Summary
Operated by a private owner, this earth-type dam boasts a height of 21.6 feet and a storage capacity of 101 acre-feet. Despite its low hazard potential, the dam's poor condition assessment raises concerns about its long-term viability.
The dam, regulated by the Montana Department of Natural Resources and Conservation (DNRC), lacks associated structures and has not been modified in recent years. Its uncontrolled spillway, with a width of 8 feet, suggests a potential risk for uncontrolled water release in case of overflow. The last inspection in July 2018 highlighted the dam's poor condition, indicating a need for maintenance and potential rehabilitation efforts to ensure its continued effectiveness in supplying water to the surrounding area.
With its moderate risk assessment and the absence of emergency action plans or inundation maps, the 26n9e22 dam presents a nuanced picture of water resource management in Montana. As climate change impacts water availability and distribution, the state faces the challenge of maintaining aging infrastructure like the 26n9e22 dam to ensure reliable water supply for its residents and ecosystems. Ongoing monitoring and investment in dam safety measures will be crucial to safeguarding this essential water resource for the future.
°F
°F
mph
Wind
%
Humidity
15-Day Weather Outlook
Dam Length |
420 |
Dam Height |
21.6 |
Primary Dam Type |
Earth |
Surface Area |
11.7 |
Hydraulic Height |
17.9 |
Nid Storage |
101 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Marias River Near Loma Mt
|
451cfs |
Teton River At Loma Mt
|
127cfs |
Missouri River At Virgelle Mt
|
7350cfs |
Missouri River At Fort Benton Mt
|
5620cfs |
Marias River Near Chester Mt
|
257cfs |
Missouri River Near Great Falls Mt
|
5160cfs |
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 |
|---|---|---|
WOOD BOTTOM RECREATION AREA
|
||
Wood Bottom Recreation Area - UMRBNM
|
||
WOOD BOTTOM
|
||
BLACK BLUFF RAPIDS
|
||
SEINEURS REACH
|
||
EVANS BEND
|
26n9e22
Marias River