Hancock-Inactive Reservoir Report
Nearby: Hicken Wildlife Pond Jennings
Last Updated: December 5, 2025
Hancock-Inactive, also known as Breached, is a private earth dam located in Duchesne, Utah, along the Pleasant Valley Wash.
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Summary
Built in 1966 by USDA NRCS, this dam was designed for irrigation purposes with a storage capacity of 70 acre-feet. With a dam height of 11 feet and a spillway type of Uncontrolled, Hancock-Inactive has a low hazard potential and a moderate risk assessment rating.
Despite being inactive, this dam serves as a reminder of the importance of water resource management and climate resilience in the region. While its current condition assessment is not available, the USDA NRCS continues to be the primary source agency associated with this structure. The risk management measures and emergency action plans for Hancock-Inactive are not fully documented, highlighting the need for ongoing monitoring and evaluation to ensure the safety and integrity of the dam.
As climate change continues to impact water resources and infrastructure, understanding the history and condition of structures like Hancock-Inactive is crucial for informed decision-making and preparedness. With a focus on irrigation and the surrounding community's water needs, this dam represents a piece of Utah's water management history that warrants further attention and consideration in the face of evolving climate challenges.
Year Completed |
1966 |
Dam Length |
1060 |
Dam Height |
11 |
River Or Stream |
Pleasant Valley Wash |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
7 |
Drainage Area |
1 |
Nid Storage |
70 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
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.
Hancock-Inactive