Dam Report

Wilbur D. Mills Lock And Dam dam

Arkansas, USA Arkansas Hazard Significant
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Tonight low
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Dam height
31ft
Hazard rating
Significant
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Wilbur D. Mills Lock And Dam -- None dam
Wilbur D. Mills Lock And Dam None · Arkansas
About this dam

Wilbur D. Mills Lock And Dam

Wilbur D. Mills Lock and Dam, also known as Pool 2, is a federal structure located in Arkansas on the Arkansas River. Completed in 1967, this concrete gravity dam stands at 31 feet tall with a hydraulic height of 14 feet and a structural height of 68 feet. Its primary purpose is navigation, with additional recreational benefits for enthusiasts in the area.

Managed by the US Army Corps of Engineers, this dam plays a crucial role in flood risk management in the region. With a significant hazard potential and a very high risk assessment rating, the dam is continuously monitored to ensure its structural integrity. The Corps regularly engages with local emergency managers and the public to raise awareness about the dam and develop emergency action plans to respond effectively in case of a dam-related emergency.

Despite its limited capacity to store water, Wilbur D. Mills Lock and Dam serves as a vital infrastructure for managing water levels and mitigating flood risks. Through ongoing maintenance and risk management measures, the US Army Corps of Engineers ensures the safety and functionality of this essential water resource for the surrounding communities and the environment.

StateNone
River / streamArkansas
NID IDAR00169
Owner typeFederal
Primary purposeNavigation
Dam typeConcrete
Year built1967
Dam height31 ft
Dam length10,000 ft
Max storage133,200 AF
Normal storage110,080 AF
Surface area10,600.0 ac
Drainage area160,475.0 sq mi
Hazard potentialSignificant
ConditionNot Available
Last inspectionWed, 02 Dec 2020 18:00:00 GMT
EAP preparedYes

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 Wilbur D. Mills Lock And Dam -- inflows here typically show up in storage 24-72 hours later.

Track Wilbur D. Mills Lock And Dam 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.

FAQ

About Wilbur D. Mills Lock And Dam

Where does the data for Wilbur D. Mills Lock And Dam 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 Significant 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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