Phillippi #1 Reservoir Report
Nearby: Soda Creek Marys Lamb
Last Updated: December 5, 2025
Phillippi #1 is a private irrigation dam located in Montana, specifically in Carter County near Marmarth, North Dakota.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1952, this earthen dam stands at a height of 20 feet and has a storage capacity of 235 acre-feet, primarily used for irrigation purposes along Soda Creek. The dam is regulated and inspected by the Montana Department of Natural Resources and Conservation (DNRC) to ensure its safe operation and compliance with state regulations.
With a significant hazard potential, Phillippi #1 has not been rated for its condition assessment, indicating a need for further evaluation and potential maintenance. Despite its age, the dam continues to serve its purpose in providing water for agricultural activities in the region. The surrounding area may benefit from updated emergency action plans and risk assessments to ensure preparedness in case of any unforeseen events. As a key water resource structure in the area, monitoring and management of Phillippi #1 are essential for sustainable water use and climate resilience in the region.
Year Completed |
1952 |
Dam Length |
200 |
Dam Height |
20 |
River Or Stream |
SODA CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
235 |
Hazard Potential |
Significant |
Nid Height |
20 |
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.
Phillippi #1