Repair storm damage to the Hearst San Simeon SHM approach road including replacement of existing culverts and reconstruction of sections of the roadway to allow resumption of bus transportation of visitors. Work will:
- Remove approximately 150 large diameter trees and replace with native saplings and grub vegetation along the culvert corridors.
- Excavate approximately 1,500 cubic yards of asphalt, road base, and soil along 7 sections of road failure and along 26 existing culvert locations.
- Remove approximately 4,600 linear feet of existing, non-functioning corrugated metal pipe (CMP) and clay pipe.
- Abandon in place approximately 1,350 linear feet of underground CMP or clay pipe and fill with a slurry mix or sand.
- Install approximately 6,200 linear feet of new high density polyethylene pipe (HDPE) and CMP and secure with anchor rods or direct-bury in excavated sections.
- Install rock slope protection (RSP) aprons each 50 square feet at the end of each drain.
- Construct a 14-foot deep, 10-foot wide and 100-foot long gabion rock retaining wall below ground.
- Reconstruct 7 sections of road failure, recompact soils, install road base, and repave asphalt.
- Reconstruct sections of historic retaining wall where new pipes pass through the wall.
- Install a new 85-foot long, 24-inch diameter culvert.
- Install approximately 27 new drain inlets and 3 new trash racks.
All project work will comply with California Public Resources Code, the California Fish and Game Code, the Endangered Species Act, the Migratory Bird Treaty Act, and the Secretary of Interior standards for the preservation and treatment of historic resources.