Eastdale Creek Detention No.1 Reservoir Report
Last Updated: December 14, 2025
Located in Casper, Wyoming, Eastdale Creek Detention No.1 is a crucial water management structure designed for flood risk reduction along the Holman Draw river.
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Summary
This earth dam, standing at 24 feet high with a hydraulic height of 19 feet, was completed in 2008 and serves a primary purpose of flood risk reduction. With a storage capacity of 57 acre-feet and a drainage area of 1.89 square miles, the dam plays a vital role in protecting the surrounding areas from potential flooding events.
Despite its low hazard potential and fair condition assessment, Eastdale Creek Detention No.1 is regularly inspected by the state regulatory agency to ensure its structural integrity and operational effectiveness. The dam features an uncontrolled spillway and has a maximum discharge capacity of 437 cubic feet per second. With its stone core and soil foundation, the dam covers a surface area of 5 acres and provides essential flood protection for the local community, showcasing the importance of sustainable water resource management in mitigating climate-related risks.
Maintaining a moderate risk rating, Eastdale Creek Detention No.1 continues to be a critical infrastructure asset in the region, overseen by local government authorities and adhering to state permitting and inspection requirements. With its strategic location and design, this detention structure serves as a testament to the ongoing efforts to safeguard water resources and combat the impacts of climate change in Wyoming's Natrona County.
Year Completed |
2008 |
Dam Length |
182 |
Dam Height |
24 |
River Or Stream |
HOLMAN DRAW |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
19 |
Drainage Area |
1.89 |
Nid Storage |
57 |
Structural Height |
24 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Beartrap - Casper Mountain Park
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Casper KOA Journey
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Lodge Pole
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Rim Campsite 4
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Rim Campsite 1
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Rim Campsite 5
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Eastdale Creek Detention No.1
North Platte River