Sage Hen dam
Sage Hen
Sage Hen is a privately-owned dam located in Ola, Idaho, within Gem County. Built in 1939 by the USDA NRCS, this earth dam stands at a height of 46.4 feet, with a hydraulic height of 37.9 feet. The dam's primary purpose is listed as "Other," with a storage capacity of 5,210 acre-feet, serving as a vital water resource for the surrounding area.
With a significant hazard potential and fair condition assessment, Sage Hen Dam is regulated by the Idaho Department of Water Resources and undergoes regular inspections for enforcement and permitting. The dam features uncontrolled spillways and slide gates for outlet control, ensuring proper water management during peak discharge events. Despite its age, the dam continues to play a crucial role in water storage and management within the region.
Ensuring the safety and reliability of Sage Hen Dam remains a priority, with a moderate risk assessment score of 3. Emergency action plans and risk management measures are yet to be updated, highlighting the need for continued monitoring and maintenance to mitigate potential hazards. As a key feature in the local water infrastructure, Sage Hen Dam stands as a testament to sustainable water resource management in the face of changing climate conditions.
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 Sage Hen -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Nf Payette River Nr Banks Id | 1,850 cfs | → |
| Middle Fork Payette River Nr Crouch Id | 223 cfs | → |
| Payette River Nr Horseshoe Bend Id | 3,490 cfs | → |
| Deadwood River Bl Deadwood Res Nr Lowman Id | 302 cfs | → |
| Weiser River Nr Cambridge Id | 110 cfs | → |
| Weiser River Nr Weiser Id | 259 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Sage Hen.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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More reservoirs
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About Sage Hen
Where does the data for Sage Hen 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 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.