Mt. Diablo Road and Trial Management Plan

The California Department of Parks and Recreation is implementing the Mt. Diablo Road and Trial Management Plan to repair eight drainage culverts at Mount Diablo State Park. The scope of work involves utilizing heavy equipment to backfill native soil for re-bedding existing culverts, restoring road access, and stabilizing streambanks. To mitigate erosion, six of the sites will receive armoring in specific sections, supplemented by soil bioengineering techniques such as hand seeding, planting bunchgrasses, and incorporating willow cuttings into the rock armoring. This project has been formally approved following a Notice of Determination, which certifies that the repairs and erosion control measures will not have a significant effect on the environment. The determination was approved on September 15, 2026, and signed on September 21, 2026. Diana Fong, the District Environmental Coordinator, serves as the primary point of contact for this initiative located in California.