Caltrans, Highway 254 - Redcrest Rock and Drainage Project

Caltrans, Highway 254 - Redcrest Rock and Drainage Project

The proposed project includes roadway and drainage restoration at two locations, Post Miles (PM) 22.3 and PM 40.06 located in Humboldt County, on Highway 254. At PM 22.3 the proposed project is necessary because the drainage system and the roadway have failed. The existing cross culvert is plugged with rock and is separated, due to localized earth movement. A new cross-culvert will be placed on a new alignment and the area of the former feeder culvert and junction box will be graded to drain to the new drainage system. At PM 40.06 the proposed project would permanently restore an existing 36-inch diameter culvert. The drainage system and roadway have failed at this location: the roadway embankment slipped and separated the CMP downdrain. The purpose of the proposed project is to stabilize and reconstruct the roadway embankment and restore the drainage system. Caltrans has determined that total project permanent impacts to ephemeral drainages will be approximately 0.0262 acres (329.5 linear feet). The temporary project impacts to ephemeral drainages indentified as waters of the U.S. and State will be approximately 0.026 acres (248 linear feet). In addition, Caltrans has determined that temporary impacts to riparian areas (waters of the State) will total 0.23 acres (10,140 feet^2, 295 linear feet) Caltrans proposes revegetation and additional trees and shrubs will be planted at onsite locations to offset impacts to riparian habitats, improve water quality by shading and cooling waters, and enhance habitat for aquatic species. Caltrans proposed to revegetate 0.32 acres (14,100 feet^2, 440 linear feet) of riparian habitat. Additionally, the drainage work planned should befit water quality by reducing area with excessive erosion. Work within waters of the U.S will only be conducted in the dry season (May 15 to October 15).

Humboldt