Garrison Creek 98th Avenue Detention D dam
Garrison Creek 98th Avenue Detention D
Garrison Creek 98th Avenue Detention D is a vital water management structure located in Kent, Washington, designed to mitigate flood risks and manage water resources effectively. Owned by the local government and regulated by the Washington Department of Ecology, this detention dam was completed in 1996 with a primary purpose of flood risk reduction. With a hydraulic height of 29.8 feet and a structural height of 27.34 feet, this earth dam plays a crucial role in safeguarding the surrounding area from potential hazards.
Covering a surface area of 1 acre and with a drainage area of 0.52 square miles, Garrison Creek 98th Avenue Detention D has a storage capacity of 50 acre-feet, providing essential water storage during periods of high discharge. Despite being classified as having a high hazard potential, the dam is assessed to be in fair condition, with inspections conducted every 5 years to ensure its structural integrity. The dam's location along Garrison Creek in King County underscores its significance in water resource management and climate resilience efforts in the region, making it a key asset for environmental enthusiasts and stakeholders alike.
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 Garrison Creek 98th Avenue 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 | → |
| Cedar River At Renton | 339 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Garrison Creek 98th Avenue Detention D.
Boat launches
- Lake Fenwick Trail Kent
- 148th Avenue Southeast Kent
- King County
- Shady Lake Boat Ramp
- Southeast Green Valley Road 12507-12565, Auburn
- North Lake Fishing Access Federal Way
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
- Quartz Road To Confluence With Middle Fork Snoqualmie River
- Confluence With Ipsut Creek To Western Boundary Of Mount Rainier National Park
Track Garrison Creek 98th Avenue 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 Garrison Creek 98th Avenue Detention D
Where does the data for Garrison Creek 98th Avenue 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 Garrison Creek 98th Avenue Detention D.