Moccasin Lake Dam, located in Twisp, Washington, is a privately owned structure primarily used for irrigation purposes. Constructed in 1969, this earth-type dam stands at a hydraulic height of 16.5 feet and a structural height of 9.2 feet, with a total length of 530 feet. The dam has a storage capacity of 261 acre-feet and is situated on the Tr-Thompson Creek-Offstream, serving as a vital water resource for the surrounding area.

Despite its age, Moccasin Lake Dam has been regularly inspected by the Washington Dept of Ecology, with the last assessment in 2019 rating its condition as fair. The dam is considered to have a high hazard potential, highlighting the importance of ongoing maintenance and risk management measures. With a drainage area of 0.53 square miles and a maximum discharge of 35 cubic feet per second, this dam plays a crucial role in regulating water flow and providing water for both irrigation and recreational activities in the region.

As a key component of the local water infrastructure, Moccasin Lake Dam serves as a significant resource for the community, with its upkeep and management essential for ensuring the safety and sustainability of the surrounding area. With its strategic location and important function in water management, this dam is a focal point for water resource enthusiasts and climate advocates interested in the intersection of infrastructure, environmental conservation, and community resilience.