Macks Creek is a dam located in Owyhee County, Idaho, built in 1993. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 58 ft58 ft tall and 1,200 ft long, taller than 95% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Macks Creek
Macks Creek is a dam in Owyhee, Idaho. The dam is private-owned. It impounds the Macks Creek Reynolds Creek near Hwy 78.
The dam stands 58 feet tall and stretches 1,200 feet across, creates a reservoir covering 26 acres, has a storage capacity of 469 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1993, the structure is 33 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/02/2018.
At 58 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Idaho |
| County | Owyhee |
| Nearest City | Hwy 78 |
| River/Stream | Macks Creek Reynolds Creek |
| Coordinates | 43.24490, -116.76090 |
Physical Characteristics
| NID Height | 58 ft |
| Dam Height | 58 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1993 (33 years old) |
Storage & Hydraulics
| NID Storage | 469 acre-ft |
| Normal Storage | 469 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 780 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/02/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00460 |
| Federal ID | ID00460 |
| More Info | State Dam Safety Program |