Henry Reservoir Report
Nearby: Green Cabin No. 3 Fowler
Last Updated: December 5, 2025
Henry is a private dam located in Clearmont, Wyoming, on the Fowler Draw river.
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Summary
Built in 1960, this earth dam serves multiple purposes including fire protection, stock watering, and as a small fish pond. With a height of 30 feet and a hydraulic height of 28 feet, Henry has a storage capacity of 47 acre-feet and a surface area of 3 acres.
Despite its low hazard potential, Henry is in poor condition as of the last inspection in June 2017. The dam has an uncontrolled spillway with a width of 40 feet and no outlet gates. The risk assessment for Henry is rated as moderate, with a risk level of 3 out of 5. While the dam is state regulated and permitted, it is currently not meeting guidelines for emergency action plans and inundation maps.
Located in Johnson County, Wyoming, Henry is a vital water resource in the area, providing essential services for fire protection and agricultural activities. Given its poor condition and moderate risk assessment, it is crucial for state regulators and owners to prioritize maintenance and emergency preparedness to ensure the safety and longevity of this important water infrastructure.
Year Completed |
1960 |
Dam Length |
250 |
Dam Height |
30 |
River Or Stream |
FOWLER DRAW |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
28 |
Nid Storage |
47 |
Structural Height |
30 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Powder River At Arvada
|
156cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Piney Creek At Kearny
|
113cfs |
Clear Creek Near Buffalo
|
12cfs |
Rock Creek Near Buffalo
|
70cfs |
Clear Creek Near Arvada
|
256cfs |
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.
Henry