Summary
Built in 1904, this earth dam stands at 18 feet high and spans 510 feet in length, with a storage capacity of 130 acre-feet and a normal storage level of 90 acre-feet. The dam has a spillway width of 45 feet and is classified as low hazard with fair condition assessment.
Managed by the SEO regulatory agency in Wyoming, Three Mile undergoes regular inspections with a frequency of 5 years, with the last inspection conducted in July 2019. Despite its moderate risk rating, the dam has no Emergency Action Plan prepared, raising concerns about emergency preparedness in case of a failure. With Liz Cheney representing Congressional District 00, Wyoming, Three Mile serves as a vital water resource for the community of ALCOVA, providing essential water supply for various purposes.
Enthusiasts of water resources and climate will find Three Mile an intriguing case study, showcasing the intersection of historical dam construction, irrigation infrastructure, and regulatory oversight in the context of evolving climate and water management challenges. As climate change impacts continue to affect water availability and demand, understanding the operational and safety considerations of dams like Three Mile becomes increasingly important for ensuring sustainable water resource management in the region.
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15-Day Weather Outlook
Year Completed |
1904 |
Dam Length |
510 |
Dam Height |
18 |
River Or Stream |
THREE MILE CREEK |
Primary Dam Type |
Earth |
Surface Area |
30 |
Hydraulic Height |
15 |
Nid Storage |
130 |
Structural Height |
18 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
18 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Box Elder Creek At Boxelder
|
26cfs |
Deer Creek In Canyon
|
14cfs |
L Medicine Bow R At Boles Spring
|
19cfs |
Medicine Bow R Ab Seminoe Reservoir
|
71cfs |
North Platte River At Orin
|
763cfs |
Sybille Creek Ab Mule Creek
|
143cfs |
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 |
|---|---|---|
Campbell Creek
|
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Campbell Creek Campground
|
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La Prele Guard Station
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Three Mile