SNOFLO
 



RAVENSDALE PIT

RESERVOIR LEVELS
Soil Dam Tr-Green River
April 23, 2025


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Ravensdale Pit is a privately owned dam located in Ravensdale, King County, Washington. Built in 1972, this Earth-type structure stands at a height of 18 feet and spans a length of 2950 feet, with a storage capacity of 165 acre-feet. Situated on the Tr-Green River, the dam serves a primary purpose other than flood control or water supply, and is regulated by the Washington Department of Ecology.

Despite its low hazard potential, Ravensdale Pit has not been rated for its condition since its last inspection in 1999. The dam's emergency action plan status, risk assessment, and inundation maps remain unprepared or updated. While the structure meets regulatory guidelines and is subject to regular inspections, its overall risk management measures and emergency preparedness are lacking in documentation.

For water resource and climate enthusiasts, Ravensdale Pit presents an intriguing case study in dam infrastructure management and emergency preparedness. With its unique characteristics and historical data, this site offers valuable insights into the challenges and opportunities of maintaining and regulating water storage structures in the Pacific Northwest region.

Year_Completed 1972
River_Or_Stream Tr-Green River
Dam_Length 2950
Primary_Dam_Type Earth
Surface_Area 17
Hydraulic_Height 18
Drainage_Area 1.43
Nid_Storage 165
Structural_Height 18
Hazard_Potential Low
Foundations Soil
Nid_Height 18
       

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