Deer Creek Diversion, also known as Deer Creek Reservoir, is a crucial water management infrastructure located in Nevada City, California. This public utility serves multiple purposes including debris control, flood risk reduction, irrigation, tailings management, and water supply. The dam, completed in 1928, stands at a height of 92 feet and has a storage capacity of 1400 acre-feet, providing essential water resources for the surrounding area.

Managed by the California Department of Water Resources and regulated for safety by the DWR, Safety of Dams, Deer Creek Diversion plays a vital role in ensuring the resilience of the local water supply and mitigating potential hazards. With a high hazard potential due to its location and function, the dam's condition has been assessed as satisfactory as of September 2017. Regular inspections are conducted to maintain its safety and functionality, with the last inspection taking place in October 2020.

As a key component in the water infrastructure of the region, Deer Creek Diversion serves as a critical tool for managing water resources and protecting against potential risks. Its strategic location on Deer Creek, combined with its multiple purposes and high hazard potential, highlights the importance of this structure in safeguarding the community's water supply and enhancing resilience to changing climate conditions. With ongoing maintenance and regulatory oversight, Deer Creek Diversion continues to play a vital role in water resource management and climate adaptation efforts in Nevada City, California.