Pool No. 1 dam
Pool No. 1
Pool No. 1, located in Thief River Falls, Minnesota, is a federal-owned earth dam completed in 1967 with a primary purpose of serving as a water resource structure. The dam stands at 11 feet high and spans a length of 8000 feet, holding a storage capacity of 4830 acre-feet. With a low hazard potential and a condition assessment currently not rated, Pool No. 1 plays a crucial role in managing the water resources of the Thief River-TR area.
Despite not being regulated or inspected by the state, Pool No. 1 remains a key feature in the local landscape, with Collin Peterson (D) representing the area in Congress. With a maximum discharge capacity of 1300 cubic feet per second, the dam serves as a vital piece of infrastructure for flood control and water management in the region. The dam's emergency action plan status, risk assessment, and management measures are currently undisclosed, leaving room for future development and improvement in its operations.
As a significant water resource structure in Marshall County, Pool No. 1 provides valuable storage capacity for the surrounding area, with a normal storage level of 1690 acre-feet. While the dam's condition assessment is not rated, its low hazard potential indicates a level of safety for the community. With its completion dating back to 1967, Pool No. 1 continues to play a crucial role in water resource management in the region, ensuring the protection of the surrounding areas from potential flooding events.
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 Pool No. 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Thief River Near Thief River Falls | 61 cfs | → |
| Red Lake River At High Landing Nr Goodridge | 308 cfs | → |
| Roseau River Below South Fork Near Malung | 44 cfs | → |
| Clearwater River At Plummer | 98 cfs | → |
| Roseau River At Ross | 358 cfs | → |
| Clearwater River At Red Lake Falls | 229 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pool No. 1.
Track Pool 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 Pool No. 1
Where does the data for Pool 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 Pool No. 1.