Saint Helena Creek Bridge at Hilderbrand Drive Replacement Project

2 Documents in Project


SCH Number
Lead Agency
Lake County
Document Title
Saint Helena Creek Bridge at Hilderbrand Drive Replacement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Bridge/"SR-WW-FF-SC, RR-WW-FF-SC"/Resource Conservation, Suburban Reserve, Rural Residential, Rural Lands.

Document Description
The project consists of the replacement of the existing St. Helena Creek Bridge on Hilderbrand Drive. The existing structure is an 80-foot long steel truss Bailey bridge with timber deck boards on steel floor beams set on concrete abutments. The net width of the Bailey bridge is 13 feet. The proposed permanent replacement bridge is a 100-foot long, 23-foot wide single-span precast pre-stressed concrete girder bridge with reinforced concrete wall abutments that would not require intermediate piers. The superstructure of the bridge will be positioned to allow flood flows to pass without overtopping the new bridge. The two existing piers will be removed. The existing east and west roadway approaches will be raised to meet the new bridge elevation.

Contact Information
Brian Horn
Lake County, Community Development Department
Lead/Public Agency
225 N. Forbes Street
Lakeport, CA 95453

Phone : (707) 263-2221


38°42'16"N 122°36'12"W
Cross Streets
Mirabel Road and State Highway 29
Total Acres
Parcel #
State Highways
Hwy 29
St. Helena, Wilkinson, Hoffman, Bradford, and Grizzly Creeks
Other Location Info
City/Nearest Community: Middletown

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Other (Bridge Replacement)
Local Action
Mitigation Plan
Project Issues
Biological Resources Cultural Resources Flood Plain/Flooding
Reviewing Agencies
California Department of Fish and Wildlife, North Central Region 2 (CDFW) California Department of Parks and Recreation California Department of State Parks, Division of Boating and Waterways California Department of Transportation, District 1 (DOT) California Highway Patrol California Native American Heritage Commission (NAHC) California State Lands Commission (SLC) Central Valley Flood Protection Board Department of Water Resources Resources Agency California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, 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.

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