Andreasen Lower dam
Andreasen Lower
Located in Thatcher, Idaho, the Andreasen Lower dam plays a crucial role in irrigation, serving as a key water resource for the region since its completion in 1960. With a height of 33.1 feet and a hydraulic height of 29.3 feet, the dam holds a storage capacity of 100 acre-feet, providing water for agricultural purposes in the area. The dam is primarily constructed with earth and stone materials, supported by rock and soil foundations, making it a vital infrastructure for water management in the region.
State regulated and inspected by the Idaho Department of Water Resources, Andreasen Lower dam is deemed to have a significant hazard potential, although its condition assessment as of August 2017 was satisfactory. The dam has a spillway type of uncontrolled with a maximum discharge capacity of 12 cubic feet per second, ensuring proper water flow management during peak times. Despite facing a moderate risk level, the dam continues to meet guidelines for operation and maintenance, highlighting its importance in ensuring water security for the surrounding community.
With its location in Franklin County, Idaho, Andreasen Lower dam stands as a testament to effective water resource management, providing essential irrigation water for agricultural activities in the region. As a privately owned structure, the dam undergoes regular inspections and maintenance, ensuring its structural integrity and fulfilling its primary purpose of supporting the local farming community. As climate change impacts water availability, the Andreasen Lower dam remains a vital infrastructure for sustainable water resource management in the area, playing a crucial role in maintaining the region's agricultural productivity and water security.
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 Andreasen Lower -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Bear River At Pescadero | 502 cfs | → |
| Bear River At Idaho-Utah State Line | 625 cfs | → |
| Portneuf River At Topaz Id | 201 cfs | → |
| Marsh Creek Nr Mccammon Id | 22 cfs | → |
| Blackfoot River Ab Reservoir Nr Henry Id | 89 cfs | → |
| Bear River At Border | 272 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Andreasen Lower.
Campgrounds
- Redpoint
- Maple Grove
- Redpoint Recreation Site
- Heart Mountain Springs Recreation Site
- Heart Mountain Spring
- Emigration Campground
Paddle runs
- Black Canyon - Highway 34 To Grace Powerhouse
- Confluence With Snowslide Creek To West Boundary Of Patented Mining Claim Just Inside The Caribou Nf Boundary
- Hgh Creek Lake To Nf Boundary
- Idaho State Line To Confluence With Beaver Creek
- Source To Mouth
- Southern Boundary Of State Land To Mouth
Track Andreasen Lower 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 Andreasen Lower
Where does the data for Andreasen Lower 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 Andreasen Lower.