Clear Lake Dike 1, located in Modoc County, California, is a rockfill dam with a primary purpose of irrigation. Built in 1910 by the Bureau of Reclamation, this structure stands at a height of 13 feet and has a hydraulic height of 6 feet. With a storage capacity of 584,050 acre-feet and a surface area of 23,960 acres, Clear Lake Dike 1 plays a crucial role in managing water resources for agricultural needs in the region.

This dam, situated on the Lost River, is owned and operated by the Bureau of Reclamation and falls under federal jurisdiction. Despite being classified as having a low hazard potential, Clear Lake Dike 1 undergoes regular inspections by the Bureau of Reclamation to ensure its structural integrity and safety. The surrounding area benefits from the controlled water release through a 357-foot uncontrolled spillway, which helps prevent flooding and maintain a stable water supply for irrigation in the region.

As a key component of the water management infrastructure in the area, Clear Lake Dike 1 contributes to the overall sustainability of water resources in Modoc County. With its moderate risk assessment rating and a history dating back over a century, this dam continues to play a vital role in supporting agriculture and maintaining a reliable water supply for the local community.