Tukwila South Project South Pond dam
Tukwila South Project South Pond
The Tukwila South Project South Pond is a flood risk reduction infrastructure located in King County, Washington. Designed by Goldsmith Associates and completed in 2011, this offstream earth dam stands at a hydraulic height of 21 feet and has a storage capacity of 164 acre-feet. With a surface area of 8.4 acres and a drainage area of 0.3 square miles, this structure plays a crucial role in managing stormwater and reducing the risk of flooding in the surrounding area.
Owned privately, the Tukwila South Project South Pond is regulated and permitted by the Washington Department of Ecology. Its satisfactory condition assessment in 2012 and low hazard potential attest to its reliability in protecting the community from potential flood events. Situated in a strategic location with a maximum discharge capacity of 119 cubic feet per second, this dam serves as a vital piece of infrastructure in the region's water resource management and climate resilience efforts.
With its primary purpose being flood risk reduction, the Tukwila South Project South Pond plays a significant role in safeguarding the community from the impacts of extreme weather events. As part of a comprehensive flood mitigation strategy, this earth dam contributes to maintaining the safety and security of residents in the area. Supported by state regulatory agencies and inspection protocols, this infrastructure reflects a commitment to sustainable water resource management and climate adaptation in the face of changing environmental conditions.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Tukwila South Project South Pond -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mill Creek Near Mouth At Orillia | 6 cfs | → |
| Spring Brook Creek At Orillia | 6 cfs | → |
| Mill Creek At Earthworks Park At Kent | 1 cfs | → |
| Duwamish River At Golf Course At Tukwila | 6,700 cfs | → |
| Cedar River At Renton | 339 cfs | → |
| Green River Near Auburn | 758 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Tukwila South Project South Pond.
Boat launches
- Lake Fenwick Trail Kent
- King County
- 148th Avenue Southeast Kent
- Shady Lake Boat Ramp
- North Lake Fishing Access Federal Way
- 47th Avenue Southwest 10203, Seattle
Campgrounds
- Point Robinson Campground
- Dash Point State Park
- Dash Point Campground
- Gig Harbor Rv Resort
- Cascadia Marine Trail
- Manchester State Park
Paddle runs
- Snoqualmie Falls To Plum's Landing
- Confluence With Taylor River To Confluence With North Fork Snoqualmie River
- Wagner Bridge To Confluence With Middle Fork Snoqualmie River
- Huckleberry Creek To Confluence With Clearwater River
- Quartz Road To Confluence With Middle Fork Snoqualmie River
- Alpine Lakes Wilderness Boundary To Quartz Creek Road
Track Tukwila South Project South Pond in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Tukwila South Project South Pond
Where does the data for Tukwila South Project South Pond come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Tukwila South Project South Pond.