2025 Road Sealant

Description

Overview

This project provides pavement preservation maintenance on approximately 25 miles of County-maintained roads by applying an appropriate surface treatment (slurry seal, microsurfacing, cape seal, rubberized crack filler, etc.) depending on the condition of each roadway. The purpose is to use cost effective and time efficient roadway surface treatments to help preserve the lifespan of the pavement, postponing the need for more invasive, time consuming and expensive roadway rehabilitation projects. More information about the County’s Paving Program, including the five-year pavement management plan, can be found online.  

The work will be staggered by location to limit the overall traffic impact and will target sections of road in the unincorporated areas of:

  • Dillon Beach
  • Fairfax
  • Kentfield
  • Marin City
  • Mill Valley
  • Point Reyes
  • Santa Venetia
  • Strawberry
  • Sleep Hollow
  • Tomales
  • Valley Ford
  • Specific roads:
    • Section(s) of Fairfax-Bolinas Road
    • Section(s) of Muir Woods Road

Road segments in unincorporated Mill Valley and Sleepy Hollow will be the first to receive the pavement sealant treatments, and that work is expected to take place between July 23 and early August. Please check back regularly and see the "Timeline" section to find out timing of the work in the other areas listed above.

As part of the overall project, in coordination with the Sonoma-Marin Area Rail Transit (SMART) District, the County will be performing long-awaited improvements to the railroad crossing on Grandview Avenue near Harbor Drive, on the perimeter of the Black Point community, from August 5 through August 8. 

Funding

The estimate for this project is $3.5M and it will be funded by Senate Bill 1 (SB1).

Traffic impacts

Construction will take place during the daytime hours with traffic control measures.  Sealing work is a relatively quick compared to paving work, and typically requires only one day of significant traffic impacts per road segment. Expect traffic control measures and a maximum of five minutes traffic delay during work hours.

Property owners/residents along the roads scheduled for rehabilitation are given advance written notifications ahead of any work that requires their road to be closed in order for them to have adequate time to prepare.

The Grandview Avenue phase of work will occur from August 5 through August 8, with varying traffic impacts, including 5-10 minute delays during daytime hours and a full closure from 9AM on August 6 to 5:30AM on August 7. During the nighttime closure, only active emergency vehicles will be granted access, except for 4AM to 4:15AM when access will be granted for all through traffic.

Timeline

Late July 2025

  • Construction phase begins
  • First areas to receive roadway surface treatments are unincorporated Mill Valley and Sleepy Hollow. Expected schedule is July 23 through early August.

End of 2025

  • Expected end of construction
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