Robbie dam
Robbie
Robbie, located in Sweet Grass, Montana, is a privately owned earth dam designed by USDA NRCS for irrigation purposes on TR-MIDDLE CREEK. It stands at a height of 25 feet and has a length of 700 feet, with a storage capacity of 98 acre-feet completed in 1977. The dam is regulated by the DNRC and is subject to state jurisdiction and permitting, inspection, and enforcement.
With a significant hazard potential, Robbie has not been rated for its condition assessment. Despite this, it continues to serve its primary purpose of irrigation for the surrounding area. The dam is located in Congressional District 00, Montana, under the representation of Greg Gianforte (R). The dam has not been modified in recent years and lacks emergency preparedness measures such as an Emergency Action Plan (EAP).
Water resource and climate enthusiasts are drawn to Robbie's role in providing vital irrigation water to the area. Its historical significance as a key infrastructure for agriculture in Montana adds to its appeal among those interested in sustainable water management practices. As concerns about climate change grow, understanding the condition and management of dams like Robbie becomes essential for ensuring the resilience of water resources in the face of evolving environmental challenges.
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 Robbie -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Musselshell River Ab Mud Cr Nr Shawmut Mt | 136 cfs | → |
| Boulder River At Big Timber Mt | 1,100 cfs | → |
| Stillwater River Near Absarokee Mt | 1,320 cfs | → |
| Musselshell River At Harlowton Mt | 245 cfs | → |
| Red Lodge Cr Ab Cooney Re Nr Boyd Mt | 19 cfs | → |
| Willow Creek Near Boyd Mt | 6 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Robbie.
Boat launches
- West Frontage Road Stillwater County
- Greycliff Bridge Sweet Grass County
- Howie Road Sweet Grass County
Campgrounds
Fishing spots
Paddle runs
- Bad Canyon Creek
- Custer Forest Boundary, Sec. 15, T5s, R15e To Absaroka-Beartooth Wilderness Boundary
More reservoirs
Track Robbie 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 Robbie
Where does the data for Robbie 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 Significant 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 Robbie.