RD25-21 Piru Canyon Road Drainage Improvements at Milepost 0.58

Project Description: Removal of an existing 42-inch CMP and headwall and constructing a 10-foot wide x 5-foot high single box culvert, reinforced concrete channel, an 84-inch CMP downdrain and related drainage improvements. The work includes Mobilization, Water Pollution Control, Traffic Control & Construction Signing, Temporary Fencing, Removal of Existing Facilities, Clearing & Grubbing, Sawcutting, Excavation Safety, Unclassified Excavation, 3/4” Crushed Rock Bedding, Structural Backfill, Unclassified Fill, Debris Fence, Structural Concrete(RC Channel), Bar Reinforcing Steel(RC Channel), Headwall, RC Box, Junction Box, Manhole, 84-inch CMP, 84-inch Concrete Collar, 84-inch Flared End Section, Class VIII Riprap, AC Pavement, Guardrail, Guardrail End Treatments, Cable Railing, Wire Fence, Pipe Gate, Processed Miscellaneous Base, Pavement Delineation, Striping and Signage, and appurtenant work.