Trossachs Detention Pond Pc-2, located in Carnation, Washington, is a crucial water management structure owned by the local government.
Wind
Humidity
This detention pond plays a key role in flood risk reduction along Patterson Creek, serving as an offstream solution in the King County area. Built in 2002 by ESM, the pond has a hydraulic height of 17 feet and a storage capacity of 55 acre-feet, with a normal storage level of 43 acre-feet, covering a surface area of 4.3 acres.
With a high hazard potential but a satisfactory condition assessment, Trossachs Detention Pond Pc-2 undergoes regular inspections every five years to ensure its structural integrity and functionality. The Washington Department of Ecology is the primary regulatory agency overseeing its operations, permitting, and enforcement. The pond has a maximum discharge capacity of 85 cubic feet per second, serving as a vital component in the overall water resource management strategy for the region. Despite its critical role in flood control, the pond has not undergone any modifications since its construction, highlighting its effective design and functionality in mitigating flood risks in the area.
Year Completed |
2002 |
Dam Length |
1200 |
River Or Stream |
Patterson Creek - Offstream |
Primary Dam Type |
Earth |
Surface Area |
4.3 |
Hydraulic Height |
17 |
Drainage Area |
0.22 |
Nid Storage |
55 |
Structural Height |
17 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
17 |
Issaquah Creek Near Mouth Near Issaquah
|
384cfs |
Raging River Near Fall City
|
277cfs |
Snoqualmie River Near Carnation
|
13800cfs |
Snoqualmie River Near Snoqualmie
|
6340cfs |
Issaquah Creek Near Hobart
|
172cfs |
Mercer Creek Near Bellevue
|
12cfs |
| 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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