Delta Flood Emergency Facilities Improvement Project Refinements

Delta Flood Emergency Facilities Improvement Project Refinements

Minor refinements to the proposed project have been made since June 2013 and are the focus of this subsequent Initial Study/subsequent proposed MND (IS/MND). Proposed project refinements at the Stockton West Weber site include site clearing, grubbing, and removal of organic material including at least 14 and potentially up to approximately 20 trees during project construction; grading including importing backfill material; constructing 12-inch aggregate base all-weather surfaces above the 100-year flood elevation; improving, extending, or abandoning existing utilities services where required; constructing a new 7,000 square foot steel frame building with concrete foundation for warehouse use; constructing new concrete foundations for two rock conveyors; constructing a 6,500 square foot asphalt foundation/pad for four temporary office trailers and a pre-fabricated restroom facility; construct 4,600 square-foot asphalt of up to 150,000 tons of various rock gradations (an increase from 40,000 tons in original project description); installing an additional two spud piles (for a total of eight spud piles) near the toe of bank along the Stockton Deep Water Ship Channel to support two conveyor support barge structures; and installing up to 11 dolphin pile clusters for mooring of up to three transport barges during rock-loading operations. Proposed project refinements at the Rio Vista site include: site clearing, grubbing, and removal of organic material including approximately 4.0 acres of trees as necessary during project construction; decreasing the acreage for vehicle parking from 1.25 acres to 0.75 acre; providing new water and electrical connections; and widening the existing access road from about 20 feet to 28 feet, including removing at least two and up to approximately 15 trees along the existing access road.

Rio Vista, Stockton

Sacramento, San Joaquin, Solano