On Mount Lemmon, volunteers give unemployed rocks a new job: Erosion control
Summary
Volunteers on Mount Lemmon in Arizona are building rock structures to control erosion and protect the soil and water after a large wildfire in 2020. These structures slow down rainwater, catch soil, and help prevent debris from washing into streams and rivers.Key Facts
- Volunteers worked on August 2, 2026, building erosion control structures on Mount Lemmon.
- The project is organized by Sky Island Alliance, a nonprofit group focused on protecting nature in Arizona and nearby areas.
- The erosion control structures are made from rocks placed carefully to slow water flow and catch soil.
- These efforts help reduce the impact of debris after the 2020 Bighorn Fire burned over 120,000 acres.
- Since 2023, over 500 erosion control structures have been built by volunteers and Sky Island Alliance.
- The Bighorn Fire affected the Santa Catalina Mountains, which include Mount Lemmon.
- Volunteers learned how to pick the right rocks and place them like a puzzle to best control erosion.
- The work supports partnerships between Sky Island Alliance and the Coronado National Forest.
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