Grazing Antelope Reservoir Report

Last Updated: December 5, 2025

Grazing Antelope, also known as Antelope Dam, is a privately owned structure located in Hedgesville, Montana.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1978 by USDA NRCS, this earth dam stands at a height of 10 feet and spans 400 feet in length. Its primary purposes include fire protection, stock watering, and serving as a small fish pond, contributing to the conservation efforts in the area.

Situated on TR-Antelope Creek with a drainage area of 43.28 square miles, Grazing Antelope has a storage capacity of 64 acre-feet and a maximum discharge of 250 cubic feet per second. Despite being classified as having low hazard potential, the dam is regulated by the Montana DNRC and undergoes state inspection, permitting, and enforcement. Grazing Antelope plays a crucial role in water resource management and climate resilience in the region.

Managed by the Natural Resources Conservation Service, Grazing Antelope serves as a vital water resource infrastructure in Wheatland County, Montana. With its strategic location and purposeful design, this dam not only supports local agriculture but also contributes to environmental conservation efforts. As water resource and climate enthusiasts, the significance of Grazing Antelope lies in its multifaceted role in promoting sustainable land use practices and ensuring water security for the community and wildlife.

Year Completed

1978

Dam Length

400

Dam Height

10

River Or Stream

TR-ANTELOPE CREEK

Primary Dam Type

Earth

Hydraulic Height

10

Drainage Area

43.28

Nid Storage

64

Hazard Potential

Low

Nid Height

10
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.