Dodecanese Reservoir Report

Last Updated: December 5, 2025

Dodecanese, located in Loma, Chouteau, Montana, is a private earth dam completed in 1967 with a primary purpose of fire protection, stock, or small fish pond.


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Summary

With a height of 10 feet and a length of 325 feet, Dodecanese has a storage capacity of 52 acre-feet, providing a vital water resource for the area. Situated on Dugout Coulee, this dam is state-regulated by the Department of Natural Resources and Conservation (DNRC) with regular inspections and enforcement to ensure its safety and functionality.

Despite being classified as having a low hazard potential, Dodecanese's condition assessment is currently marked as 'Not Rated', signaling a need for further evaluation. The dam has not undergone a recent inspection, and its emergency action plan (EAP) status and risk management measures are also not updated. Although the dam has not been modified in recent years, there is a lack of information on its risk assessment and potential hazards, highlighting the importance of regular monitoring and maintenance to safeguard the surrounding community and water resources. As a crucial infrastructure for fire protection and water storage, Dodecanese plays a significant role in the local ecosystem and climate resilience efforts in the region.

Located in Congressional District 00, Montana, Dodecanese is part of the larger network of dams and water structures overseen by the Omaha District of the US Army Corps of Engineers. With its strategic location and purpose, Dodecanese contributes to the sustainable management of water resources in the area, supporting agricultural activities, wildlife habitat, and emergency preparedness. As climate change continues to impact water availability and quality, the maintenance and regulation of dams like Dodecanese become essential for ensuring the resilience of communities and ecosystems in the face of changing environmental conditions.

Year Completed

1967

Dam Length

325

Dam Height

10

River Or Stream

DUGOUT COULEE

Primary Dam Type

Earth

Hydraulic Height

10

Nid Storage

52

Hazard Potential

Low

Nid Height

10
       
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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.