise
And NonDiscrimination In
Contracting
Ordinance:
The Contractor has met the Human Rights Commission (HRC) Local
Business Enterprise (LBE) subcontracting goal of 4.0% by utilizing a
total of 4.8% L B E participation.
Recommendation:
SFPUC staff recommends that the Commission adopt the attached
resolution.
Attachments:
1. SFPUC Resolution
2. H R C memo
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
W H E R E A S , Construction has been completed for Water Enterprise, Water System
Improvement Program (WSIP)-funded Contract No. WD-2498, New Crystal Springs Bypass
Tunnel in San Mateo County, by the Contractor, Shank/Balfour/Beatty, J.V.; and
W H E R E A S , On October 14, 2008, by Resolution No. 08-0182, this Commission
awarded Contract No. WD-2498, New Crystal Springs Bypass Tunnel to the lowest, qualified
responsible and responsive bidder, Shank/Balfour/Beatty, J.V.; and
W H E R E A S , The original contract amount was for $55,674,000 and the original contract
duration was 986 consecutive calendar days; and
WHEREAS, The construction contract Notice To Proceed (NTP) date was set for
December 1, 2008, with an original schedule of 986 consecutive calendar days and the contract
work was completed in 986 consecutive calendar days on August 12, 2011; and
W H E R E A S , Modification No. 1 was issued for an additional $1,735,887 to address
credits for installation of new valves, additional soil investigations, environmental mitigation
measures, and design changes due to differing site conditions, increasing the total contract
amount to $57,409,887 with no time extension; and
W H E R E A S , The Human Rights Commission (HRC) determined that the Contractor met
the established 4.0% Local Business Enterprise (LBE) subcontractor participation goal by
utilizing a total of 4.8% L B E participation; and
W H E R E A S , Funds are available from Project No. CUW35601, New Crystal Springs
Bypass Tunnel; now, therefore, be it
R E S O L V E D , That this Commission hereby accepts work performed by
Shank/Balfour/Beatty, J.V. for Water Enterprise Water, System Improvement Program-funded
Contract No. WD-2498, New Crystal Springs Bypass Tunnel, for construction of a tunnel with
two shafts; approves Modification No. 1 (Final), increasing the contract by $1,735,887 for a total
contract amount of $57,409,887 and with a total contract duration of 986 consecutive calendar
days; and, authorizes final payment to the Contractor.
J hereby certify that the foregoing
Commission
at its meeting of
resolution
Secretary,
was adopted by the Public
September 27, 2011
Public Utilities
Utilities
Commission
City and County of San Francisco
Human Rights Commission
Edwin M. Lee
Mayor
Contract Compliance
Dispute Resolution/Fair Housing
Small and Micro Business Enterprise
Lesbian Gay Bisexual Transgender & HIV Discrimination
Theresa Sparks
Executive Director
MEMORANDUM
Date:
September 23, 2011
To:
Husam Masri, SFPUC
Pauline Lam, SFPUC
From:
Amy McConnell, HRC
Subject:
HRC Closeout of WD-2498 (New Crystal Springs Bypass Tunnel)
Human Rights Commission ("HRC") staff has completed the review of the relevant documents for the
above-referenced project. The L B E subcontracting participation goal for this project is 4% of the total
value of the entire project.
Based upon its review, H R C verifies the following L B E subcontractor participation.
Firm
Cowhey Pacific
Drilling
Ronald R. Nelson
Contractor
Eighteen Trucking
Co.
Scope of Work
Furnish Tunnel
Segments
Form and Place
Vault Concrete
On Highway
Trucking and
Exc. Disposal
TOTAL
Status
Original Credited
Contract
Participation
Final Actual Credited
Contract
Participation
$1,805,106.00
3.1%
1.4%
$871,822.42
1.5%
$300,796.00
0.5%
$89,198.50
.2%
$3,618,311.00
6.4%
$2,766,126.92
SF L B E - O B E
$2,551,382.00
SF L B E - O B E
$766,133.00
SF-LBEMBE
4.5%
In a meeting with SFPUC, HRC confirmed that the costs for Cowhey Pacific's scope of work were less
than originally estimated. Accordingly, the final contract amount for Cowhey Pacific is less than the
original contract amount.
In addition, documentation from the SFPUC confirms that Eighteen Trucking's scope of work
substantially decreased due to a change order issued by the SFPUC after the contract commenced.
Finally, in good faith, prime contractor Shank/Balfour Beatty, J.V. added L B E subcontractor A G S , Inc.
("AGS") to the contract after it commenced. A G S performed geologic services for $135,653.00, which
constitutes .24% of the total value of the entire contract.
Based upon the aforementioned review, H R C concurs with the closeout of this contract.
R
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