Henry No. 1 Stock Reservoir Report
Nearby: Michelena #3 Fish Stockwater
Last Updated: December 16, 2025
Henry No.
°F
°F
mph
Wind
%
Humidity
Summary
1 Stock is a privately owned earth dam located in Arvada, Wyoming, along the Kinney Draw river. Built in 1967, it serves multiple purposes including fire protection, stock, and small fish pond. The dam has a height of 28 feet and a hydraulic height of 22 feet, with a storage capacity of 131 acre-feet and a normal storage level of 70 acre-feet. Despite its low hazard potential, the dam is currently in poor condition, with its last inspection in June 2018 revealing the need for maintenance and repairs.
The dam's spillway is uncontrolled, with a width of 70 feet, and there are no outlet gates present. The structure has a surface area of 10 acres and is primarily constructed of earth and stone materials. While the risk assessment for Henry No. 1 Stock is moderate, with a rating of 3 out of 5, there are no specific risk management measures or emergency action plans in place. With its location in a scenic area of Johnson County, Wyoming, this dam serves as a vital resource for water management and wildlife habitat but requires attention to ensure its continued functionality and safety for the surrounding community.
Overall, Henry No. 1 Stock presents a unique blend of historical significance and practical utility as a multi-purpose dam in the heart of Wyoming's countryside. With its age and current condition raising concerns about its long-term viability, stakeholders and water resource enthusiasts are encouraged to monitor the dam's status and advocate for necessary improvements to maintain its important role in supporting fire protection, stock watering, and environmental conservation efforts in the region.
Year Completed |
1967 |
Dam Length |
560 |
Dam Height |
28 |
River Or Stream |
KINNEY DRAW |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
22 |
Nid Storage |
131 |
Structural Height |
28 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Powder River At Arvada
|
206cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Clear Creek Near Buffalo
|
16cfs |
Piney Creek At Kearny
|
113cfs |
Clear Creek Near Arvada
|
256cfs |
Rock Creek Near Buffalo
|
70cfs |
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 No. 1 Stock