Summary
Built in 1934, this earth dam stands at 25 feet tall and has a storage capacity of 76 acre-feet, with a normal storage level of 65 acre-feet. The dam serves the primary purpose of irrigation, providing water to support agricultural activities in the region.
Managed by the DNRC and regulated by the state of Montana, Portwine #1 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. With no associated structures and no recent inspection dates provided, the dam remains a key component of the local water resource infrastructure. While it may not be a high-profile location, Portwine #1 plays a vital role in supporting sustainable water management practices in the area.
Although lacking detailed information regarding emergency preparedness and risk assessment measures, Portwine #1 stands as a testament to the historical development of irrigation systems in the region. As water resources and climate enthusiasts, understanding the significance of dams like Portwine #1 can provide valuable insights into the challenges and opportunities associated with managing water resources in a changing climate landscape.
Year Completed |
1934 |
Dam Length |
200 |
Dam Height |
25 |
River Or Stream |
TR-BAY HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
76 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Portwine #1