Hanson Reservoir Dam dam
Hanson Reservoir Dam
The Hanson Reservoir Dam, located in Meagher, Montana, is a privately owned structure designed for irrigation purposes on the Woods Gulch Creek. Completed in 1932, this earth dam stands at a height of 13 feet and has a storage capacity of 240 acre-feet, with a normal storage of 84 acre-feet. With a surface area of 28 acres and a drainage area of 29 square miles, the dam plays a crucial role in water management in the region.
Despite its age, the dam has a low hazard potential and is not currently rated for its condition. The last inspection was conducted in March 1981, indicating a need for updated assessments to ensure the safety and efficiency of the structure. While it is not under federal jurisdiction, the state regulatory agency DNRC oversees its permitting, inspection, and enforcement processes, highlighting the importance of local management in maintaining water resources and climate resilience in the area.
As a key component of the irrigation infrastructure in Great Falls, the Hanson Reservoir Dam serves as a vital water source for agricultural activities in the region. With a history dating back to the early 20th century, the dam represents a testament to the importance of water management in sustaining livelihoods and ecosystems. Continued monitoring and maintenance of the dam are essential to ensure its longevity and effectiveness in meeting the water needs of the community.
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 Hanson Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Smith River Near Ft Logan Mt | 198 cfs | → |
| Smith River Bl Eagle Cr Nr Fort Logan Mt | 371 cfs | → |
| South Fork Musselshell R Ab Martinsdale Mt | 43 cfs | → |
| Missouri River At Toston Mt | 5,170 cfs | → |
| Musselshell River Nr Martinsdale | 161 cfs | → |
| Prickly Pear Creek Near Clancy Mt | 36 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hanson Reservoir Dam.
Campgrounds
- Thompson Guard Station
- Newlan Creek Reservoir Fas
- Gipsy Lake
- Gipsy Lake Campground
- Skidway Campground
- Skidway
Fishing spots
- Newlan Reservoir
- Newlan Creek
- North Fork Smith River
- Duck Creek (Upper Missouri Drainage)
- Deep Creek (Upper Missouri Drainage)
- Sheep Creek (Smith Drainage)
Paddle runs
- Camp Baker To Eden Bridge
- Falls, Sec. 25, T14n, R4e To Smith River, Sec. 25, T14n, R3e
- Tenderfoot Creek, Sec. 30, T14n, R4e To Deep Creek, Sec. 31, T16n, R4e
- Arch Coulee Junction, Sec. 32, T13n, R11e To Forest Boundary, Sec. 35, T13n, R11e
- Missouri River
- Town Of Nelson, Sec. 12, T12n, R2w To Missouri River, Sec. 19, T12n, R2w
Track Hanson Reservoir Dam 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 Hanson Reservoir Dam
Where does the data for Hanson Reservoir Dam 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 Hanson Reservoir Dam.