Danhauser, also known as Danhauser Reservoir, is a private water supply structure located in Alturas, California, along the Tr Sfk Pit River. Built in 1890, this Earth dam stands at a height of 17 feet and has a storage capacity of 1258 acre-feet. With a surface area of 208 acres and serving primarily for irrigation and water supply purposes, Danhauser plays a crucial role in supporting the local community's water needs.

Managed by the Natural Resources Conservation Service, Danhauser is regulated, inspected, and enforced by the California Department of Water Resources (DWR) under the Safety of Dams program. The dam has a high hazard potential but has been assessed as satisfactory in its condition as of September 2017. Despite its age, Danhauser continues to provide essential water resources to the region, demonstrating the importance of maintaining and monitoring infrastructure for water supply in the face of changing climate conditions.

With its historical significance dating back over a century, Danhauser highlights the intersection of water resource management, climate resilience, and infrastructure maintenance. As water enthusiasts and climate advocates, understanding the role and condition of structures like Danhauser is essential in ensuring the sustainable and safe utilization of water resources for current and future generations in California.