Big Mill Wetlands Dam is an earth dam located in Jackson County, Iowa, built in 1981. It carries a Low hazard potential classification.
Dam profile
NID height · 11 ft11 ft tall and 3,500 ft long. 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 Big Mill Wetlands Dam
The primary purpose of Big Mill Wetlands Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Iowa Department of Natural Resources (state). It impounds the Tr- Mill Creek near Bellevue.
The dam stands 11 feet tall and stretches 3,500 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 70 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1981, the structure is 45 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 | Iowa |
| County | Jackson |
| Nearest City | Bellevue |
| River/Stream | Tr- Mill Creek |
| Coordinates | 42.27000, -90.52450 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 3,500 ft |
| Year Completed | 1981 (45 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Iowa Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02201 |
| Federal ID | IA02201 |
| More Info | State Dam Safety Program |