TO:Andrew P. Powers, City Manager
FROM:Clifford G. Finley, Public Works Director
DATE:April 9, 2024
SUBJECT: Thousand Oaks Boulevard Wastewater Pipe and Maintenance Hole Lining Project (CI 5686)
RECOMMENDATION:
1. Re-authorize staff to advertise the Thousand Oaks Boulevard Wastewater Pipe and Maintenance Hole Lining Project (CI 5686) for construction bids.
2. Find that the Project is categorically exempt from the California Environmental Quality Act (CEQA) pursuant to 14 CCR 15301.
FINANCIAL IMPACT:
No Additional Funding Requested. Minimal staff time and costs required to advertise for bids are included in the Adopted FY 2023-24 Wastewater Capital Fund Budget. $4,650,000 is included in the Adopted FY 2023-24 Wastewater Capital Fund Budget. Estimated project costs total $6,631,670. Additional funding for construction will be requested at the time of construction contract award depending on bids received.
BACKGROUND:
The City provides wastewater service to nearly 38,000 customers, representing more than 100,000 residents. The Public Works Department maintains 415 miles of wastewater pipelines and 8,300 maintenance holes in the City’s wastewater system. Wastewater pipelines and maintenance holes are video-inspected on an ongoing basis to identify issues, including deteriorated conditions that warrant refurbishment.
One method for addressing aging conditions in the wastewater collection system is via lining technology. Since the start of the City’s wastewater lining program in 2002, more than 26.5 miles of pipeline and over 700 maintenance holes have been rehabilitated using the lining method.
TOB Wastewater Pipe and Maintenance Hole Lining Project (CI 5686) April 9, 2024
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5 On July 18, 2023, City Council authorized this lining project to be advertised for bids with the project limits along Thousand Oaks Boulevard (TOB) from Moorpark Road to Conejo School Road. Advertising of the project for construction bids was postponed to allow time to extend the design of easterly project limits on TOB to Duesenberg Drive, which added the rehabilitation of an additional 4,700 linear feet of wastewater pipelines and an additional 17 maintenance holes to the project. The added scope is needed because of the accelerating deterioration of the existing pipeline that was observed by City staff during review of the condition assessment videos.
In October 2023, a Task Order for $21,670 was issued to Utility Systems Science & Software to perform wastewater flow monitoring at several maintenance holes at key locations within the project limits. This work has been completed and the flow data obtained will be used by the selected contractor in their final layout of the temporary wastewater bypass system during construction.
DISCUSSION/ANALYSIS:
Staff has identified approximately 14,300 linear feet (2.7 miles) of deteriorated wastewater pipelines and 56 maintenance holes along TOB between Moorpark Road and Duesenberg Drive that require protective lining (Attachment #1). Major sections of TOB within the limits of this project are scheduled to receive pavement resurfacing treatment as part of the 2026 citywide pavement rehabilitation program. The lining work needs to be completed in advance of the paving project due to required trenching for the installation of the wastewater flow bypass system.
The wastewater lining project will improve the performance, integrity, and longevity of the City’s wastewater system, which will help avoid more expensive replacements in the future. The lining system consists of cleaning wastewater lines, cutting/removal of tree roots, and lining the pipes with a Cured-in-Place Pipe (CIPP) System. The rehab of the wastewater maintenance holes includes the removal of ladders to improve access safety, application of gunite/mortar, and installation of polyurethane protective lining.
The project plans and specifications have been completed in-house by City staff and are available for review upon request to the Public Works Department by email at [email protected] or by phone at (805) 449-2400.
Staff recommends that the revised project be advertised for bids. Once bids are received, staff will make a recommendation at a future City Council meeting for the award of the construction contract.
TOB Wastewater Pipe and Maintenance Hole Lining Project (CI 5686) April 9, 2024
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5 The estimated costs for the project are as follows:
Wastewater Flow Monitoring
Construction (including contingency)
$ 21,670
$ 6,600,000
City Furnished Materials/Services $ 10,000
Total Estimated Project Cost $ 6,631,670
The tentative schedule for completion of the project is as follows:
Bid Process Spring 2024
Start of Construction Summer 2024
Project Completion Summer 2025
The project is categorically exempt from CEQA per Section 15301 (repair/maintenance of an existing facility).
Community Outreach: Staff has established a public outreach plan for the project, with a particular focus on the residents and businesses located adjacent to the project as well as the public. Various communications tools and strategies, including community meetings (if needed), press releases, website updates, and social media posts will continue to be utilized to inform the public and receive feedback.
This project meets City Council’s FY 2023-24 Top Ten Priorities #6, “Public Works + Infrastructure Investments”.
CIP PROJECT PRIORITY (as outlined in FY 2023-24 and FY 2024-25 CIP Program Budget)
Priority Two – Necessary, but not essential, and there could be consequences if deferred.
COUNCIL GOAL COMPLIANCE:
Meets the following City Council goals:
C. Operate City government in a fiscally and managerially responsible and prudent manner to ensure that the City of Thousand Oaks remains one of California's most desirable places to live, work, visit, recreate, and raise a family.
TOB Wastewater Pipe and Maintenance Hole Lining Project (CI 5686) April 9, 2024
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5 F. Provide and enhance essential infrastructure to ensure that the goals and policies of the Thousand Oaks General Plan are carried out and the City retains its role and reputation as a leader in protecting the environment and preserving limited natural resources.
PREPARED BY: Gareth Madrid, Engineering Assistant
Attachments:
Attachment #1 – Vicinity and Location Maps
DPW:1030-20\\ev\Council\2024\040924\CI 5686\TOB Wastewater Pipe and Maint Hole Lining Project staff report.docx