Happy Valley Stormwater Detention Basin dam
Happy Valley Stormwater Detention Basin
The Happy Valley Stormwater Detention Basin, also known as the Happy Valley Retention Basin, is a crucial infrastructure managed by the local government within Bellingham City Limits in Washington. This detention basin plays a significant role in flood risk reduction by effectively storing excess stormwater and preventing potential flooding in the area. Constructed in 1981, this earth dam structure is designed to hold a maximum storage capacity of 27 acre-feet, with a hydraulic height of 14 feet.
Located along Tr-Padden Creek in Whatcom County, Washington, the Happy Valley Stormwater Detention Basin covers a surface area of 0.1 acres and serves a drainage area of 1.16 square miles. With a maximum discharge capacity of 1500 cubic feet per second, this high-hazard potential structure has been inspected and maintained regularly to ensure its satisfactory condition. The basin's emergency action plan is up-to-date, meeting regulatory guidelines for flood risk management in the region.
Managed by the Washington Dept of Ecology, the Happy Valley Stormwater Detention Basin stands as a key asset in mitigating flood risks and protecting the surrounding community from potential water-related disasters. With its strategic location within the Bellingham City Limits and efficient design, this earth dam structure serves as a vital component of the region's water resource and climate resilience efforts.
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 Happy Valley Stormwater Detention Basin -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Olsen Creek Near Bellingham | 1 cfs | → |
| Carpenter Creek At N Shore Drive Nr Bellingham | 1 cfs | → |
| Brannian Creek At S Bay Dr Nr Wickersham | 1 cfs | → |
| Nooksack River At Ferndale | 2,140 cfs | → |
| Anderson Creek At Smith Road Near Goshen | 1 cfs | → |
| Anderson Creek Near Bellingham | 3 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Happy Valley Stormwater Detention Basin.
Boat launches
- Galbriath Loop Bellingham
- Beach Avenue Whatcom County
- South Bay Drive 3186-3234, Sedro-Woolley
- Chuckanut Drive 3098, Skagit County
- East Wiser Lake Road 145, Lynden
- Guide Meridian Road Whatcom County
Campgrounds
- Cedar Lake Camp
- Pine Lake Camp
- Larrabee State Park
- Lizard Lake Camp
- Northwest Trail Site
- Cascade Marine Trail, Campsite For Human Powered Boats
Paddle runs
- Fish Hatchery To Confluence With South Fork Nooksack River
- Nooksack Falls Power Plant To Fish Hatchery Near Kendall, Wa
- 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
- Douglas Fir Campground To Mt. Baker Highway
Track Happy Valley Stormwater 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 Happy Valley Stormwater Detention Basin
Where does the data for Happy Valley Stormwater 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 Happy Valley Stormwater Detention Basin.