Freestone Flat Road Bridge Replacement Project


SCH Number
Lead Agency
Sonoma County
Document Title
Freestone Flat Road Bridge Replacement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Resources & Rural Development

Document Description
The Sonoma County Department of Transportation and Public Works proposes to replace the existing a two-span, steel-girder truss Freestone Flat Road Bridge over Salmon Creek. The existing bridge would be replaced with a two-lane, cast-in-place prestressed concrete box-girder bridge supported on cast-in-drilled-hole piles at the abutments. The new bridge would be located parallel to and southeast of the existing bridge. The existing bridge would remain in service until the new bridge is complete, then disassembled and removed from the site. Building the bridge on a new alignment requires the construction of new approaches on the east and west sides of the replacement bridge. Existing intersecting roads, including Scott Robin Road and a private driveway, would be modified to meet the new location of Freestone Flat Road as it approaches the bridge.

Contact Information
John Leong
Sonoma County Department of Transportation and Public Works
Lead/Public Agency
2300 County Center Drive, Suite 8-100
Santa Rosa, CA 95403

Phone : (707) 565-2231

Sonoma County Department of Transportation and Public Works
Project Applicant


38°22'44.8"N 122°55'23.1"W
Cross Streets
Scott Robin Road
Total Acres
State Highways
Bohemian Highway
Salmon Creek Middle School
Salmon Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation (Bridge Replacement and Road Realignment)
Local Action
Bridge Replacement
Project Issues
Aesthetics Agriculture and Forestry Resources Air Quality Biological Resources Cultural Resources Cumulative Effects Drainage/Absorption Flood Plain/Flooding Geology/Soils Growth Inducement Hazards & Hazardous Materials Hydrology/Water Quality Land Use/Planning Mineral Resources Noise Population/Housing Public Services Recreation Schools/Universities Solid Waste Transportation Tribal Cultural Resources Vegetation Wetland/Riparian Wildfire
Reviewing Agencies
California Air Resources Board (ARB) California Department of Forestry and Fire Protection (CAL FIRE) California Department of Parks and Recreation California Department of Transportation, District 4 (DOT) California Department of Water Resources (DWR) California Highway Patrol (CHP) California Native American Heritage Commission (NAHC) California Natural Resources Agency California Regional Water Quality Control Board, North Coast Region 1 (RWQCB) California State Lands Commission (SLC) Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Water Quality California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)


Environmental Document
Freestone Flat Road Bridge_ISMND   PDF 6963 K Freestone Flat Road Bridge_ISMND_Appendices   PDF 2098 K NOI   PDF 913 K Summary Form   PDF 962 K
NOC   PDF 1591 K
State Comments
2020089008_CDFW Comment   PDF 445 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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