10-1V020-E. Fork Chowchilla River Damage

The East Fork Chowchilla River Damage project, identified as EA 10-1V020, consists of emergency repairs beneath Bridge No. 400048 on State Route 49 at Post Mile 3.0 in Mariposa County. Managed by Caltrans District 10 in Stockton, the project addresses slope erosion and washout onto Kemble Road caused by a collapsed pipe and damaged dike. The primary objective is to stabilize the eroded slope to prevent further damage and avoid the loss or impairment of life, property, or essential public services. All work will be performed within the Caltrans Right of Way. The scope of work includes removing loose unsuitable material from damaged embankments, backfilling with suitable material, and placing cement slurry in voids. Additionally, the contractor will replace the damaged drainage pipe and asphalt concrete dikes near the drainage inlet box, and install permanent erosion control on disturbed soil. The project is categorized as a forecast under NAICS code 237310 and has been determined to be exempt under CEQA statutes and categorically excluded under NEPA regulations. Special requirements include strict protocols for the discovery of cultural resources or human remains, requiring immediate work stoppage and notification of the Engineer or County Coroner.