SNOFLO
 



SINLAHEKIN DAM NO 2

RESERVOIR LEVELS
Rock, Soil Dam Sinlahekin Creek
April 25, 2025


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Sinlahekin Dam No 2, also known as Reflection Pond, is a state-owned earth dam located in Loomis, Washington, along Sinlahekin Creek. Designed by URS-Woodward Clyde and completed in 1949, this dam serves primarily for recreational purposes, offering a serene setting for outdoor enthusiasts to enjoy. With a structural height of 18 feet and a storage capacity of 82 acre-feet, Sinlahekin Dam No 2 provides essential water resources for the surrounding area while also creating a picturesque surface area of 10 acres.

Despite its fair condition assessment and high hazard potential, Sinlahekin Dam No 2 is regulated, permitted, inspected, and enforced by the Washington Department of Ecology, ensuring the safety and integrity of the structure. The dam's location within Okanogan County, Washington, showcases its importance in managing water resources and protecting against potential risks. With its proximity to Sinlahekin Creek and a drainage area of 64 square miles, this dam plays a crucial role in preserving the natural environment and supporting the local ecosystem.

Managed by the state and situated in Congressional District 04, Washington, Sinlahekin Dam No 2 stands as a testament to the intersection of water resource management and climate resilience. Its design, construction, and ongoing maintenance highlight the collaboration between government agencies and engineering firms to safeguard vital infrastructure and promote sustainable recreational opportunities. As enthusiasts of water resources and climate adaptation, the significance of Sinlahekin Dam No 2 cannot be understated in ensuring the well-being of both the community and the environment.

Year_Completed 1949
River_Or_Stream Sinlahekin Creek
Dam_Length 248
Primary_Dam_Type Earth
Surface_Area 10
Hydraulic_Height 18
Drainage_Area 64
Nid_Storage 82
Structural_Height 18
Hazard_Potential High
Foundations Rock, Soil
Nid_Height 18
       

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