Miller #1 - Second Enlargement dam
Miller #1 - Second Enlargement
Miller #1 - Second Enlargement is a privately owned dam located in Big Horn, Wyoming, specifically on the Carrol Draw river. Built in 1972 by designer Mike W. Donnell, this earth dam stands at a height of 34 feet with a structural height of 39 feet and a length of 791 feet. The primary purpose of this dam is for irrigation, with a storage capacity of 315 acre-feet and a normal storage of 182 acre-feet.
Despite being classified as low hazard potential with a fair condition assessment, the dam has a moderate risk rating of 3. It features an uncontrolled spillway type with a width of 8 feet and an outlet gate in the form of a single valve. The last inspection was conducted in October 2017 with a frequency of every 5 years, indicating a need for regular monitoring and maintenance to ensure the safety and functionality of the structure. Overall, Miller #1 - Second Enlargement serves various purposes including fire protection, stock watering, and small fish pond in addition to irrigation, making it a crucial resource for the local community.
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 Miller #1 - Second Enlargement -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Shell Creek Near Shell | 74 cfs | → |
| Bighorn River At Kane | 1,310 cfs | → |
| Shell Creek Above Shell Creek Reservoir | 12 cfs | → |
| Bighorn River At Basin | 1,010 cfs | → |
| Little Bighorn River At State Line Nr Wyola Mt | 180 cfs | → |
| West Pass Creek Near Parkman | 10 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Miller #1 - Second Enlargement.
Campgrounds
- Bald Mountain
- Porcupine
- Porcupine Campground
- Five Springs Falls Lower Campsite 5
- Five Springs Falls Lower Campsite 2
- Five Springs Falls Lower Campsite 7
Fishing spots
- Tongue River Fishing West
- Tongue River Fishing East
- Tongue River Fishing Site
- Big Horn Lake
- Upper Paintrock Fishing Site
- Bighorn Lake
Track Miller #1 - Second Enlargement 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 Miller #1 - Second Enlargement
Where does the data for Miller #1 - Second Enlargement 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 Miller #1 - Second Enlargement.