Thompson Mtis dam
Thompson Mtis
Thompson Mtis, also known as Bruno Creek Dam, is a privately owned structure located in Custer, Idaho, near the city of Clayton. The dam was completed in 1982 and serves the primary purpose of containing tailings from mining operations. Situated along the Bruno Creek and Squaw Creek, this dam has a height of 789 feet and a storage capacity of 895,000 acre-feet, with a surface area of 320 acres and a drainage area of 2.8 square miles.
This dam is regulated by the Idaho Department of Water Resources and undergoes regular inspections to ensure its structural integrity. With a high hazard potential and fair condition assessment, the Thompson Mtis dam poses risks that are closely monitored. Although there are no spillways, the dam is equipped with other controlled outlet gates for water release. The surrounding area is at risk of inundation, prompting the need for emergency action plans and risk management measures to be in place.
Overall, Thompson Mtis represents an important water resource infrastructure in the region, playing a crucial role in managing tailings and preventing potential hazards. Its presence highlights the intersection between water resource management, climate considerations, and the need for effective regulatory oversight to ensure the safety and sustainability of such structures in the face of changing environmental conditions.
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 Thompson Mtis -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Squaw Creek Bl Bruno Creek Nr Clayton Id | 119 cfs | → |
| Thompson Creek Nr Clayton Id | 58 cfs | → |
| Yankee Fork Salmon River Nr Clayton Id | 948 cfs | → |
| Salmon River Bl Yankee Fork Nr Clayton Id | 3,150 cfs | → |
| Valley Creek At Stanley Id | 556 cfs | → |
| Pahsimeroi River At Ellis Id | 235 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Thompson Mtis.
Boat launches
Campgrounds
- Whiskey Flats Campground
- Holman Creek Campground
- Holman Creek
- Bayhorse Campground
- Big Bayhorse Campground
- Big Bayhorse
Fishing spots
Track Thompson Mtis 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 Thompson Mtis
Where does the data for Thompson Mtis 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 High 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 Thompson Mtis.