China Gulch Emergency Culvert Replacement

The China Gulch Emergency Culvert Replacement project is an emergency effort by Caltrans District 1 in Eureka to repair critical roadway damage at the intersection of State Route 1 and Old Stage Road in Gualala, Mendocino County. Following heavy winter rains in early 2025, a failed separated culvert caused a large sinkhole at post mile 0.6 on State Route 1. While temporary repairs were initially implemented, ongoing movement and a high risk of sudden road collapse necessitated immediate action to protect public health, safety, and essential services. The project is classified under NAICS code 237310 and is currently listed as a forecast with a posted date of June 12, 2026. A Notice of Exemption was filed on June 11, 2026, identifying the California Department of Transportation as the lead agency and project applicant. The scope of work focuses on replacing the failed culvert and stabilizing the roadway to prevent further impairment of life and property. Laurel Osborn, an Environmental Scientist, serves as the primary point of contact for the project.