HomeMy WebLinkAbout09/20/2011, C 3 - SEWERLINE REPLACEMENT 2009-10, SPECIFICATION NO. 90916 1
council M1�rcnng Dare09/20/2011
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C I TY OF SAN LU IS O B 1 S P 0
FROM: Jay D. Walter, Director of Public Works BL
Prepared By: Matt Horn, Supervising Civil Engineer
SUBJECT: SEWERLINE REPLACEMENT 2009-10, SPECIFICATION NO. 90916
RECOMMENDATIONS
1. Approve the plans and specifications for the "Sewerline Replacements 2009-2010" project,
Specification No. 90916.
2. Authorize staff to advertise for bids and authorize the City Manager to award the contract if
the lowest responsible bid is within the Engineer's Estimate of$1,120,000.
DISCUSSION
Background
Replacement of sewage collection pipes is part of an ongoing program to replace aging and
deteriorating infrastructure. This program has several objectives: 1) Ensure reliable removal of
waste; 2) Reduce the need for emergency repairs; 3) Reduce the need for preventive
maintenance; and 4) Ensure uninterrupted sewage flow without health hazard or effluent leakage.
This project will accomplish these objectives for part of the City's wastewater collection system.
The scope of this project includes replacing sewerlines in portions of Pismo, Beach, Islay and
Chorro Streets. The existing sewerlines require a large amount of maintenance and have the need
for more capacity. Portions of the existing sewer system will be upsized from 6" and 8"
diameter pipes to 8", 10" and 12" diameter pipes increasing the systems capacity..
Experience and Reference Requirements
This project will require the contractor to replace these sewerlines using a trenchless process.
The two specified methods of installation are pipe bursting and pipe reaming. Using a trenchless
process will allow for a higher quality seamless pipe to be installed at a lower cost due to the
lower pipe installation cost as compared to conventional trenching.
While the trenchless installation process for sewerline replacement is advantageous in this
situation, it requires a contractor with specific experience and expertise to complete this work. A
contractor with limited trenchless pipe installation experience could damage the sewer system,
cause sewage spills, and increase public inconvenience during the installation process.
For these reasons, staff is planning to request the contractors to submit references documenting
their experience. To comply with a recent legal decision, staff will be using a responsibility
review to determine that experience requirements have been met. Public Works staff will be
working with the City Attorney's office to ensure proper protocols are used. Staff is requesting
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Sewerline Replacement 2009-10, Specification No. 90916 Page 2
the Director of Public Works be authorized to complete responsibility/ qualification hearings in
order to determine if the lowest responsive bid was submitted by a responsible contractor capable
of completing this specialized work. The hearings will allow any contractor initially determined
by the project manager to not have the necessary experience to provide information to the
Director as to why their experience is adequate.
CONCURRENCE
The Community Development Department has given this project a categorical exemption from
environmental review.
FISCAL IMPACT
This sewerline replacement project is originally identified in the 2009-11 Financial Plan and
carried over to the 2011-13 Financial Plan, Appendix B, on page 3-92, which identifies a
$1,300,000 budget estimate for this project. Sufficient funding to support this sewerline
replacement project is available in the Wastewater Collection System Improvements Master
account, which has a current balance of$2,487,356. Staff recommends transferring funding from
the Master Account to the project account at time of contract award, based on construction bid
amounts. Master Account funding is sufficicnt to fund this as well as other projects.
,
Estimated Project Costs
Construction(Engineer's Estimate): $1,120,000
Construction Contingencies: $112,000
Total for Construction: $1,232,000 1
Materials Testing: $10'000
__ ....
Miscellaneous (incl printing) - — —' $500
�.__ _..
Total for other costs: $10,500
Total Cost of Project $172429500 1
Master Collect S st Account 90239 $2,487,356
Available Funding:
ATTACHMENT
Vicinity Map
AVAILABLE FOR REVIEW IN THE COUNCIL OFFICE
Plans and Special Provisions
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san Public Works Department 2009-10 SEWERLINE
919 Palm street, San Luis Obispo, CA 93402 REPLACEMENT PROJECT
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