Summary
Built in 1967, this earth dam stands at a height of 14.7 feet and has a hydraulic height of 10.2 feet. With a storage capacity of 1,085 acre-feet and a surface area of 266 acres, Mcarthur serves various purposes, including flood control and water supply management for the Deep Creek and Kootenai River.
This dam poses a high hazard potential and has been assessed to be in fair condition as of August 2020. The spillway is controlled with a width of 44 feet, and the outlet gates consist of slide (sluice gate) mechanisms. Mcarthur's risk assessment is classified as very high (1), highlighting the importance of proper maintenance and emergency preparedness measures. Despite its age, Mcarthur continues to play a crucial role in water resource management within the region.
Overall, Mcarthur is an essential infrastructure in Idaho, providing vital water resource management functions for the surrounding area. With its fair condition and high hazard potential, ongoing inspections and risk management measures are crucial to ensure the safety and stability of this dam in the face of changing climate conditions. Water resource and climate enthusiasts will appreciate the strategic importance of Mcarthur in maintaining the ecological balance and water security of the region.
Year Completed |
1967 |
Dam Length |
600 |
Dam Height |
14.7 |
River Or Stream |
DEEP CREEK KOOTENAI RIVER |
Surface Area |
266 |
Hydraulic Height |
10.2 |
Drainage Area |
27.7 |
Nid Storage |
1085 |
Structural Height |
19 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pack River Nr Colburn Id
|
610cfs |
Kootenai River @ Tribal Hatchery Nr Bonners Ferry
|
15700cfs |
Kootenai River Bel Moyie River Nr Bonners Ferry Id
|
25400cfs |
Kootenai River At Leonia Id
|
24900cfs |
Priest R Outflow Nr Coolin
|
1680cfs |
Yaak River Near Troy Mt
|
1000cfs |
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.
Mcarthur
Forest Boundary, Sec. 34, T59N, R2W To Harrison Lake, Sec. 31, T62N, R2W