UPRR Canyon Subdivision, Milepost 264.53 Bridge Replacement Project

The Union Pacific Railroad Canyon Subdivision Milepost 264.53 Bridge Replacement Project involves the replacement of a failing 111-foot-long, 36-inch-diameter corrugated metal pipe culvert in Plumas County, California. The existing structure has been deemed unsafe due to corrosion, a buckled floor, and a bowing ceiling. The project will install a new 120-foot-long, 60-inch-diameter smooth steel pipe culvert using a horizontal auger boring jack and bore method through the railroad embankment, positioned approximately 6 feet east and parallel to the current culvert. Once the new structure is complete, the old culvert will be grouted and abandoned in place. The project is classified under NAICS code 237310 and is managed by the Union Pacific Railroad Company. It has been granted a categorical exemption under CEQA section 15302 as it maintains substantially the same purpose and capacity on the same site. Key regulatory requirements include a Clean Water Act Section 401 Water Quality Certification from the California Regional Water Quality Control Board, Central Valley Region, Redding Office, and Section 404 authorization from the U.S. Army Corps of Engineers, Sacramento District. The work is located at Section 21, Township 25 North, Range 07 East, MDB&M, with coordinates 40.0070° latitude and -121.1935° longitude.