Emergency Debris Barrier Installation at Post-Mile 1.28 State Route (SR)-27 (Stream bed Alteration Agreement No. 1600-2018-0267-R5)

Summary

SCH Number
2019028336
Lead Agency
Fish & Wildlife 5 (San Diego) (California Department of Fish and Wildlife, Region 5)
Document Title
Emergency Debris Barrier Installation at Post-Mile 1.28 State Route (SR)-27 (Stream bed Alteration Agreement No. 1600-2018-0267-R5)
Document Type
NOE - Notice of Exemption
Received
Posted
2/15/2019

Document Description
The California Department of Fish and Wildlife (CDFW) has executed Streambed Alteration Agreement number 1600-2018-0267-R5, pursuant to Section 1602 of the Fish and Game Code, to California Department of Transportation (Caltrans). The project is limited to installation and maintenance of a temporary debris barrier at the confluence of an unnamed tributary to Topanga Creek with SR-27. The debris barrier will be approximately 15-feet-high and 30-feetwide on a slope of 2H:1V to near vertical where the adjacent hill is eroded. The mesh net will be installed via a man lift and attached to the anchors drilled into the hill. The barrier is designed to allow.the flow of water and smaller debris to pass through a large mesh net made of coiled braided cable while catching large debris and preventing it from entering the traveled way of SR-27. Large debris will pose a risk to drivers on SR-27 if the debris flows unimpeded. The barrier will be anchored to the ground by specially designed soil anchors.

Contact Information
Matthew Chirdon
CDFW, South Coast Region
3883 Ruffin Rd.,
San Diego, CA 92123

Phone : (805) 640-1165

Location

Coordinates
34.05506°'"N -118.58152°'"W
Counties
Los Angeles
Waterways
Garapito Creek, Topanga Canyon Creek

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Class 1 - S: 15301(c)
Reasons for Exemption
Class 1 (c) categorical exemption applies to the project because it consists of the minor alteration and maintenance of existing public facility (maintained debris basin and drainage inlet associated with highway) involving no expansion of use.
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