Schoolhouse #4 Reservoir Report
Nearby: Schoolhouse #6 Schoolhouse #7
Last Updated: February 22, 2026
Schoolhouse #4 is a privately owned earth dam located in Malta, Montana, along the TR-TRESSLER COULEE river.
Summary
Built in 1973, this dam serves multiple purposes including fire protection, stock watering, and small fish pond management. With a height of 12 feet and a length of 300 feet, Schoolhouse #4 has a storage capacity of 71 acre-feet and a low hazard potential rating.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Schoolhouse #4 is regularly inspected, permitted, and enforced to ensure its safety and compliance with state regulations. Despite being classified as "Not Rated" in terms of condition assessment, the dam provides essential services to the local community and contributes to water resource management in the area. Water resource and climate enthusiasts would find this structure an interesting case study for sustainable water infrastructure in rural Montana.
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Humidity
15-Day Weather Outlook
Year Completed |
1973 |
Dam Length |
300 |
Dam Height |
12 |
River Or Stream |
TR-TRESSLER COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Nid Storage |
71 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Milk River Near Dodson Mt
|
68cfs |
Milk River At Malta Mt
|
146cfs |
Peoples Creek Near Hays Mt
|
4cfs |
Beaver Cr Bl Guston Coulee Nr Saco Mt
|
67cfs |
Milk River Near Harlem Mt
|
69cfs |
Missouri River Near Landusky Mt
|
9100cfs |
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.
Schoolhouse #4