Rockport Colony #1 dam
Rockport Colony #1
Rockport Colony #1 is a privately owned earth dam located in Teton County, Montana. Completed in 1960, this dam serves multiple purposes including fire protection, stock, and small fish pond management. With a height of 7 feet and a length of 400 feet, the dam has a storage capacity of 88 acre-feet and is regulated by the DNRC, with regular inspections and enforcement measures in place to ensure its safety and functionality.
Situated on the TR-S Fork Dry Fork Marias River, Rockport Colony #1 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. While the dam has not been modified in recent years and lacks detailed risk management measures, its emergency action plan status and inundation map preparedness remain unknown. Despite these gaps in information, the dam's location in a scenic area with a diverse range of water resources makes it an intriguing site for water resource and climate enthusiasts to explore and study.
Overall, Rockport Colony #1 offers a unique opportunity for enthusiasts interested in water resources and climate to investigate a privately owned dam in a picturesque Montana setting. With its multiple purposes, regulatory oversight, and potential for further risk assessment and management, this dam presents a fascinating case study for those passionate about sustainable water resource management and the intersection of human engineering with natural ecosystems.
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 Rockport Colony #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Teton River Bl South Fork Nr Choteau Mt | 210 cfs | → |
| Badger Cr Bl Four Horns Canal Nr Browning Mt | 302 cfs | → |
| Sun River Bl Diversion Dam Nr Augusta Mt | 1,420 cfs | → |
| North Fork Sun River Near Augusta Mt | 665 cfs | → |
| Two Medicine River Bl South Fork Nr Browning Mt | 561 cfs | → |
| South Fork Sun River Near Augusta Mt | 674 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Rockport Colony #1.
Campgrounds
- Elko Campground
- West Fork Cabin
- Cave Mountain
- Cave Mountain Campground
- West Fork Teton Campground
- Green Gulch Dispersed Camp Campground
Fishing spots
- Davis Lake
- Sun River Slope Canal
- Duck Creek
- Dry Creek-Krezelok Reservoir
- Spotted Bear Compound Day Use Site Fishing Site
- Big Salmon Creek
Paddle runs
- Headwaters, Sec. 34, T28n, R11w To Swift Reservoir
- Pool Creek, Sec. 7, T28n, R12w To Falls, Sec. 25, T29n, R12w
- Fool Creek, Sec. 24, T25n, R11w To Wilderness Boundary
- Wilderness Boundary To South Fork Sun River, Sec. 26, T22n, R10w
- Headwaters, Sec. 4, T18n, R10w To North Fork Sun River, Sec. 26, T22n, R10w
- Schafer Meadows To Bear Creek (Upper)
Track Rockport Colony #1 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 Rockport Colony #1
Where does the data for Rockport Colony #1 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 Rockport Colony #1.