2021 - 2023 Annual Storm Drain Repairs

2021-2023 Annual Storm Drain Repairs

On November 9, 2022, the Town Council accept the Basis of Design (BOD) Report's storm drain pipe repair recommendations for the 2021-2023 Annual Storm Drain Repairs Project (CIP 21-205). Twenty two (22) priority storm drain pipe segments were recommended to replaced and now will be engineering designed for repair.

Harris & Associates' sub-consultant, Presidio, began the inspection of approximately 30,000 LF (184 segments) of storm drain pipes. All pipes were inspected per the National Association of Sewer Service Companies (NASSCO) Pipeline Assessment and Certification Program (PACP) condition grading system. The defects within a pipe are graded from 1-5, increasing in severity, with five being the most significant. Grades are assigned based on the significance of the defect, extent of damage, percentage of restriction to flow capacity, and amount of wall loss due to deterioration.

Additional information about BOD report repair recommendations, please see the linked Staff Report and Presentation.

On March 9, 2022, the Town Council approved $334,573 (including 10% contingency) for an engineering design services agreement using ARPA funding with Harris & Associates for the 2021-2023 Annual Storm Drain Repairs Project (CIP 21-205).

Harris's primary project tasks were to complete the following:

Update GIS storm drain maps in accordance with the 2019 Addendum.
Inspect 30,000 linear feet of storm drain to identify deficiencies, defects, obstructions, or potential failures focusing on all corrugated metal pipes (CMP) pipes and storm drain pipes/culverts 36" in diameter and larger on Town-owned property or easements.
Document the conditions of the inspected pipes, and prioritize the repairs to complete repairs on the most vulnerable pipe/culvert segments.
Provide recommendations regarding repairs, replacement, operations, and maintenance; prepare cost estimates for repairs or rehabilitation for each recommended repair segment of the pipe within Public ROW in the form of a Basis of Design (BOD) report.
Develop Plans, Specifications & Estimates (PS&E) for construction based on a $1.3 Million construction budget.

Harris recently completed a draft Basis of Design report documenting the inspection and running closed-circuit television (CCTV) of approximately 30,000 linear feet of storm drain pipe segments. Pipes were assessed for their condition on 1 to 5 grading scale per the National Association of Sewer Service Companies (NASSCO) Pipeline Assessment and Certification Program (PACP). A link below is provide for the results of the Basis of Design report.

Over the next few months, Harris will complete the 65% and 100% design drawings for the construction project. A Request for Construction Bid Proposals for the 2021-2023 Annual Storm Drain Repairs Project work is tentatively scheduled to be released in late February 2023. The goal is to bring the contract award to an April 2023 Council meeting for approval and for construction to begin Summer 2023.

2022-2024 Worst Streets First Pavement Rehabilitation

Storm drain pipes within 2022, 2023, and 2024 Pavement Rehabilitation "Worst-First" projects are being CCTV inspected under those respective projects and will be addressed within the pavement project scope, consistent with past pavement management program practices. A link is below that includes the 2022, 2023, and 2024 Pavement Rehabilitation "Worst-First" List of Street Segments.

2022-24 Pavement Rehabilitation Project Street List

Construction Project Manager - TBD

Contractor - Patrick Madden - TBD

Project Manager - Farah Khorashadi, Town of Moraga- fkhorashadi@moraga.ca.us (925) 888-7023

Basis of Design Report