Summary
Built in 1940, this gravity dam stands at 50 feet tall with a hydraulic height of 46.6 feet and a length of 705 feet. The primary purpose of Broadwater Dam is hydroelectric power generation, with additional functions including irrigation. It has a normal storage capacity of 4,100 acre-feet and a total storage of 6,460 acre-feet, serving a drainage area of 14,660 square miles.
Managed by the Federal Energy Regulatory Commission, Broadwater Dam has a controlled spillway with a width of 378 feet and a maximum discharge capacity of 68,900 cubic feet per second. The dam is equipped with seven other controlled outlet gates and is located in a high hazard potential area. While the condition assessment of the dam is currently not available, emergency action plans have been prepared and meet guidelines, ensuring proper risk management measures are in place. With its vital role in water resource management and electricity production, Broadwater Dam remains a significant structure in Montana's infrastructure landscape.
Water resource and climate enthusiasts will find Broadwater Dam a fascinating engineering marvel, contributing to the sustainable utilization of water for hydroelectricity and irrigation purposes. The dam's strategic location along the Missouri River and its high hazard potential underscore the importance of effective management and maintenance practices to ensure its safety and functionality. As a key asset in Montana's water infrastructure, Broadwater Dam exemplifies the integration of renewable energy sources and water resource management, making it a compelling site for those interested in sustainable development and environmental conservation efforts.
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15-Day Weather Outlook
Year Completed |
1940 |
Dam Length |
705 |
Dam Height |
24 |
River Or Stream |
Missouri River |
Primary Dam Type |
Gravity |
Surface Area |
327 |
Hydraulic Height |
46.6 |
Drainage Area |
14660 |
Nid Storage |
6460 |
Structural Height |
50 |
Outlet Gates |
Other Controlled - 7 |
Hazard Potential |
High |
Nid Height |
50 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Missouri River At Toston Mt
|
3310cfs |
Gallatin River At Logan Mt
|
653cfs |
Jefferson River Near Three Forks Mt
|
1090cfs |
Willow Creek Near Harrison Mt
|
11cfs |
Boulder River Near Boulder Mt
|
28cfs |
Prickly Pear Creek Near Clancy Mt
|
18cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Toston Dam
|
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LOWER TOSTON
|
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Fairweather FAS
|
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Yorks Islands FAS
|
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Deepdale FAS
|
Broadwater Dam