Crescent Lake #1, located in Garfield, Colorado, is a privately owned rockfill dam constructed in 1935 for irrigation purposes. The dam stands at a height of 13 feet and has a storage capacity of 384 acre-feet, with a normal storage level of 237 acre-feet. The dam is situated on the SOUTH FORK DERBY CR, with a drainage area of 1 square mile.

Although the dam has a low hazard potential and is currently in fair condition, it is subject to state regulation, inspection, and enforcement to ensure its safety and compliance with regulations. The spillway, of uncontrolled type, has a width of 124 feet to manage maximum discharge of 1205 cubic feet per second. The dam's emergency action plan status and risk assessment are currently under review, with moderate risk identified.

Crescent Lake #1 serves as a significant water resource in the area, providing irrigation water to support agricultural activities. With its historical significance and moderate risk profile, the dam represents a vital infrastructure for water management in the region, warranting continued monitoring and maintenance to ensure its long-term functionality and safety.