Dover D Dam #1 Reservoir Report

Last Updated: December 5, 2025

Dover D Dam #1, located in Huntley, Montana, was completed in 1977 and serves multiple purposes including fire protection, stock, and small fish pond management.


°F

°F

mph

Wind

%

Humidity

Summary

This private earth dam stands at a height of 15 feet and spans 375 feet in length, with a storage capacity of 74 acre-feet. Situated on TR-Fivemile Creek, the dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected and enforced by state authorities.

With a low hazard potential and a current condition assessment of "Not Rated," Dover D Dam #1 poses minimal risk to its surrounding area. While there have been no recent inspections or updates to the Emergency Action Plan (EAP), the dam meets state guidelines and is equipped with emergency contacts for any unforeseen events. The dam's association with the Omaha District of the US Army Corps of Engineers (USACE) is limited, with no federal agencies involved in its ownership, funding, construction, or operation.

Water resource and climate enthusiasts will appreciate the strategic placement of Dover D Dam #1 in Yellowstone County, Montana, as it plays a vital role in supporting local fire protection efforts and providing water resources for livestock and small fisheries. The dam's presence on TR-Fivemile Creek contributes to the overall watershed management and enhances the resilience of the surrounding ecosystem. As a privately owned structure with state oversight, Dover D Dam #1 represents a collaborative effort between local stakeholders and regulatory agencies to ensure the safety and sustainability of water resources in the area.

Year Completed

1977

Dam Length

375

Dam Height

15

River Or Stream

TR-FIVEMILE CREEK

Primary Dam Type

Earth

Hydraulic Height

15

Nid Storage

74

Hazard Potential

Low

Nid Height

15
       
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.