• Bridge - Annapolis Rd 1

Bridge Projects

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  • Construction of a concrete box culvert, corrugated metal pipe culvert extensions, and a pipe headwall.
  • Construction of earthquake upgrades for portions of the Annapolis Road Bridge over the Wheatfield Fork of the Gualala River.
  • 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.

  • We are currently replacing the one-lane bridge over the South Fork of the Gualala River with a two lane, 29 foot wide and 165 foot long steel bridge. The new bridge will be constructed adjacent to the existing bridge, and will provide two lanes designed to meet current standards, including shoulders and improvements to the approaching roadway. The existing bridge will remain in place through the construction process.

  • Construction of a pile foundation for Korbel Summer Crossing over the Russian River consisting of seven pairs of 24-inch diameter steel pipe piles.
  • 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.
  • Replacement of the existing bridge at Porter Creek with a 62-foot-wide by 160-foot-long single span concrete box girder bridge, along with widening of the approach roadways and construction of a left turn lane at Franz Valley Road.
  • Construction of a 6.0-meter-wide by 46.748-meter-long viaduct with minor revisions to profile and cross slope on the approach and contiguous roadway.
  • This project consists of demolishing an existing bridge and replacing it with a new, wider bridge, as well as approach widening and street improvements. The bridge is located on Riverside Drive at Sonoma Creek, outside the city of Sonoma.
  • Surface improvements to various roads and bridges county-wide.
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La Plaza B
2300 County Center Drive
Suite B 100
Santa Rosa, CA 95403
38.462006, -122.725384

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