Tomki Road Prototype Vented Low Water Crossing / Sediment Reduction & Habitat Improvement Project

4 Documents in Project


SCH Number
Lead Agency
Mendocino County
Document Title
Tomki Road Prototype Vented Low Water Crossing / Sediment Reduction & Habitat Improvement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
RL 160 Range Lands, 160 acre minimum

Document Description
MCDOT proposes construction of one prototype vented, low water crossing at the most southerly crossing for the following reasons: (1) likely road realignment options are on the easterly side of Cave Creek, thus the first crossing is likely needed. (2) Should the prototype prove successful it could be proposed as a long-term solution to improve water quality for the existing crossings on the present road alignment, 3) it is likely to be needed whether or not the road is realigned in the future. The proposed prototype vented low water crossing will replace the water ford at MP 6.17 with a 20' wide x 4' high x 60' long pre-manufactured bottomless concrete arch structure designed to allow anadromous fish passage at all life stages and pass stream bed material using natural streambed geomorphology. The proposed structure will also be designed to accommodate the 10-year, or 10% probability storm event without overtopping, and pass the 100-year storm event, 1% probability of occurrence, without structural damage.

Contact Information
Alex Straessle
Mendocino County Department of Transportation
340 Lake Mendocino Drive
Ukiah, CA 95482

Phone : (707) 467-2542


Cross Streets
Hearst Willits Road
Total Acres
Parcel #
Cave Creek, Little Cave Creek, Dead Horse Canyon Creek, Russian River
Other Location Info
City/Nearest Community: Redwood Valley

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (vented low water crossing)
Local Action
Other Action Other Action: Stream Crossing
Project Issues
Biological Resources Public Services Soil Erosion/Compaction/Grading Water Quality Wetland/Riparian Other Other Issues: Fisheries Habitat
Reviewing Agencies
California Department of Fish and Wildlife, Eureka Region 1 California Department of Parks and Recreation California Department of Transportation, District 1 California Highway Patrol California Native American Heritage Commission California Regional Water Quality Control Board, North Coast Region 1 Department of Toxic Substances Control Department of Water Resources Resources Agency

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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