Hollister Road Bridge Replacement Project, Agreement 2009-0040-R4

Hollister Road Bridge Replacement Project, Agreement 2009-0040-R4

The CDFG is executing a Lake and Streambed Alteration Agreement pursuant to Section 1602 of the Fish and Game Code to the Project applicant, Mr. Edralin Maduli. The proposed Project would remove an existing bridge and build a new bridge in its place. The existing bridge is 44 ft wide and would be replaced by a new 2 lane bridge 54 ft wide. The site would be dewatered using coffer dams and pipes to convey flow through the site. To accommodate the new bridge, the stream would be excavated to a depth of ~7 ft below the stream bed elevation to remove 25 supporting pilings and portions of both banks would be excavated to accommodate rock slope protection (RSP). Equipment would access the site from one bank, traveling through an area where RSP would be installed later. The RSP would extend for a distance of ~75 ft upstream and downstream from the bridge centerline. The RSP would also extend across the stream channel near the upstream Project limits at sufficient depth to allow accumulation of native materials over the RSP. The stream bed would be reconfigured to mimic existing pools and riffles, thereby avoiding changes in stream hydrology, and 2 log habitat structures would be installed among the RSP. Concrete abutments would be placed outside the top of bank and temporary falsework would be placed in the stream channel. The new concrete bridge would be poured in place, after which the falsework and the dewatering dams and pipes would be removed from the stream channel. Potentially hazardous materials such as lead paint, creosoe laden timbersm and other materials would be removed and disposed of at a facility licensed to accommodate such materials. The site would be stabilized and revegetated using native plant species.

San Luis Obispo