Jenson No. 1 Reservoir Report
Nearby: Dilts Ranch 1-20 Hardy No. 1
Last Updated: December 8, 2025
Jenson No.
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Summary
1, located in Edgemont, Wyoming, is a privately-owned earth dam constructed in 1955 for irrigation purposes on Jenson Draw. Standing at a height of 30 feet, the dam has a storage capacity of 124 acre-feet and serves as a vital water resource for the surrounding area. Despite its low hazard potential, the dam's condition assessment is rated as poor, highlighting the need for ongoing maintenance and inspection.
The dam features an uncontrolled spillway with a width of 150 feet and is equipped with a slide (sluice gate) outlet gate for water release. However, its risk assessment indicates a moderate level of risk, emphasizing the importance of implementing effective risk management measures to ensure the safety and integrity of the structure. The last inspection of Jenson No. 1 was conducted in July 2018, with a scheduled inspection frequency of every 5 years.
In the context of changing climate patterns and increasing water demands, the maintenance and monitoring of dams like Jenson No. 1 are essential to safeguard water resources and prevent potential hazards. With its strategic location and historical significance in irrigation, Jenson No. 1 serves as a critical infrastructure for water management in Converse County, Wyoming, underlining the importance of proactive measures to address its poor condition and mitigate risks associated with its operation.
Year Completed |
1955 |
Dam Length |
531 |
Dam Height |
29 |
River Or Stream |
JENSON DRAW |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
24 |
Nid Storage |
124 |
Structural Height |
30 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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.
Jenson No. 1