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DNRC Headquarters
1539 Eleventh Ave. Helena, MT 59601
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Resources for Small Dams


DOWNSTREAM HAZARD ASSESSMENT FOR DAMS STORING LESS THAN 50 ACRE FEET

The “standard of care” nationwide is to know what happens below your dam should it fail. If your dam is over 50 acre feet in capacity, you should apply for a downstream hazard classification. What if your dam is under 50 acre feet? You still should know what hazards are at risk below your dam. It is possible to estimate the dam breach flood area using a few simplifying assumptions and making some basic calculations. For information and guidance, please refer to the Small Dam Hazard Assessment Inventory.

DAMS NOT SUBJECT TO DAM SAFETY ACT CONSTRUCTION PERMITTING REQUIREMENTS 

For dams Not classified as high hazard, or less than 50 acre feet please refer to this informative video with good advice.

 

Montana Code Annotated

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Administrative Rules of Montana

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Hiring an Engineer

For a list of licensed engineers who work on dams in Montana, please contact the Dam Safety Program