B&A Hammond #1 Reservoir Report
Nearby: B&A Hammond #2 Yellow Sarpy
Last Updated: December 5, 2025
B&A Hammond #1 is a privately owned irrigation dam located in Big Horn, Montana, along Tullock Creek.
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Summary
This earth dam, completed in 1967, stands at a height of 20 feet and has a storage capacity of 109 acre-feet. With a primary purpose of irrigation, this structure plays a crucial role in the local water resource management, particularly in sustaining agricultural activities in the region.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), B&A Hammond #1 is regulated, permitted, inspected, and enforced by the state authorities. Despite being classified as having a low hazard potential, the dam's condition is currently not rated. The emergency action plan (EAP) status, risk assessment, and risk management measures for this structure are yet to be documented, highlighting areas for potential improvement in terms of preparedness and safety protocols.
Located within Congressional District 00 of Montana, B&A Hammond #1 serves as a vital infrastructure piece for water distribution and management in the area. As climate change continues to impact water resources, the maintenance and monitoring of such structures become increasingly important to ensure the safety and sustainability of water supplies for both agricultural and community needs.
Year Completed |
1967 |
Dam Length |
75 |
Dam Height |
20 |
River Or Stream |
TULLOCK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
109 |
Hazard Potential |
Low |
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.
B&A Hammond #1