East No. 1 Beardsley Reservoir Report
Nearby: Beardsley No. 1 Brenner
Last Updated: December 6, 2025
East No.
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Summary
1 Beardsley reservoir, located in Niobrara, Wyoming, is a privately owned water resource used for fire protection, stock, and small fish pond purposes. This Earth-type dam, completed in 1959, stands at a height of 29 feet with a hydraulic height of 24 feet and a structural height of 35 feet. The reservoir has a storage capacity of 58 acre-feet with a normal storage level of 36 acre-feet and covers a surface area of 4 acres.
Despite its low hazard potential, East No. 1 Beardsley dam is in poor condition as of its last inspection in April 2017. The dam's spillway is uncontrolled with a width of 40 feet, and it lacks outlet gates. The risk assessment for the reservoir is moderate, with a DSAC assigned date and no specific risk management measures identified. Additionally, the reservoir is located in Congressional District 00 of Wyoming and falls under the jurisdiction of the State Regulatory Agency (SEO), with state permitting, inspection, and enforcement in place.
Overall, East No. 1 Beardsley presents an interesting case study for water resource and climate enthusiasts due to its unique location, purpose, and regulatory oversight. With its historical significance dating back to the late 1950s, the reservoir serves as a reminder of the importance of proper maintenance and risk management for critical infrastructure in the face of changing environmental conditions.
Year Completed |
1959 |
Dam Length |
222 |
Dam Height |
29 |
River Or Stream |
GREASEWOOD DRAW |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
24 |
Nid Storage |
58 |
Structural Height |
35 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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.
East No. 1 Beardsley