Mill Creek Canyon Stormwater Detention D dam
Mill Creek Canyon Stormwater Detention D
Mill Creek Canyon Stormwater Detention D, also known as Mill Creek Canyon Detention Dam, is a vital infrastructure owned by the Local Government within Kent City Limits in King County, Washington. Built in 1982 by RW Beck, this earth dam serves the primary purpose of flood risk reduction along Mill Creek, with a hydraulic height of 22 feet and a structural height of 20 feet. The dam has a normal storage capacity of 16.8 acre-feet and a maximum storage capacity of 27 acre-feet, covering a surface area of 5.6 acres and draining a 1.98 square mile area.
Situated within Congressional District 09, Washington, this dam plays a crucial role in protecting the surrounding community from potential flooding events with a maximum discharge capacity of 760 cubic feet per second. Despite being classified with a high hazard potential, the dam's condition assessment remains satisfactory as of the last inspection in May 2018. Managed by the Washington Dept of Ecology, this structure is subject to regular inspections, enforcement, and permitting to ensure its effectiveness in flood risk reduction. For water resource and climate enthusiasts, Mill Creek Canyon Stormwater Detention D stands as a testament to proactive measures taken for sustainable water management in the region.
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 Mill Creek Canyon Stormwater Detention D -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mill Creek At Earthworks Park At Kent | 1 cfs | → |
| Spring Brook Creek At Orillia | 6 cfs | → |
| Mill Creek Near Mouth At Orillia | 6 cfs | → |
| Green River Near Auburn | 758 cfs | → |
| Big Soos Creek Above Hatchery Near Auburn | 83 cfs | → |
| Duwamish River At Golf Course At Tukwila | 6,700 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mill Creek Canyon Stormwater Detention D.
Boat launches
- Lake Fenwick Trail Kent
- King County
- 148th Avenue Southeast Kent
- North Lake Fishing Access Federal Way
- Southeast Green Valley Road 12507-12565, Auburn
- Shady Lake Boat Ramp
Campgrounds
- Point Robinson Campground
- Dash Point State Park
- Dash Point Campground
- Kanaskat-Palmer State Park Campground
- Kanaskat Palmer Recreation Area
- Gig Harbor Rv Resort
Paddle runs
- Snoqualmie Falls To Plum's Landing
- Wagner Bridge To Confluence With Middle Fork Snoqualmie River
- Confluence With Taylor River To Confluence With North Fork Snoqualmie River
- Huckleberry Creek To Confluence With Clearwater River
- Confluence With Ipsut Creek To Western Boundary Of Mount Rainier National Park
- Quartz Road To Confluence With Middle Fork Snoqualmie River
Track Mill Creek Canyon Stormwater Detention D 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 Mill Creek Canyon Stormwater Detention D
Where does the data for Mill Creek Canyon Stormwater Detention D 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 High 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 Mill Creek Canyon Stormwater Detention D.