Davenport Sewage Lagoon No 4 dam
Davenport Sewage Lagoon No 4
Davenport Sewage Lagoon No 4 is a critical water resource management facility located in Davenport, Washington. Owned by the local government, this sewage lagoon is regulated by the Washington Department of Ecology and is permitted, inspected, and enforced to ensure compliance with state regulations. The lagoon, completed in 1987, serves as an offstream storage facility for Cottonwood Creek and has a capacity of 121 acre-feet with a normal storage level of 93 acre-feet.
With a structural height of 15 feet and a length of 2380 feet, Davenport Sewage Lagoon No 4 is classified as an earth dam with a rockfill core and soil foundation. This lagoon has a high hazard potential but is currently assessed as satisfactory in condition. Despite its high hazard potential, the facility has not been modified in recent years and is monitored through regular inspections to ensure its safety. In case of emergencies, the lagoon is expected to meet guidelines with an emergency action plan in place.
Overall, Davenport Sewage Lagoon No 4 plays a crucial role in managing wastewater in the area and is a key component of the local water infrastructure. With its strategic location and capacity, this facility helps protect the environment and public health by safely storing and treating sewage. As a well-maintained and regulated facility, it exemplifies the importance of proper water resource management in combating climate change and ensuring sustainable water use for future generations.
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 Davenport Sewage Lagoon No 4 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Chamokane Creek Below Falls Near Long Lake | 27 cfs | → |
| Coal Creek At Mohler | 1 cfs | → |
| Spokane River Below Nine Mile Dam At Spokane | 6,100 cfs | → |
| Little Spokane River Near Dartford | 408 cfs | → |
| Hangman Creek At Spokane | 52 cfs | → |
| Spokane River At Spokane | 5,570 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Davenport Sewage Lagoon No 4.
Boat launches
- Nitschke Road Lincoln County
- Twin Lakes Day-Use Area
- Lincoln County
- West Fancher Road, Medical Lake
- Coffeepot Lake Boat Ramp
Track Davenport Sewage Lagoon No 4 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 Davenport Sewage Lagoon No 4
Where does the data for Davenport Sewage Lagoon No 4 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 Davenport Sewage Lagoon No 4.