Coal Creek Tributary Stream Crossing Upgrade
Summary
SCH Number
2023050535
Public Agency
California Department of Fish and Wildlife, Northern and Eureka Region 1
(CDFW)
Document Title
Coal Creek Tributary Stream Crossing Upgrade
Document Type
NOE - Notice of Exemption
Received
Posted
5/22/2023
Document Description
The scope of construction activities authorized by this Agreement (Project) is limited to the replacement and improvement of an existing stream crossing damaged in the 2021 Salt Creek Fire that provides access to PG&E electric transmission line facilities. The existing crossing consists of two defunct culverts (24 and 18-inch) at an unnamed intermittent spring-fed tributary to Coal Creek. The stream is not finfish-bearing, but demonstrates Class II habitat values for amphibians and mollusks. The culverts will be replaced with a rock-armored vented ford designed by an engineer to overtop during >two-year flood events and to withstand 100-year stormflows without diverting the stream. An 18-inch culvert will be installed to pass baseflows. The culvert inlet will be armored with six-inch rock slope protection (RSP) and the outlet will be armored with 12-18-inch RSP.
The project also includes the installation of bioengineered bank stabilization upstream of the inlet to support culvert functionality, reduce erosion and sedimentation, and improve aquatic habitat. To improve bank stabilization, large woody debris (LWD) consisting of root wads will be buried in the bank and incorporated into the RSP at the culvert inlet.
Project work will take approximately 15 days to complete and will include a crew of three-six individuals, two-three crew trucks, one excavator, one dozer, one dump truck, one water truck, a backhoe, and miscellaneous hand tools. All work will be conducted during the dry season, however, dewatering via a clear water diversion will be implemented if the spring-fed flows or standing water are present at the Project site.
Contact Information
Name
Helen Bowman
Agency Name
California Department of Fish and Wildlife
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Location
Coordinates
Counties
Shasta
Regions
Northern California
Zip
96051
Parcel #
135-45-048D-3
State Highways
I-5
Waterways
Coal Creek
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 2: title 14, section 15302; Class 4; California Code of Regulations, title 14, section 15304
Reasons for Exemption
The Project will replace an existing, defunct culverted stream crossing with a culverted vented ford crossing of substantially the same purpose and capacity. Minor alterations in the condition of land and water for the purposes of bank stabilization and habitat enhancement, not involving the removal of trees, will also occur.
Attachments
Notice of Exemption
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