Reservoir A dam
Reservoir A
Reservoir A, located in Nez Perce County, Idaho, is a vital water resource managed by the Bureau of Reclamation for irrigation purposes. This Earth dam, completed in 1906, stands at a height of 61 feet and has a storage capacity of 3,300 acre-feet. Situated on Lindsay Creek, the reservoir covers an area of 155 acres and serves as a crucial water source for agricultural activities in the region.
Despite its age, Reservoir A has undergone modifications in 1999 to enhance its structural integrity and seismic resilience. The dam's spillway, with a width of 400 feet, helps manage water overflow during periods of high discharge. With a high hazard potential and moderate risk assessment rating, the reservoir is closely monitored by the Bureau of Reclamation to ensure its safety and functionality. The emergency action plan for the dam was last revised in December 2019, highlighting the importance of preparedness in case of unforeseen events.
As a key component of the irrigation infrastructure in the area, Reservoir A plays a crucial role in water management and agricultural sustainability. With its historical significance and strategic location, this reservoir continues to be a valuable asset for water resource management and climate resilience in Nez Perce County, Idaho.
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 Reservoir A -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Sweetwater Creek At Mouth At Sweetwater Id | 8 cfs | → |
| Webb Creek Near Sweetwater Id | -999,999 cfs | → |
| Lapwai Creek Nr Lapwai Id | 31 cfs | → |
| Clearwater River At Spalding Id | 31,100 cfs | → |
| Asotin Creek At Asotin | 86 cfs | → |
| Potlatch River Bel Little Potlatch Cr Nr Spalding | 119 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Reservoir A.
Boat launches
- Beaver Road Nez Perce County
- Steelhead Park
- 1st Street, Asotin
- Riverside Drive 2213-2249, Clarkston
- Waha Lake Road Nez Perce County
- Snake River Road Asotin County
Campgrounds
- Chief Timothy Campground
- Lime Hill Campsite
- Wild Goose Campsite
- Below Corral Creek Campsite
- Lower Maloney Campsite
- Middle Maloney Campsite
Paddle runs
- Grande Ronde River (Lower)
- The Confluence With The Grande Ronde River To Ends In The Slack Water Of The Lower Granite Reservoir, Located One Half Mile Above The Town Of Asotin, Washington
- Snake River - 4.01
- The Northern Boundary Of The Wallowa-Whitman National Forest To The Confluence With The Grande Ronde River
- Joseph Creek
Track Reservoir A 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 Reservoir A
Where does the data for Reservoir A 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 Reservoir A.