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Consent-Community Services   # 9.
Board of Supervisors
Integrated Waste Management
Meeting Date:
07/22/2025
Brief Title
Approve plans and specifications for construction of the next landfill module
From:
Stephanie Cormier, Interim Director, Department of Community Services
Staff Contact:
Jeff Kieffer, Principal Civil Engineer, Department of Community Services, x8855
Supervisorial District Impact:
District 3

Subject

Adopt plans and specifications for the construction of Waste Management Unit 7J Base Grading Plan at the Yolo County Central Landfill. (No general fund impact) (Cormier/Kieffer)

Recommended Action

  1. Adopt plans and specifications for the Construction of Waste Management Unit 7J Base Grading Plan; 
     
  2. Authorize the Director of the Division of Integrated Waste Management to finalize the plans and specifications and sign the Notice to Contractors; 
     
  3. Authorize the Division of Integrated Waste Management to advertise for competitive bids; 
     
  4. Authorize the Director of the Division of Integrated Waste Management to execute a construction contract with the lowest responsive and responsible bidder, provided the contract amount does not exceed available funds, or to reject all bids; and 
     
  5. Authorize the Director of the Division of Integrated Waste Management to approve all change orders up to the maximum amount allowable under State law, provided the total contract amount does not exceed the available funds for this project.

Strategic Plan Goal(s)

Sustainable Environment
Operational Excellence

Reason for Recommended Action/Background

Prior to placement of waste in any Waste Management Unit (WMU), a containment system must first be constructed to protect groundwater below the landfill.   This containment system generally consists of layers of general soil fill, compacted clay, geomembrane (thick plastic) and drainage layers.  Construction of these new modules at the Yolo County Central Landfill (Landfill) requires significant amounts of soil (approximately 30,000 cubic yards per acre) due to the relatively shallow groundwater at the site.  Because of this, the overall project is being split up into two phases.  This first phase is limited to soil placement to construct the subgrade for the next module, which in some areas is up to 20-feet thick. This work constitutes the attached plans and specifications for approval.  Construction will occur during fiscal year 2025/2026, tentatively September through November.

A subsequent set of plans and specifications (Phase 2) will be presented to the Board later this year with the remaining portions of construction occurring during the summer of 2026.  Phase 2 of the project will require review and approval of the plans and specifications by the Central Valley Regional Water Quality Control Board (Regional Board).  The Phase 2 plans and specifications are nearly complete and will be submitted to the Regional Board later this month.   Phase 2 will include placement of the compacted clay liner, geomembrane (thick plastic) and drainage layers.  The construction schedule for the second phase will include procurement of the geomembrane and geosynthetic components this winter with construction beginning in the spring of 2026.

The plans and specifications were prepared by WSP, Inc. under an agreement approved by the Board on December 15, 2020, and in accordance with the requirements set forth in Title 27 of the California Code of Regulations. 

The engineer's estimate for this phase of the project is $2,000,000. Funding for this phase of the project will come from the Sanitation Enterprise Fund as part of the 2025/2026 fiscal year budget.

Collaborations (including Board advisory groups and external partner agencies)

The Division has worked with Yolo County General Services Procurement Division to compile the specifications and bid documents for the project.

Competitive Bid Process/Vendor Performance

The project will be advertised on Beacon Bids for competitive bidding. The competitive bid process will be completed in accordance with State Law. Bids will be opened and read publicly at the Department of Community Services-Division of Integrated Waste Management. A contract will be awarded to the lowest responsive and responsible bidder.

Fiscal Impact

Fiscal impact (see budgetary detail below)

Fiscal Impact (Expenditure)

Total cost of recommended action:
$    2,000,000
Amount budgeted for expenditure:
$   
Additional expenditure authority needed:
$   
One-time commitment:
Yes

Source of Funds for this Expenditure

Sanitation Enterprise
$2,000,000

Further explanation as needed:

Sufficient funds have been budgeted in the FY 25-26 Sanitation Enterprise Fund capital improvement project budget. (No general fund impact)

Attachments

Form Review

Inbox Reviewed By Date
Marissa Juhler Marissa Juhler 07/10/2025 04:50 PM
Stephanie Cormier Stephanie Cormier 07/10/2025 05:47 PM
Financial Services mrobertson 07/16/2025 10:37 AM
County Counsel Hope Welton 07/16/2025 10:53 AM
Berenice Espitia Berenice Espitia 07/16/2025 11:19 AM
Form Started By:
Jeff Kieffer
Started On:
06/18/2025 08:31 AM
Final Approval Date:
07/16/2025