California Department of Transportation, District 5
Prunedale Drainage Improvements
MND - Mitigated Negative Declaration
Present Land Use
The California Department of Transportation (Caltrans) proposes multiple drainage improvements within a 1.5-mile-long section of U.S. Route 101 in Monterey County from just north of the Crazy Horse Canyon Road/Echo Valley Road overcrossing (at post mile 98.8) to the northernmost intersection with Dunbarton Road (at post mile 100.3). Improvements would be implemented through joint repair and/or a complete replacement, depending on the conditions at each location. Existing culverts would be replaced with reinforced concrete pipes. Most of the replaced culverts would be upgraded to larger diameter drainage pipes for increased discharge capacity and reduced water flow velocity. Culvert replacements would use either the cut and cover method or the trenchless pipe jacking method. Existing drainage inlets would be replaced with new drainage inlets that meet current design standards. New flared end sections would be installed on the inlets and outlets of culverts as needed to prevent erosion. Concrete headwalls would be removed and replaced as needed. Damaged shoulder embankment slopes would be repaired at the outlets of two culverts. Two drainage channels would be graded to remove excess silt and vegetation.
California Department of Transportation D5 Environmental Analysis
US 101 & Dunbarton Rd; US 101 & Crazyhorse Canyon Rd/Echo Valley Rd
US 101 & SR 156
Other Location Info
15 drainage system locations along US Route 101 from just north of the Crazy Horse Canyon Road/Echho Valley Road overcrossing (at post mile 98.8) to the northernmost intersection with Dunbarton Rd (at post mile 100.3).
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Fish and Wildlife, Central Region 4 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Transportation, District 5 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Central Coast Region 3 (RWQCB), California Transportation Commission (CATC), Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water
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