Grant Mine Tailings Dam is a dam located in Fairbanks North Star Borough, Alaska, built in 1987. It carries a Significant hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall, taller than 68% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Grant Mine Tailings Dam
The primary purpose of Grant Mine Tailings Dam is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is private-owned.
The dam stands 30 feet tall, creates a reservoir covering 3 acres, and has a maximum storage capacity of 99 acre-feet. Completed in 1987, the structure is 39 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.
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Location
| State | Alaska |
| County | Fairbanks North Star Borough |
| Nearest City | Ester |
| Coordinates | 64.88000, -147.96030 |
Physical Characteristics
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Year Completed | 1987 (39 years old) |
Storage & Hydraulics
| NID Storage | 99 acre-ft |
| Max Storage | 99 acre-ft |
| Surface Area | 3 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Tailings |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | AK00409 |
| Federal ID | AK00409 |
| More Info | State Dam Safety Program |