Diablo Road Trail Project

The Town is preparing for construction of the Diablo Road Trail. As the construction plan is finalized, crews will begin clearing the project area. Beginning Monday, March 3, some trees will be removed along Diablo Road, which may cause traffic disruption along the Diablo Road corridor near the Diablo community, between Fairway Drive and Alameda Diablo (see map). The Diablo Road Trail Project is aimed at enhancing safety and access for pedestrians and cyclists, and tree removal to make way for the trail will impact daily traffic in the area for 1-3 weeks. I’d appreciate it if you could share this information with your community so they can plan for potential disruptions to their commute

Project Details:

• Project Name: Diablo Road Trail Project (C-055)
• Location: Diablo Road between Fairway Drive and Alameda Diablo, Town of Danville (see attached map)
• Start Date & Duration: Work is scheduled to begin Monday, March 3, 2025, and is expected to last 1–3 weeks. We anticipate completion by March 7, 2025, with a firm end date no later than March 20, 2025.
• Work Hours: Monday through Friday, 9:00 AM to 2:00 PM, to reduce interference with school bell schedules.
• Traffic Notification: Lighted message signs will be placed at two locations along Diablo Road starting one week prior to March 3 to alert drivers of the upcoming project and potential traffic changes.
• Traffic Impact: Expect occasional delays or lane adjustments during work hours. Only one lane is expected to be closed when necessary to minimize disruption.

We apologize for any inconvenience and thank you for your patience and cooperation as we work to improve the corridor. Our goal is to keep disruptions to school operations and daily routines as minimal as possible.

The environmental assessment and preliminary design phases of the Diablo Road Trail have been successfully completed. In spring 2023, the Town submitted applications for environmental permits to both state and regional regulatory agencies, including the California Department of Fish & Wildlife (CDFW) and Regional Water Quality Control Board (RWQCB).

Unfortunately, the winter storms of 2023 not only led to the collapse of the Diablo Road culvert but also led to considerable erosion of the creek embankment designated for the trail alignment. In fall 2023, CDFW issued the Town an extensive list of conditions for permit approval. Beyond significantly increasing the project’s scope and corresponding costs, the Town believes that these conditions appear to be disproportionate to the project’s limited environmental impact. Over the next several months the affected areas will be resurveyed, redesigned, and resubmitted to the regulatory agencies with a detailed response.

With 100% of the project funding secured, the Diablo Road Trail is entering its final phase before construction commences. This phase involves an environmental assessment of the trail project, completing the final design, and securing permits from regional and federal regulatory agencies.

Notice of Public Review Period and Intent to Adopt a Mitigated Negative Declaration of Environmental Significance

Diablo Road Trail Initial Study/Mitigated Negative Declaration

Appendix A - Air Quality Data

Appendix B - Biological Resources and Arborist Report

Appendix C - Archaeological Survey Report

Appendix D - Geohazards Study

Currently, an environmental assessment – specific to the project scope – is underway. This part of the effort is expected to conclude in winter 2022. After its completion, the Town would be able to complete final design work and begin the work of securing approvals from regulatory agencies.