Haw Creek Reservoir Report
Last Updated: December 20, 2025
Haw Creek, located in Gem County, Idaho, is a privately owned water resource regulated by the Idaho Department of Water Resources.
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Summary
This creek is a tributary of the Payette River and serves as a vital source of water for the surrounding area. The dam on Haw Creek, completed in 1970, stands at a height of 27.1 feet and has a storage capacity of 100 acre-feet.
The dam on Haw Creek is primarily used for purposes other than flood control or water supply. It is classified as an earth dam with stone core types and is supported by rock and soil foundations. The spillway of the dam is uncontrolled with a width of 20 feet. Despite being in fair condition, the dam poses a significant hazard potential, prompting regular inspections every four years to ensure its safety and reliability. With a moderate risk assessment rating of 3, the management of Haw Creek's dam requires ongoing monitoring and risk mitigation measures to protect the surrounding community and the environment from potential hazards.
Year Completed |
1970 |
Dam Length |
740 |
Dam Height |
27.1 |
River Or Stream |
HAW CREEK PAYETTE RIVER |
Surface Area |
10 |
Hydraulic Height |
23.1 |
Drainage Area |
5.3 |
Nid Storage |
100 |
Outlet Gates |
Vertical Lift |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Haw Creek