Located in Issaquah, Washington, the Talus P5 Stormwater Detention Dam is a vital structure designed by Montgomery Water Group to mitigate flood risk and protect the surrounding area from potential water-related hazards.
Wind
Humidity
Completed in 2002, this earth dam stands at a hydraulic height of 24 feet and a structural height of 22 feet, with a length of 440 feet. It has a storage capacity of 12 acre-feet, with a normal storage level of 1.1 feet and a surface area of 1 acre, serving the purpose of flood risk reduction in the region.
Managed by a private owner, this stormwater detention dam is regulated by the Washington Department of Ecology, ensuring compliance with state standards for inspection, maintenance, and enforcement. Despite having a high hazard potential, the dam is assessed to be in fair condition as of August 2019, with regular inspections scheduled every 5 years to ensure its continued safety and effectiveness. The structure is situated offstream from Tibbets Creek, providing crucial flood control measures for the surrounding community in King County, Washington.
With its strategic location and effective design, the Talus P5 Stormwater Detention Dam plays a crucial role in protecting the residents of Issaquah and the environment from the impacts of flooding. As part of a comprehensive flood risk reduction strategy, this earth dam serves as a key component in the area's water resource management infrastructure, highlighting the importance of proactive measures to safeguard against potential hazards and ensure the resilience of communities in the face of changing climate conditions.
Year Completed |
2002 |
Dam Length |
440 |
River Or Stream |
Offstream - Tibbets Cr. |
Primary Dam Type |
Earth |
Surface Area |
1 |
Hydraulic Height |
24 |
Drainage Area |
0.05 |
Nid Storage |
12 |
Structural Height |
22 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
24 |
Issaquah Creek Near Mouth Near Issaquah
|
384cfs |
Issaquah Creek Near Hobart
|
172cfs |
Raging River Near Fall City
|
277cfs |
Mercer Creek Near Bellevue
|
12cfs |
Cedar River At Renton
|
6750cfs |
Duwamish River At Golf Course At Tukwila
|
6700cfs |
| Location | Reservations | Toilets |
|---|---|---|
Tolt-MacDonald Park Campground
|
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Tolt MacDonald Park
|
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Site 27
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Site 36
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Site 37
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Site 40
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