Pavement and Drainage Repair

Pavement and Drainage Repair

Caltrans will repair pavement and drainage systems damaged by the movement of the Fawn Lodge Slide on SR-299. The slide has continued to shift downhill toward Grass Valley Creek and has caused a separation of a metal culvert that crosses the highway (which created a depression in the pavement), a hump in the pavement of the highway, and the separation of an overland flexible pipe drain system. If the culvert separation is not repair prior to the next rain season major road failure is expected. The existing 24" diameter culvert will be repaired by inserting a 20" diameter polyethylene pipe inside it and filling the annular space between the two with grout material. Once the new pipe is installed the excavated material will be returned to the ditch. The pavement repair will include digging out the humped and depressed asphalt concrete (AC), removing or adding base to match surrounding levels, and replacing the AC. The overland system is a 1,500' section of flexible 5" diameter pipe with snap together couplings that have separated. This pipe will be removed and replaced by 2" diameter pipe with positive connections.

Trinity