Longview Sewage Lagoon No 1 dam
Longview Sewage Lagoon No 1
Longview Sewage Lagoon No 1, located in Longview, Washington, is a vital water resource managed by the local government. The lagoon, completed in 1986, serves as a key component in the treatment and disposal of sewage in the area. With a storage capacity of 207 acre-feet and a surface area of 28 acres, it plays a crucial role in maintaining water quality in the region.
This Earth dam structure, with a hydraulic height of 9 feet and a structural height of 4 feet, helps regulate the flow of water from Tr-Coal Creek Slough-Offstream. Despite its low hazard potential and not being currently rated, the Longview Sewage Lagoon No 1 is subject to regular inspections, enforcement, and permitting by the Washington Department of Ecology. With a drainage area of 0.04 square miles and a maximum discharge of 8 cubic feet per second, this facility plays a significant role in protecting the environment and public health.
As an essential part of the local water infrastructure, Longview Sewage Lagoon No 1 demonstrates the commitment of the community to effective sewage management. With its state-regulated status, regular inspections, and low hazard potential, this lagoon serves as a model for responsible water resource management. Its location in Cowlitz County, Washington, showcases the importance of sustainable practices in maintaining the quality of the region's waterways.
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 Longview Sewage Lagoon No 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Columbia River @ Beaver Army Terminal Nr Quincy | 301,000 cfs | → |
| Cowlitz River At Castle Rock | 6,530 cfs | → |
| Toutle River At Tower Road Near Silver Lake | 1,360 cfs | → |
| South Fork Toutle River At Toutle | 868 cfs | → |
| South Fork Chehalis River Near Wildwood | 56 cfs | → |
| Nf Toutle River Below Srs Near Kid Valley | 789 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Longview Sewage Lagoon No 1.
Boat launches
- Ocean Beach Highway 6105, Longview
- Clatskanie City Park
- Beaver Boat Ramp And Park
- Hendrickson Drive 333, Kalama
- Kerr Road 500, Silver Lake
- Kerry West Marina
Campgrounds
- Hudson - Parcher County Park
- County Line Park
- Clatskanie City Park
- Seaquest State Park
- Seaquest State Park Campground
- Yurt Village
Paddle runs
- Headwaters In Sw1/4 Sec 28, T9n, R5e To Mount St. Helens National Volcanic Monument Boundary
- Nehalem River
- Nw1/4 Of Sec 9, T5n, R6e To Ne1/4 Of Sec 6, T5n, R5e
- Mount St. Helens National Volcanic Monument Boundary To Mount St. Helens National Volcanic Boundary In Sw 1/4 Of Sec 32, T11n, R5e
- Mount St. Helens National Volcanic Monument Boundary To To Point River Reenters Mshnvm In Se 1/4 Of Sec 11, T10n, R5e
- Headwaters In Sw 1/4 Of Sec 8, T4n, R6e To Gifford Pinchot Nf Boundary
Track Longview Sewage Lagoon No 1 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 Longview Sewage Lagoon No 1
Where does the data for Longview Sewage Lagoon No 1 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 Low 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 Longview Sewage Lagoon No 1.