Hannegan Road Detention Basin dam
Hannegan Road Detention Basin
Located in Bellingham, Washington, the Hannegan Road Detention Basin serves as a crucial flood risk reduction structure along Baker Creek. Owned and regulated by the Washington Department of Ecology, this earth-type dam was completed in 1996 and stands at a hydraulic height of 28 feet, with a structural height of 25 feet. With a storage capacity of 98 acre-feet and a drainage area of 2.07 square miles, this basin plays a vital role in managing stormwater and reducing the risk of flooding in the surrounding area.
The Hannegan Road Detention Basin covers a surface area of 1 acre and has a maximum discharge capacity of 1370 cubic feet per second. Despite being classified as having a high hazard potential, the dam's condition assessment in 2018 deemed it satisfactory. Regular inspections are carried out every 5 years to ensure the structure's integrity and safety. As a part of the local government's flood risk reduction efforts, this detention basin plays a crucial role in protecting the community from the impacts of extreme weather events and climate change.
With its strategic location and design, the Hannegan Road Detention Basin not only serves as a flood risk reduction measure but also contributes to the overall resilience of the region in the face of changing climate patterns. As climate enthusiasts and water resource experts continue to monitor and assess the impacts of climate change, structures like this detention basin play a vital role in adapting to and mitigating the effects of extreme weather events, ensuring the safety and well-being of the community for years to come.
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 Hannegan Road Detention Basin -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Carpenter Creek At N Shore Drive Nr Bellingham | 1 cfs | → |
| Olsen Creek Near Bellingham | 1 cfs | → |
| Anderson Creek At Smith Road Near Goshen | 4 cfs | → |
| Nooksack River At Ferndale | 2,290 cfs | → |
| Nooksack River At North Cedarville | 2,750 cfs | → |
| Nooksack River At Everson | 3,060 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hannegan Road Detention Basin.
Boat launches
- Galbriath Loop Bellingham
- East Wiser Lake Road 145, Lynden
- Guide Meridian Road Whatcom County
- South Bay Drive 3186-3234, Sedro-Woolley
- Beach Avenue Whatcom County
- Chuckanut Drive 3098, Skagit County
Campgrounds
- Cedar Lake Camp
- Pine Lake Camp
- Larrabee State Park
- Lizard Lake Camp
- Sumas Mtn. Outpost Cabin
- Cocoa Crossroads
Paddle runs
- Fish Hatchery To Confluence With South Fork Nooksack River
- Nooksack Falls Power Plant To Fish Hatchery Near Kendall, Wa
- Douglas Fir Campground To Mt. Baker Highway
- Headwaters In Ne1/4 Of Sec 23, T37n, R7e To Confluence With Soufh Fork Nooksack River
- Headwaters To Confluence With Bell Creek
- Bell Creek To Mt. Baker-Snoqualmie Nf Boundary
Track Hannegan Road Detention Basin 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 Hannegan Road Detention Basin
Where does the data for Hannegan Road Detention Basin 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 Hannegan Road Detention Basin.