Jennings Reservoir Report
Nearby: Hicken Wildlife Pond Hancock-Inactive
Last Updated: December 5, 2025
Jennings, located in Duchesne, Utah, is a privately owned irrigation dam regulated by the Utah Division of Water Rights.
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Summary
Built in 1938, this earth dam stands at a height of 9 feet with a hydraulic height of 8 feet and a length of 713 feet. It has a storage capacity of 171 acre-feet and serves the primary purpose of irrigation for the surrounding area. The dam is situated on the Pleasant Valley off-stream, draining to the Green River.
Despite being classified as having a low hazard potential, Jennings has not been rated for its condition assessment. The last inspection took place in June 2018, with an inspection frequency of 5 years. The dam does not have an Emergency Action Plan prepared, and no risk assessment or management measures have been documented. Congressman Rob Bishop (R) represents the area in the US Congress, and the dam falls under the jurisdiction of the Utah Division of Water Rights for regulatory oversight.
For water resource and climate enthusiasts interested in the infrastructure of Jennings, this privately owned irrigation dam provides essential water management for the Duchesne, Utah area. With a history dating back to 1938, the dam continues to support agricultural activities in the region. However, the lack of recent condition assessments, Emergency Action Plans, and risk management measures highlight potential areas for improvement to ensure the long-term safety and sustainability of this vital water resource infrastructure.
Year Completed |
1938 |
Dam Length |
713 |
River Or Stream |
PLEASANT VALLEY-OFF STREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
8 |
Drainage Area |
0.4 |
Nid Storage |
171 |
Structural Height |
9 |
Hazard Potential |
Low |
Nid Height |
9 |
Seasonal Comparison
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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.
Jennings