Montecito Debris Basin Construction and Modification Program

About the Program

Category: Risk and Emergency Management (Best in Category)

Year: 2023

After the Thomas Fire and 1/9 Debris Flow events, the Santa Barbara County Public Works Department implemented a long-term program to build two new debris basins and modify three others. This program will enhance safety, allow more sediment to reach the ocean, reduce the time and money spent on maintenance, and improve fish passage for the endangered California Steelhead Trout. The existing system of basins is built along creeks, and it intercepts debris that comes down from the mountains above the community of Montecito. These basins - Cold Springs, San Ysidro, and Romero - have played an increased role in protecting downstream communities due to the increase in wildfires over the past two decades. The Randall Road Basin was proposed by private interests and received general support from the area's affected property owners. The basin was first tested months after construction was complete when a storm passed through the area on the fifth anniversary of the 1/9 Debris Flow. The storm filled the basin with approximately 15,000 cubic yards of material that historically would have blocked state highways 192 and 101 and damaged structures downstream. Construction on the new Buena Vista Debris Basin is expected in 2024.