To: BOARD OF SUPERVISORS
From: Supervisor Cline, Supervisor Williams, and Department of Transportation
Meeting Date: April 8, 2025
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Department Contact: |
Howard Dashiell |
Phone: |
707-463-4363 |
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Department Contact: |
Supervisor Cline |
Phone: |
707-463-4441 |
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Department Contact: |
Supervisor Williams |
Phone: |
707-463-4441 |
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Item Type: Regular Agenda |
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Time Allocated for Item: 30 Minutes |
Agenda Title:
title
Discussion and Possible Action Including Direction to Department of Transportation and Staff to Develop Options for an Additional Effort in 2025-26 to Treat Segments of Surfacing for Various Portions of the County Maintained Road System
(Sponsors: Supervisor Cline, Supervisor Williams, and Department of Transportation)
End
Recommended Action/Motion:
recommendation
Direct Department of Transportation and staff to develop options for an additional effort in 2025-26 to treat segments of surfacing for various portions of the County Maintained Road System.
End
Previous Board/Board Committee Actions:
None.
Summary of Request:
During the January 15, 2025 Board Workshop, the Mendocino County Department of Transportation (MCDoT) agreed to present various options for the same type of Pavement Preservation as MCDoT’s annual Corrective/Preventative Maintenance projects which are funded through Senate Bill 1 (SB 1): The Road Repair and Accountability Act and Road Maintenance and Rehabilitation Account (RMRA) - e.g. the “Twenty Year Plan”. This 2025-26 option would be in addition to the “Twenty Year Plan” annual project, funded by County General Fund (GF), with the amount of funding to be determined.
Treatment options depend on the Pavement Condition Index (PCI) of the road segment. MCDoT has not selected roads and is seeking direction from the Board of Supervisors (BOS). During the workshop, discussions included options such as treating roads segments in all Supervisor Districts, adding to the “Twenty Year Plan”, or completing the next year of the “Twenty Year Plan” early in order to reduce the delivery time.
To aid in the discussion, the following “ballpark” estimates are presented for different scenarios:
Scenario #1: Road with a 10% base failure (needing dig outs) and 20% needing Full Depth Reclamation (Cement), sometimes called “in place recycle” or “pulverize roadbed, shape/grade, compact,” with 80% double chip seal top wear course only: $337,000 per mile.
Scenario #2: Road with a 10% base failure (needing dig outs) and 40% needing Full Depth Reclamation (Cement), sometimes called “in place recycle” or “pulverize roadbed, shape/grade, compact,” with 50% double chip seal top wear course only: $417,000 per mile.
Scenario #3: Road with a 20% base failure (needing dig outs) and 80% needing Full Depth Reclamation (Cement), sometimes called “in place recycle” or “pulverize roadbed, shape/grade, compact,” with 20% double chip seal top wear course only: $497,000 per mile.
Scenario #4: Road with 100% needing Full Depth Reclamation (Cement), sometimes called “in place recycle” or “pulverize roadbed, shape/grade, compact” with 20% double chip seal top wear course only: $650,000 per mile
Scenario #5: Road with 100% needing a Thick Overlay (Asphalt Concrete): $803,000 per mile ($152/ft.)
Option #1: Assume Scenario #2 - typical “large segment” average condition road adds GF to large 2025-26 Corrective/Preventative Maintenance (RMRA) project to complete work concurrently at economy of scale, $1 million treats an additional 2.7 miles (5.3 miles treats $2 million, etc.).
Option #2: Complete separate location project(s), include mark-up from concurrent RMRA project for loss of economy scale:
Scenario #1: $1 million treats 2 miles ($2 million treats 4 miles, etc.)
Scenario #2: $1 million treats 1.6 miles ($2 million treats 3.2 miles, etc.)
Scenario #3: $1 million treats 1.3 miles ($2 million treats 2.6 miles, etc.)
Scenario #4: $1 million treats 1.02 miles ($2 million treats 2.04 miles, etc.)
Scenario #5: $1 million treats 0.83 miles ($2 million treats 1.7 miles, etc.)
Option #3: Complete a small project that is less than AB 720 Limit projects with County Crews (potentially hiring summer help college students). This is basically what County crews do for their small corrective maintenance projects; they use local source AC with no special contractor equipment and fix the really bad spots with hot mix AC.
Scenario #5: Complete small patches, 500 feet at a time: $1 million treats 1.8 miles ($2 million treats 3.6 miles, etc.). Adjusting past expenditures to 2025 dollars and averaging over the last ten years, MCDoT has spent approximately $150,000/year on winter cold patches and $400,000/year on summer hot mix short (500-foot) patches of thick overlays on the worst road segments. Option #3, at $1 million, would allow for about 2.5 times the typical summer overlay coverage, while $2 million would provide roughly 5 times more.
Alternative Action/Motion:
Direct staff on an alternate process.
Strategic Plan Priority Designation: A Prepared and Resilient County
Supervisorial District: All
Vote Requirement: Majority
Supplemental Information Available Online At: N/A
Fiscal Details:
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source of funding: General Fund |
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current f/y cost: to be determined |
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budget clarification: N/A |
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annual recurring cost: N/A |
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budgeted in current f/y (if no, please describe): N/A |
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revenue agreement: N/A |
AGREEMENT/RESOLUTION/ORDINANCE APPROVED BY COUNTY COUNSEL: Yes
CEO Liaison: Steve Dunnicliff, Deputy CEO
CEO Review: Yes
CEO Comments:
FOR COB USE ONLY
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Executed By: Atlas Pearson, Senior Deputy Clerk |
Final Status: Direction Given to Staff |
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Date: April 9, 2025 |
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