Morton #9-231-34 Reservoir Report
Last Updated: December 8, 2025
Morton #9-231-34, located in Converse, Wyoming, is a federal-owned earth dam completed in 1960 for fire protection, stock, or small fish pond purposes.
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Summary
With a structural height of 28 feet and a hydraulic height of 24 feet, this dam serves the Falcon Draw and Cheyenne River, providing a maximum storage capacity of 20 acre-feet. Despite its low hazard potential and moderate risk assessment, the dam has not been rated for its condition, and there are no recent inspection or maintenance records available.
Situated in a scenic area near Edgemont, SD, Morton #9-231-34 is under the jurisdiction of the USDA Forest Service and falls within the Walla Walla District. The dam's spillway is uncontrolled, with a width of 20 feet, and it has a drainage area of 6 acres. While the dam has not been modified in recent years and poses a low immediate risk, there is a need for ongoing monitoring and potential upgrades to ensure its long-term safety and functionality. For water resource and climate enthusiasts, this dam represents a significant piece of infrastructure contributing to local water management and conservation efforts in the region.
Year Completed |
1960 |
Dam Length |
985 |
Dam Height |
28 |
River Or Stream |
FALCON DRAW, CHEYENNE RIVER |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
24 |
Nid Storage |
20 |
Structural Height |
28 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
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.
Morton #9-231-34