Shelley is a privately owned dam located in Montague, California, along the Webb Gulch river. Completed in 1952, this earth dam stands at a height of 27 feet and has a storage capacity of 364 acre-feet, serving primarily for water supply purposes, including irrigation. With a drainage area of 4.31 square miles, Shelley plays a crucial role in managing water resources in the region, especially during times of high demand or drought.

Despite being privately owned, Shelley is regulated and inspected by the California Department of Water Resources (DWR) under the Safety of Dams program. The dam is in satisfactory condition, as assessed in September 2017, with a significant hazard potential. The last inspection took place in November 2020, and the dam is subject to regular inspections to ensure its structural integrity and safety. Located in Siskiyou County, Shelley not only provides essential water supply but also contributes to the overall water management strategy in the area, helping to mitigate risks associated with water scarcity and flooding events.

With its significant role in the water supply infrastructure of the region, Shelley stands as a testament to the importance of private ownership in managing water resources effectively. As climate change continues to impact water availability and quality, dams like Shelley play a crucial role in ensuring a reliable water supply for agricultural and municipal needs. Through regular inspections and regulatory oversight, Shelley remains a valuable asset in the management of water resources in California, highlighting the need for sustainable infrastructure development in the face of changing climate conditions.