Blanchard Dam
Blanchard
Blanchard, a hydroelectric dam located in Sartell, Minnesota, on the Mississippi River, has been a key player in water resource management since its completion in 1925. This concrete, earth, and gravity dam stands at a height of 46 feet and has a length of 4451 feet, providing a storage capacity of 16,358 acre-feet and serving multiple purposes, including hydroelectric power generation and recreation. With a controlled spillway and Tainter radial gates, Blanchard has a maximum discharge capacity of 72,000 cubic feet per second, making it a crucial asset for flood control in the region.
Managed by the Federal Energy Regulatory Commission, Blanchard is subject to regular state inspections, permitting, and enforcement, ensuring its safety and compliance with regulations. Despite its low hazard potential, the dam is considered to have a very high risk due to its age and the surrounding environmental conditions. Emergency action plans are in place, with the last revision in December 2019, to address any potential risks or incidents efficiently. With its historical significance, operational efficiency, and strategic location on the Mississippi River, Blanchard stands as a testament to effective water resource management and climate resilience in the region.
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 Blanchard -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River Near Royalton | 1,130 cfs | → |
| Sauk River Near St. Cloud | 136 cfs | → |
| Mississippi River At St. Cloud | 1,690 cfs | → |
| Long Prairie River At Long Prairie | 71 cfs | → |
| Crow Wing River Near Pillager | 460 cfs | → |
| Mississippi River At Brainerd | 808 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Blanchard .
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Blanchard
Where does the data for Blanchard 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 below 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.
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.