Dam Report

Little Willow River Wma dam

Minnesota, USA Little Willow River Hazard Low
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Dam height
10ft
Hazard rating
Low
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Little Willow River Wma -- None dam
Little Willow River Wma None · Little Willow River
About this dam

Little Willow River Wma

Little Willow River WMA, located in Aitkin, Minnesota, is a state-owned property that includes a Fish and Wildlife Pond along the Little Willow River. The dam on the property, completed in 1973, stands at a height of 10 feet and has a length of 228 feet, with a storage capacity of 950 acre-feet. The primary purpose of the dam is for fish and wildlife management, showcasing the state's commitment to conservation and ecological preservation.

Managed by the Minnesota Department of Natural Resources, the dam at Little Willow River WMA is regulated and inspected regularly to ensure its safety and compliance with state regulations. Despite being classified as a low hazard potential structure, the dam is rated as having a very high risk due to its location and potential impact in the event of a failure. However, as of the last inspection in 2016, the dam was found to be in satisfactory condition, with no immediate concerns identified.

With its controlled spillway and satisfactory condition, Little Willow River WMA serves as a valuable resource for both wildlife and water management in the area. Enthusiasts interested in water resources and climate issues will appreciate the efforts undertaken by the state to protect and enhance the ecological balance of the Little Willow River ecosystem through this carefully managed facility.

StateNone
River / streamLittle Willow River
NID IDMN00698
Owner typeState
Primary purposeFish And Wildlife Pond
Dam typeEarth
Year built1973
Dam height10 ft
Dam length228 ft
Max storage950 AF
Normal storage450 AF
Surface area50.0 ac
Drainage area22.0 sq mi
Hazard potentialLow
ConditionSatisfactory
Last inspectionFri, 07 Oct 2016 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Little Willow River Wma -- inflows here typically show up in storage 24-72 hours later.

Track Little Willow River Wma in the Snoflo app

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FAQ

About Little Willow River Wma

Where does the data for Little Willow River Wma 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.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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