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On Mount Lemmon, volunteers give unemployed rocks a new job: Erosion control
Volunteers have built more than 500 erosion structures since 2023 to slow runoff and reduce flood risk after the Bighorn Fire, Sky Island Alliance said.
Volunteers on Mount Lemmon build rock rundown structures to control erosion by slowing water flow along natural drainages, as explained by Emily Burns from Sky Island Alliance.
The restoration efforts began after the Bighorn Fire burned nearly 120,000 acres in the Santa Catalina Mountains in 2020, with debris control prioritized by Coronado National Forest and Sky Island Alliance.
Since 2023, Sky Island Alliance and volunteers have constructed over 500 erosion control structures near springs on Mount Lemmon to aid restoration.
Volunteers prepare and place rocks for these structures, highlighting the hands-on nature of the work.