Three Mile dam
Three Mile
Located in Albany, Wyoming, Three Mile is a privately owned irrigation dam on Three Mile Creek with a primary purpose of providing water for fire protection, livestock, small fish ponds, and irrigation. 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.
Dam data reference
Condition Assessment
- Satisfactory
- No 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.
- 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.
- 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.
Hazard Potential Classification
- High
- Dams 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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Three Mile -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Box Elder Creek At Boxelder | 26 cfs | → |
| Deer Creek In Canyon | 60 cfs | → |
| L Medicine Bow R At Boles Spring | 10 cfs | → |
| Medicine Bow R Ab Seminoe Reservoir | 38 cfs | → |
| North Platte River At Orin | 528 cfs | → |
| Sybille Creek Ab Mule Creek | 143 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Three Mile.
Campgrounds
Fishing spots
- Toltec Reservoir
- East Allen Lake
- Wheatland Reservoir #3
- Dome Rock Reservoir
- Alcova Reservoir
- Seminoe Reservoir
More reservoirs
Track Three Mile in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Three Mile
Where does the data for Three Mile come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Three Mile.