Crystal Lake dam
Crystal Lake
Crystal Lake in Fortine, Montana is a privately owned water resource with a state-regulated dam completed in 1950. The dam, primarily used for non-federal purposes, is classified as an earth dam with a height of 30 feet and a storage capacity of 151 acre-feet. The lake, situated in Lincoln County, Montana, covers an area of 93 acres and serves as a source of water for irrigation or other purposes.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Crystal Lake poses a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam has not been inspected recently, and no emergency action plan has been prepared or updated. Despite these factors, the lake remains a vital water resource in the region, contributing to the local ecosystem and providing recreational opportunities for residents and visitors alike.
With its picturesque location and rich history dating back to the mid-20th century, Crystal Lake stands as a testament to the importance of sustainable water resource management in the face of climate change. As water resource and climate enthusiasts, it is crucial to monitor and protect such valuable assets to ensure their continued availability and resilience in the years to come.
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 Crystal Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Tobacco River Near Eureka Mt | 388 cfs | → |
| Flathead River At Flathead British Columbia | 1,260 cfs | → |
| Kootenai River Bl Libby Dam Nr Libby Mt | 9,980 cfs | → |
| Fisher River Near Libby Mt | 163 cfs | → |
| N F Flathead River Nr Columbia Falls Mt | 5,680 cfs | → |
| Flathead River At Columbia Falls Mt | 16,500 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Crystal Lake.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Crystal Lake
Where does the data for Crystal Lake 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 below 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.
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.