Angus-Oslo 4 dam
Angus-Oslo 4
Located in Angus, Minnesota, the Angus-Oslo 4 dam is a vital structure designed for flood risk reduction along the Red River-TR. Completed in 2000, this earth dam stands at a height of 22 feet with a hydraulic height of 18 feet, serving as a crucial defense against potential flooding in the region. With a storage capacity of 8,068 acre-feet and a surface area of 960 acres, the dam plays a pivotal role in managing water flow and mitigating flood risks in Polk County.
Managed by the Minnesota Department of Natural Resources, the Angus-Oslo 4 dam is subject to regular inspections and maintenance to ensure its structural integrity and functionality. Classified as having a low hazard potential and a satisfactory condition assessment, the dam is equipped with an uncontrolled spillway with a width of 4,800 feet to manage excess water discharge effectively. Despite its moderate risk assessment rating, the dam continues to be a reliable asset in the local government's efforts to protect the community from potential flooding events.
As a key component of the flood risk reduction infrastructure in Minnesota, the Angus-Oslo 4 dam stands as a testament to effective water resource management and climate resilience. With its strategic location and design, this earth dam serves as a critical barrier against flooding along the Red River-TR, safeguarding the surrounding areas and populations from the impacts of extreme weather events. Through regular oversight and maintenance, the dam remains a valuable asset in the state's efforts to enhance water security and adapt to changing climate conditions.
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 Angus-Oslo 4 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Thief River Near Thief River Falls | 47 cfs | → |
| Clearwater River At Red Lake Falls | 213 cfs | → |
| Middle River At Argyle | 21 cfs | → |
| Red Lake River At Crookston | 663 cfs | → |
| Red Lake River At Fisher | 856 cfs | → |
| Cyr Creek Near Marcoux Corners | 42 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Angus-Oslo 4.
Boat launches
- 8th Street East 952, Thief River Falls
- Red Lake Falls
- Red Lake County
- Us Highway 75 Polk County
- Bridge Street Crookston
- 3rd Avenue Southeast East Grand Forks
Track Angus-Oslo 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 Angus-Oslo 4
Where does the data for Angus-Oslo 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 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 Angus-Oslo 4.