Lamont dam
Lamont
Lamont is a private water resource located in Franklin, Idaho, serving the city of Preston. Built in 1948 for irrigation purposes, this earth dam on the Cub River and Bear River has a height of 67.6 feet and a storage capacity of 2040 acre-feet. Despite its fair condition assessment in 2018, the dam is considered to have a high hazard potential due to its location and design.
Managed by the Idaho Department of Water Resources, Lamont is subject to state regulations, inspections, and enforcement to ensure its safety and compliance. The dam's spillway type is noted as "None," raising concerns about its ability to manage excess water flow during periods of heavy rainfall or snowmelt. With a high risk assessment rating and a history of modifications or updates, Lamont remains a focal point for ongoing monitoring and risk management measures.
In the event of an emergency, the dam has an emergency action plan (EAP) that was last revised in 2011. However, it is unclear if the EAP meets current guidelines or if inundation maps have been prepared. With a high-risk profile and the potential for significant downstream impacts, stakeholders must remain vigilant in their efforts to ensure the safety and integrity of the Lamont water resource for both agricultural and environmental purposes.
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 Lamont -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Bear River At Idaho-Utah State Line | 483 cfs | → |
| Logan River Above State Dam | 410 cfs | → |
| Logan | 68 cfs | → |
| Bear River At Pescadero | 494 cfs | → |
| Blacksmith Fork Ab U.P.&L. Co | 74 cfs | → |
| Little Bear River At Paradise | 83 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lamont.
Boat launches
- West 6200 North 6484, Cache County
- North 3000 West Cache County
- West 3000 North 4507, Cache County
- Highway 30 Cache County
- North Cisco Road Rich County
Campgrounds
- Albert Moser
- Albert Moser Campground
- Marijuana Flat Campground
- Redpoint Recreation Site
- High Creek Campground
- High Creek
Track Lamont 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 Lamont
Where does the data for Lamont 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 High 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 Lamont.