108 Brookside, Angwin - Culvert and Storm Damage Repair Project (Lake or Stream bed Alteration Agreement No. 1600-2018-0328-R3)


SCH Number
Public Agency
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Document Title
108 Brookside, Angwin - Culvert and Storm Damage Repair Project (Lake or Stream bed Alteration Agreement No. 1600-2018-0328-R3)
Document Type
NOE - Notice of Exemption
Document Description
The California Department of Fish and Wildlife has executed Lake and Streambed Alteration Agreement number 1600-2018-0328-R3, pursuant to Section 1602 of the Fish and Game Code to County of Napa Public Works Department. The project is to slip line an approximately 108-inch diameter, 45.8 linear-foot long corrugated metal pipe (CMP) with an approximately 96-inch diameter, 50.9 linear-foot long high-density polyethylene pipe and filling the annular space with grout. Additionally, the project will install an approximately 46.1-foot long and an approximately 39.9-foot long, reinforced concrete pipe (RCP), both 42-inch diameter RCP's above the existing 108-inch diameter CMP, via open trench method, to provide adequate capacity to convey storm flow during the 100-year event. Additionally, two rock weirs will be constructed in the stream channel approximately 27 and 39 feet downstream of the culvert outlet to provide grade control to improve fish passage and to provide aquatic habitat. Lastly, the project will trim one approximately 16-inch diameter at breast height (dbh) redwood tree and remove two bay trees, one that is 10 inches dbh and another that is 42 inches dbh.

Contact Information

Garrett Allen
Agency Name
Department of Fish and Wildlife Bay Delta Region
Contact Types
Lead/Public Agency

Agency Name
County of Napa Department of Public Works
Contact Types
Project Applicant


Other Location Info
The project is located where Conn Creek flows under Brookside Drive at 108 Brookside Drive, Angwin, Napa County.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Type - Class 2; California Code of Regulations, title 14, section 15302
Reasons for Exemption
The project is exempt from CEQA because it includes the replacement/reconstruction of a failed culvert where the new culvert is in the same location and will fulfill the same purpose as the existing failed culvert.


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