TPW Roads

Projects in Planning

Projects planned for the future by Sonoma County Department of Transportation & Public Works.

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  • The existing bridge that carries Chalk Hill Road over Maacama Creek is a one-lane structure built in 1915. It is a County landmark and is eligible for inclusion on the National Register of Historic Places. The existing bridge has deteriorated significantly and is vulnerable to earthquakes as well as foundation scour and erosion along the south creekbank. The bridge has been determined to be unstable in an earthquake, and is threatened by erosion. The County seeks to replace the bridge with a new two-lane bridge. 

  • The Sonoma County Department of Transportation and Public Works (DTPW) proposes to replace the existing Freestone Flat Road Bridge, which is a two-span, steel-girder truss bridge over Salmon Creek, in the southwest portion of the County.

  • Sonoma County is currently working towards replacing the single-lane bridge over Austin Creek, on King Ridge Road. The bridge requires replacement due to scour deficiencies and seismic deficiencies.

  • The County is actively working to engage the community regarding a new bridge that reflects local preferences, meets modern constructions standards, and protects the natural beauty of the region.
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8:00 AM – 2:00 PM

Lobby Hours temporarily reduced as of 8/30/21 until further notice

Contact us by Phone
Office Location
La Plaza B
2300 County Center Drive
Suite B 100
Santa Rosa, CA 95403
38.462023, -122.725381

Standard Plans

Construction Standards for County Roads

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Standard plans for construction of roads and related structures.