Mardis Barry, also known as Barry Reservoir, is a private water storage facility located in Susanville, California. Built in 1941, this Earth dam stands at a height of 14 feet and has a storage capacity of 113 acre-feet. Serving primarily as a water supply source for irrigation, Mardis Barry plays a crucial role in supporting agricultural activities in the surrounding area.

Managed by the Natural Resources Conservation Service, Mardis Barry is regulated and inspected by the California Department of Water Resources for safety and compliance. The dam's condition is assessed as satisfactory, with a significant hazard potential due to its location on the Tr Susan River. Despite its age, Mardis Barry continues to provide essential water resources for the community, ensuring a steady supply for both agricultural and domestic use.

With a history dating back to the early 1940s, Mardis Barry represents a vital piece of California's water infrastructure. Its construction and maintenance highlight the importance of effective water management in a region prone to drought and water scarcity. As climate change continues to impact water resources, facilities like Mardis Barry play a crucial role in ensuring a reliable and sustainable water supply for the future.