SR-1 San Gregorio Embankment and Drainage Facilities Repair DO (EA 1V510)

Caltrans proposes repairing a storm damaged slopes and drainage facilities at multiple locations on State Route SR- 1 in San Mateo County from post mile PM 15.9 to 17.9. Between April 10 and April 12, 2026, an intense storm system produced heavy rainfall that generated concentrated stormwater runoff, causing erosion of the roadway embankment, damage to drainage facilities, and slope failures. Additional storms between April 20 and April 22 produced further runoff that enlarged the slope failures...