Item 4 - Acceptance of Sewer Line Repair Replace Bid No. 21-017, with DB Pipeline, Inc., as CompleteAugust 2, 2022, Item #4DATE: TO: FROM: CONTACT: SUBJECT: Summary: AGENDA REPORT CityofPoway August 2, 2022 Honorable Mayor and Members of the City Council Robert Manis, Director of Development Services fAJ\ Andrea Thomas, Associate Civil Engineer~ (858) 668-4605 or athomas@poway.org CITY COUNCIL Acceptance of the Sewer Line Repair Replace 20/21 (Pomerado Road/Stone Canyon Road) project; Bid No. 21-017, with DB Pipeline, Inc., as Complete On June 15, 2021 the City Council awarded the contract for the Sewer Line Repair Replace 20/21 (Pomerado Road/Stone Canyon Road) project; Bid No. 21-017, to DB Pipeline, Inc., in the amount of $287,297.00. This action will accept the project as complete. Recommended Action: It is recommended the City Council: (1) Accept the Sewer Line Repair Replace 20/21 (Pomerado Road/Stone Canyon Road) project as complete; (2) Authorize the City Clerk to file and record the Notice of Completion; (3) Authorize the release of the retention in the amount of $13,785.29, if unencumbered, 45 days after City Council acceptance; (4) Release the North American Specialty Insurance Company Bond for Material and Labor in the amount of $287,297.00 after the release of retention; and (5) Retain the North American Specialty Insurance Company Bond for Faithful Performance for a period of one year. Discussion: The Sewer Line Repair Replace 20/21 (Pomerado Road/Stone Canyon Road) project replaced 131 feet of dilapidated clay sewer pipe, constructed a new manhole, and installed 1,037 feet of protective liner. A portion of the project was performed within the City of San Diego right-of-way on a sewer utility owned by the City of Poway. This project was a continuation of the Sewer Line Repair Replace 14/15 (Pomerado Road/Stone Canyon Road). The original construction was deemed unfeasible to complete due to conflicts with unknown utilities and rock obstructions. This revised project scope repaired sags in the existing lines and constructed a drop manhole to eliminate a problematic vertical anomaly. In addition to the repairs in Pomerado Road, a separate 8-inch collector sewer line in a nearby sewer easement had 55 1 of 2
August 2, 2022, Item #4feet of failing pipe replaced. A structural liner was added to the existing clay pipes resulting in increased longevity and resilience required to machine clean the pipe without causing damage. The project cost covered pipe repairs, sewer manhole installation, sewer bypassing, pipe liner installation, traffic control, and restoration of surface improvements. There were two change orders for this project, the sum of which decreased the contract amount by $11,591.30. The change orders included additional costs for an increased length of repairs added to the contract, costs related to a change in design due to unforeseen conditions, and a credit for work no longer needing to be performed. The quantity of pipe repairs differed from the plan due to conservative estimation during design of the extent of damaged pipe and the condition of the nearest pipe joint to connect new pipe. The design change was a result of groundwater conditions and unforeseen proximity of adjacent utilities. The final contract amount is $275,705.70. Environmental Review: The matter of acceptance of public improvements that have been completed, which were the subject of a prior environmental determination, is not subject to the California Environmental Quality Act. Fiscal Impact: Sufficient funds are available in the Project account (SWR0001) for the release of retention. Funds remaining in the project after acceptance will be returned to the sewer enterprise fund (5200) for future projects. Public Notification: None. Attachments: None. Reviewed/ Approved By: Assistant City Manager 2 of2 Reviewed By: Alan Fenstermacher City Attorney City Manager