Siskiyou SR 96 Repairs

Siskiyou SR 96 Repairs

Caltrans in coordination with the Federal Highway Administration (FHWA) is proposing to repair various areas of failure along State Route 96 in Siskiyou County between Yreka and Somes Bar caused by localized flooding in the winter of 2006. These locations received Emergency Opening Services. One location at Post Mile (PM) 15.34 will require foundation drilling for soil samples to help determine course of construction. The project includes one location that will need foundation drilling and soil testing. The embankment slope around the existing culvert outlet was eroded to the extent that the pavement was undermined. There is a 6m drop-off at the edge of traveled way at this location. A reinforced concrete slab will be constructed to span the void. If the geotechnical investigation determines that piles are required to stabilize the concrete slab, they will be constructed vertically under the existing roadway. Because of the drop-off, a concrete barrier will be constructed along the outside of the concrete slab at the edge of shoulder. The testing proposes vertical soil boring for collection of soil and rock samples for analysis. A track mounted mud rotary rig with a water truck will be used in the drilling of the two 50 feet deep by 4.5 inch wide boreholes. Drilling will take place at PM 15.34 in the west bound lane. Drilling will take place from May 22 to May 24 approximately 8 am to 6pm. Soil cuttings will be contained and placed in 55 gallon drums and taken to Orleans maintenance while chemical analysis is on done to determine which landfill they will go to for disposal. Caltrans performed an environmental evaluation for this action, which consisted of a review of resource records and database, consultation with applicable agencies and individuals, and field surveys. No historic properties will be affected. No sensitive species will be affected. Based on the environmental evaluation. It has been determined that there is no potential for the action to result in a significant effect upon the environment.

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