Mallard Island Gma #6 is an earth dam located in McLean County, North Dakota, built in 1988. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall. 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 Mallard Island Gma #6
The primary purpose of Mallard Island Gma #6 is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by USACE (federal). It impounds the Lake Sakakawea-tr near N.
The dam stands 8 feet tall, creates a reservoir covering 17 acres, has a maximum storage capacity of 125 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1988, the structure is 38 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | North Dakota |
| County | McLean |
| Nearest City | N |
| River/Stream | Lake Sakakawea-tr |
| Coordinates | 47.56178, -101.28918 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Year Completed | 1988 (38 years old) |
Storage & Hydraulics
| NID Storage | 125 acre-ft |
| Max Storage | 125 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USACE |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ND00434 |
| Federal ID | ND00434 |
| More Info | State Dam Safety Program |