Blackhawk Lake dam
Blackhawk Lake
Blackhawk Lake, also known as Hait Dam (Upper), is a privately owned reservoir located in Valley County, Idaho. This dam on Duffner Creek, a tributary of the North Fork Payette River, was completed in 1968 for irrigation purposes. The earth dam stands at a height of 44.8 feet and has a hydraulic height of 39.5 feet, with a storage capacity of 1630 acre-feet and a surface area of 95 acres.
With a significant hazard potential and fair condition assessment, Blackhawk Lake is regulated by the Idaho Department of Water Resources. The dam features an uncontrolled spillway and slide gates for water release, with the last inspection conducted in May 2017. The risk assessment for the dam rates it as moderate, highlighting the importance of ongoing monitoring and maintenance to ensure the safety of the surrounding community and water resources in the area.
Blackhawk Lake serves as a vital water resource for irrigation in the region, supporting agricultural activities and providing water storage for the local community. Located in a picturesque setting near Payette River, this dam underscores the importance of sustainable water management practices in the face of changing climate conditions. Enthusiasts of water resources and climate will find Blackhawk Lake to be a fascinating example of human-built infrastructure interacting with the natural environment in a dynamic and critical way.
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 Blackhawk Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Nf Payette River At Mccall Id | 825 cfs | → |
| Lake Fork Payette River Ab Jumbo Cr Nr Mccall Id | 529 cfs | → |
| Sf Salmon River Nr Krassel Ranger Station Id | 1,330 cfs | → |
| Weiser River Nr Cambridge Id | 420 cfs | → |
| Johnson Creek At Yellow Pine Id | 1,380 cfs | → |
| Snake River At Hells Canyon Dam Id-Or State Line | 19,200 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Blackhawk Lake.
Boat launches
- Valley County
- Warren Wagon Road Mccall
- Fisher Creek Road Adams County
- Grouse Creek Campground Road Adams County
- Granite Lake Dam Road Valley County
- National Forest Development Road 422 Valley County
Campgrounds
- Mccall Campground & Rv Park
- Ponderosa State Park
- Donnelly Lakeside City Park
- Rainbow Point Campground - Reserve
- Amanita Campground - Reserve
- Amanita
Track Blackhawk Lake 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 Blackhawk Lake
Where does the data for Blackhawk Lake 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 Blackhawk Lake.