Connell Wastewater Lagoons dam
Connell Wastewater Lagoons
The Connell Wastewater Lagoons in Washington state are a crucial water resource managed by the City of Connell. Designed by Anderson Perry & Assoc., these lagoons serve as offstream storage for the Providence Coulee, providing essential wastewater treatment for the community. Completed in 2000, the lagoons have a structural height of 20.5 feet and a hydraulic height of 27 feet, with a storage capacity of 90 acre-feet.
Despite being a local government-owned facility, the Connell Wastewater Lagoons are regulated, permitted, inspected, and enforced by the Washington Department of Ecology. The lagoons have a significant hazard potential but are currently in satisfactory condition. The last inspection in 2014 found the facility to be operating efficiently, with a scheduled inspection frequency of 5 years. With a surface area of 30.3 acres and a normal storage capacity of 60 acre-feet, the lagoons play a vital role in water resource management for the region.
Located in Franklin County, Washington, the Connell Wastewater Lagoons are part of the larger water infrastructure managed by the Walla Walla District of the US Army Corps of Engineers. With no associated structures or federal funding, the lagoons primarily serve the City of Connell and surrounding areas. The lagoons are a key component of the local water management system, ensuring proper treatment and storage of wastewater to protect the environment and public health.
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 Connell Wastewater Lagoons -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Palouse River At Hooper | 273 cfs | → |
| Tucannon River Near Starbuck | 171 cfs | → |
| Crab Creek Near Moses Lake | 50 cfs | → |
| Yakima River At Kiona | 1,210 cfs | → |
| Crab Creek At Irby | 9 cfs | → |
| Walla Walla River Near Touchet | 173 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Connell Wastewater Lagoons.
Boat launches
- Grant County
- Road 10 Southeast Grant County
- Casey Road Walla Walla County
- Ringold Boat Launch
- Solbeck Road Adams County
Track Connell Wastewater Lagoons 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 Connell Wastewater Lagoons
Where does the data for Connell Wastewater Lagoons 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 Significant 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 Connell Wastewater Lagoons.