UPRR Valley Subdivision MP 239.83 Bridge Repair Project (Project)
Summary
SCH Number
2026090996
Public Agency
California Regional Water Quality Control Board, Central Valley Redding Region 5
(RWQCB)
Document Title
UPRR Valley Subdivision MP 239.83 Bridge Repair Project (Project)
Document Type
NOE - Notice of Exemption
Received
Posted
9/23/2026
Document Description
The proposed project will repair pier #6 of the existing bridge at Milepost 239.83 on the Valley Subdivision. An excavator equipped with a vibratory sheet driver will install steel sheet-pile forms a minimum of 6 inches from the perimeter of the existing 8-foot-by-22-foot pier to a minimum depth of 10 feet below the scour line, containing a 9-foot-by-23-foot area. If any standing water remains in depressions adjacent to the pier, a pump will dewater the area contained by the sheet pile, and the contained area will be excavated to create a void. Controlled low-strength material (CLSM) will be pumped into the scour hole in 3-foot-deep layers and allowed to cure before the next layer is poured. CLSM poured between the existing pier and the sheet-pile form will result in 0.0007 acre of new fill. When poured to a depth of 10 feet below the scour line, a volume of approximately 11.5 cubic yards of CLSM will be required.
Additionally, two existing abandoned piers and associated sheet-pile cofferdams from a previous bridge, each approximately 12-feet by 24-feet, will be removed from the Cottonwood Creek channel. The structures will be cut 3 feet below the ground line. One of the two abandoned pier structures is below the ordinary high water mark of Cottonwood Creek, and its removal will result in 0.018 acre and 32 cubic yards of temporary impacts. With the staging and work area for the Project, the combined total of temporary impacts will be 0.097 acre.
Following construction activities, debris will be removed, temporary work and staging areas will be restored to pre-project contours as necessary, and best management practices will be removed.
Contact Information
Name
Lynn Coster
Agency Name
Central Valley Regional Water Quality Control Board
Job Title
Senior Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Name
Stephen Cheney
Agency Name
Union Pacific Railroad Company
Job Title
Senior Director Design & Environmental
Contact Types
Project Applicant
Phone
Email
Name
Samuel Bohannon
Agency Name
U.S. Army Corps of Engineers, Sacramento District
Job Title
Senior Regulatory Project Manager
Contact Types
Lead/Public Agency
Phone
Location
Coordinates
Cities
Cottonwood
Counties
Tehama
Regions
Northern California
Township
29 N
Range
04 W
Section
11
Base
MDB&M
Other Location Info
The Project is located approximately 0.41 mile southwest of the intersection of Main Street and Front Street in Cottonwood.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
California Code of Regulations, title 14, Article 19, section 15301, Existing Facilities
Reasons for Exemption
This project is categorically exempt under CEQA section 15301 because the project involves maintenance activities to repair an existing private structure involving negligible or no expansion of existing or former use.
County Clerk
Tehama
Attachments
Notice of Exemption
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