Dam Report

Capricorn dam

Montana, USA Tr-Ninemile Coulee Hazard Low
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Tonight low
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Dam height
24ft
Hazard rating
Low
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Capricorn -- None dam
Capricorn None · Tr-Ninemile Coulee
About this dam

Capricorn

Capricorn, located in Kremlin, Montana, is a privately owned earth dam constructed in 1965 by the USDA NRCS for purposes such as fire protection, stock watering, and small fish pond management. With a height of 24 feet and a length of 500 feet, Capricorn has a capacity of 57 acre-feet and serves a drainage area of 12.5 square miles along the TR-Ninemile Coulee.

Managed by the DNRC, Capricorn has a low hazard potential and is deemed to be in "Not Rated" condition. The dam's primary purpose of fire protection and stock watering underscores its critical role in the local ecosystem. With a maximum discharge capacity of 220 cfs, the dam provides essential water resource management in Hill County, Montana.

Despite its age, Capricorn has not been rated for its condition and lacks an Emergency Action Plan. However, its strategic location and purpose make it a valuable asset for water resource and climate enthusiasts. The dam's association with the Natural Resources Conservation Service highlights its importance in sustainable land and water management practices in the region.

StateNone
River / streamTr-Ninemile Coulee
NID IDMT03448
Owner typePrivate
Primary purposeFire Protection, Stock, Or Small Fish Pond
Dam typeEarth
Year built1965
Dam height24 ft
Dam length500 ft
Max storage57 AF
Normal storage33 AF
Drainage area12.5 sq mi
Hazard potentialLow
ConditionNot Rated

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Capricorn -- inflows here typically show up in storage 24-72 hours later.

Track Capricorn 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.

FAQ

About Capricorn

Where does the data for Capricorn 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.

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Premium feature

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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