Pocket Canyon Slip Out Repair DO (EA 3X570)

The Pocket Canyon Slip Out Repair project, identified as solicitation 3X570, is a Caltrans District 4 initiative aimed at repairing roadway embankment instability on eastbound SR-116 in Sonoma County at post mile 15.40. The project was necessitated by a large storm event that caused soil erosion, displacement, and roadway collapse, compounded by a tree stump undermining the slope toe. The technical scope of work includes the installation of a 35-foot-long interlocking sheet pile wall, positioned nine feet outside the fog line, with a total height of approximately 35 feet. To stabilize the area, the space behind the wall will be backfilled with cellular concrete, followed by the placement of imported borrow compacted to a minimum of 90% relative compaction. Additional construction requirements include the installation of cable railing for pedestrian safety and the implementation of necessary traffic control measures. Environmental compliance is a key component of this project, which has been classified as categorically exempt under PRC 21084 and 14 CCR 15301 Class 1(d) due to no anticipated environmental impacts. A biological monitor is required to be present for the duration of all construction activities to ensure adherence to environmental standards. While the project documentation provides a detailed technical statement of work and identifies the Caltrans District 4 Office of Maintenance Environmental as the procuring office, specific financial details such as the estimated contract value, pricing schedules, and contract type are not provided in the current forecast. The project is managed by Senior Environmental Scientist Juliane Smith.