Napa County Storm Repair Project - Knoxville Berryessa Site (Lake or Streambed Alteration Agreement No. 1600-2019-0276-R3)

Summary

SCH Number
2019120170
Lead Agency
Fish and Wildlife, Region 3 - Bay Delta, Fairfield (California Department of Fish and Wildlife, Bay Delta Region 3)
Document Title
Napa County Storm Repair Project - Knoxville Berryessa Site (Lake or Streambed Alteration Agreement No. 1600-2019-0276-R3)
Document Type
NOE - Notice of Exemption
Received
Posted
12/6/2019
Project Applicant
Napa County Department of Public Works

Document Description
The California Department of Fish and Wildlife has executed Lake and Streambed Alteration Agreement number 1600-2019-0276-R3, pursuant to Section 1602 of the Fish and Game Code to Napa County Department of Public Works. The project will remove four 54-inch diameter corrugated steel pipes, which serve as a culverted bridge crossing that was damaged during the 2017 winter storms. It will be replaced with an approximately 25-foot long 29-foot wide free-span reinforced concrete bridge. The bridge will be supported on two approximately 12 feet tall, 5-feet wide concrete abutments and associated concrete footings. Four retaining walls, approximately 14 feet long, 6.5 feet tall, and 1-foot wide will be installed and extend out from the concrete abutments along the banks to provide bank stability. Approximately 14 cubic yards of ¼ ton rock riprap will be keyed in at the toe and extend up to the top of bank at approximately a 1 :1 slope to prevent undermining of concrete abutments and retaining walls. A layer of filter fabric will be installed on the banks prior to rock placement, and the bottom of the bridge will be approximately 1- foot above the 100-year water surface elevation.

Contact Information
Garrett Allen
Department of Fish and Wildlife Bay Delta Region
2825 Cordelia Road, Suite 100
Fairfield, CA 95434

Phone : (707) 428-2076

Location

Coordinates
38°25'28.2"N 122°9'14"W
Counties
Napa
Other Location Info
The project is located within the Knoxville Wildlife Area (owned by CDFW) where Knoxville Berryessa Road passes over an unnamed tributary to Eticuera Creek, thence Lake Berryessa, in rural north Napa County, State of California.

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 includes the replacement of a culverted bridge crossing with a free-span bridge that will be relatively the same size as the existing structure and serve the same purpose.
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