Bolinas Avenue Storm Drain Improvements (Phase 2)

Initial Study/Mitigated Negative Declaration

Project Overview
The Town of Ross (Town) has proposed improvements to the existing public storm drain system
to alleviate flooding issues at the Bolinas Avenue and Richmond Road intersection (Project or
proposed Project).

The existing storm drain system carries stormwater runoff from the Richmond Road and Bolinas
Avenue intersection to the outfall under the Winship Avenue Bridge at San Anselmo Creek. The
Town intends to increase stormwater accommodation by adding approximately 630 feet of a new
42-inch-diameter, High Density Polyethylene (HDPE) double wall (Type S) pipe from Bolinas
Avenue to a new outfall on San Anselmo Creek immediately downstream of the Sir Francis Drake
Boulevard Bridge. The new creek outfall would have a rock rip-rap apron. Sidewalks and other
affected structures (existing bus stop, benches, and curbs) would be removed and rebuilt or
replaced by the Project.