Three Mile Lake Sediment Dam is an earth dam located in Union County, Iowa, built in 1999. It carries a Low hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 480 ft long, taller than 55% 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 Three Mile Lake Sediment Dam
Three Mile Lake Sediment Dam is a dam in Union, Iowa. The dam is owned by Iowa Department of Natural Resources (state). It impounds the Tr Three Mile Creek near Three Mile Lake.
The dam stands 26 feet tall and stretches 480 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 122 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1999, the structure is 27 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. The most recent inspection on record was 10/23/2003. That was over 22 years ago.
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Location
| State | Iowa |
| County | Union |
| Nearest City | Three Mile Lake |
| River/Stream | Tr Three Mile Creek |
| Coordinates | 41.09090, -94.23860 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 480 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 122 acre-ft |
| Max Storage | 122 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Iowa Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/23/2003 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03352 |
| Federal ID | IA03352 |
| More Info | State Dam Safety Program |