Crescent Weir is a private-owned concrete dam located in Kings County, California, along Zalda Creek. Built in 1933, the weir stands at 16 feet high and spans 327 feet in length, with a storage capacity of 50 acre-feet. Its primary purpose is flood risk reduction, though it also serves irrigation needs in the region. The dam has a low hazard potential and is deemed to be in satisfactory condition as of the last assessment in September 2017.

Managed by the California Department of Water Resources (DWR) and overseen by the Safety of Dams division, Crescent Weir is subject to state regulation, inspection, and enforcement. While it does not have a spillway, the weir's structure is designed to withstand hydraulic pressures, maintaining its integrity for decades. The dam's last inspection in March 2021 showed no significant issues, and it is deemed to meet safety guidelines.

Crescent Weir plays a crucial role in managing flood risks and providing water for irrigation in the region. Its location along Zalda Creek in Kings County underscores its importance in water resource management. With a history dating back to the early 20th century, the weir continues to serve its intended purposes effectively, highlighting the significance of infrastructure in safeguarding water resources and mitigating climate-related challenges.