Construct Rock Buttress for Slope Failure Repair along Tompkins Hill Road
Summary
- SCH Number
- 2010128059
- Lead Agency
- Regional Water Quality Control Board, Region 1 (North Coast), Santa Rosa
- Document Title
- Construct Rock Buttress for Slope Failure Repair along Tompkins Hill Road
- Document Type
- NOE - Notice of Exemption
- Received
- Posted
- 12/9/2010
- Document Description
- Winter storms of 2005-2006 caused a slide above Tompkins Hill Road at Post Mile 0.33. The slide pushed dirt, trees and debris onto the road. Emergency repair work consisted of cutting downed trees and clearing debris from the roadway. The project involves excavation of the slide area to accommodate installation of a rock slope buttress will be approximately 15 feet tall and extend approximately 100 feet along the roadway. Excavated material will be stockpiled in the roadway. Some of the excavated material will be used as structural backfill and any excess material will be hauled offsite to an appropriate upland disposal site. A roadside drainage channel along the east side of the road collects storm water runoff and seepage from the adjacent hillside. The drainage channel contains seasonal wetlands that will be temporarily impacted during the proposed project. The drainage channel has been disturbed repeatedly since the 2005-2006 storm events due to the frequent maintenance that has been conducted to remove slide material that sloughs off the hillside and blocks the drainage channel and northbound lane of the roadway. The drainage channel will be restored to its existing form following construction of the rock buttress and the channel will experience less frequent disturbance after the hillside is stabilized.
- Contact Information
-
Dean Prat
Regional Water Quality Control Board, Region 1 (North Coast), Sa
5550 Skylane Boulevard
Santa Rosa, CA 95403
Phone : (707) 576-2801
Location
- Counties
- Humboldt
- Other Location Info
- near Beatrice
Notice of Exemption
- Exempt Status
- Categorical Exemption
- Type, Section or Code
- 15304
- Reasons for Exemption
- The project consists of minor alterations in the condition of land which does not involve removal of scenic trees.
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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.