Trail Diversion dam
Trail Diversion
Trail Diversion is a private water resource structure located in Elmore, Idaho, along Little Canyon Creek and the Snake River. Constructed in 1962, this earth dam stands at a height of 27.6 feet, with a hydraulic height of 20.9 feet. It serves as a vital resource for water storage, with a capacity of 63 acre-feet and a drainage area of 29 square miles.
With a controlled spillway width of 36 feet and a maximum discharge of 1200 cubic feet per second, Trail Diversion plays a crucial role in managing water flow and mitigating flood risks in the region. Despite its fair condition assessment in 2017, the structure has a low hazard potential and is inspected every four years to ensure its continued safety and functionality. The risk assessment categorizes Trail Diversion as having a very high risk level, highlighting the importance of ongoing monitoring and maintenance to safeguard the surrounding communities and ecosystems from potential water-related hazards.
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 Trail Diversion -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Snake River At King Hill Id | 5,980 cfs | → |
| Sf Boise River At Anderson Ranch Dam Id | 1,580 cfs | → |
| Canyon Cr At Oregon Trail Xing Nr Mountain Home Id | 46 cfs | → |
| Malad River Nr Gooding Id | 109 cfs | → |
| N Channel Snake R @ Upper Salmon Falls Nr Hagerman | 79 cfs | → |
| Bruneau River Nr Hot Spring Id | 144 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Trail Diversion.
Boat launches
- Camas Reservoir Road Elmore County
- Fh61 Elmore County
- National Forest Development Road 113 Elmore County
- Pine Campground Boat Ramp
- Danskin Floatboat Access
Campgrounds
- Emigrant Reservoir Dispersed Recreation Site
- Blair Trail Reservoir
- Morrow Reservoir Dispersed Recreation Site
- Three Island Crossing State Park
- Adin Hall Reservoir
- Hot Springs Creek Reservoir
Paddle runs
- Snake River
- Anderson Ranch Dam To Confluence With Mennecke Creek
- Bruneau (Indian Hot Springs To Bruneau)
- Mennecke Creek To Confluence With Trail Creek
More reservoirs
Track Trail Diversion 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 Trail Diversion
Where does the data for Trail Diversion 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 Trail Diversion.