Dam Report

Broken Bow Dam dam

Oklahoma, USA Mountain Fork River Hazard High
Today high
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Tonight low
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Dam height
225ft
Hazard rating
High
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Broken Bow Dam -- None dam
Broken Bow Dam None · Mountain Fork River
About this dam

Broken Bow Dam

Broken Bow Dam, located in Eagletown, Oklahoma, is a federal-owned gravity dam on the Mountain Fork River that serves multiple purposes including flood risk reduction, hydroelectric power generation, recreation, and water supply. Completed in 1968 by the US Army Corps of Engineers, the dam stands at 225 feet tall and stretches 4026 feet in length, with a maximum storage capacity of 1,598,950 acre-feet and a surface area of 20,500 acres. Despite being classified as having a high hazard potential, a risk assessment conducted by the USACE in 2017 deemed the risk associated with the dam as low, primarily driven by the potential for water seepage through rock fractures in the foundation.

To manage the potential risks associated with Broken Bow Dam, the USACE implements various risk management measures. These include conducting emergency exercises with local and state emergency responders, updating the Emergency Action Plan, developing a communication plan, and maintaining the dam through continuous operations and maintenance activities. Additionally, the dam is equipped with a robust instrumentation and monitoring system to evaluate changing conditions and ensure the structure's integrity. In the event of a dam failure, the unincorporated community of Eagletown would face the largest impacts, emphasizing the importance of proactive risk management strategies to safeguard lives and property downstream.

StateNone
River / streamMountain Fork River
NID IDOK10307
Owner typeFederal
Primary purposeFlood Risk Reduction
Dam typeGravity
Year built1968
Dam height225 ft
Dam length4,026 ft
Max storage1,598,950 AF
Normal storage918,070 AF
Surface area20,500.0 ac
Drainage area754.0 sq mi
Hazard potentialHigh
ConditionNot Available
Last inspectionWed, 30 Aug 2017 00:00:00 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 Broken Bow Dam -- inflows here typically show up in storage 24-72 hours later.

Track Broken Bow 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 Broken Bow Dam

Where does the data for Broken Bow 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 High 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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