Humboldt Co. DPW - Lower Cappell Road, P.M. 2.5, Culvert Restoration Project

Summary

SCH Number
2008098276
Lead Agency
Regional Water Quality Control Board, Region 1 (North Coast), Santa Rosa
Document Title
Humboldt Co. DPW - Lower Cappell Road, P.M. 2.5, Culvert Restoration Project
Document Type
NOE - Notice of Exemption
Received
Posted
9/24/2008

Document Description
Heavy rains in late 2005 and early 2006 caused the 24-inch diameter and 40-foot long culvert Chqui Creek to plug with debris and the creek overtopped its banks. The high flows were diverted over Lower Cappell Road and caused erosion along the road shoulder and around the culvert outlet. The project involved excavating the roadway, removing surface. Excess loose material around the culvert inlet area will be removed, and scoured areas around the culvert outlet and along the embankment will be restored. Culvert excavation and replacement activities will temporarily impact 600 square feet and 60 linear feet of ephemeral stream channel including 400 square feet and 40 linear feet if channel that is already filled by the existing 24-inch diameter culvert and fill. Rock slope protection at the culvert outlet will permanently impact 36 square feet of stream channel and 12 linear feet stream bank. The proposed 36-inch diameter and 4-foot long culvert will be placed in the same location as the existing culvert and will not result in any additional permanent impacts to the stream channel.

Contact Information
Dean Part
Regional Water Quality Control Board, Region 1 (North Coast), Sa
5550 Skylane Boulevard, Suite A
Santa Rosa, CA 95403

Phone : (707) 576-2801

Location

Counties
Humboldt

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
section 15301
Reasons for Exemption
The project involves replacing and existing culvert in the same location involving negligible or no expansion use.
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