Old Mill Dam (in-channel) is a dam located in Grant County, Indiana, built in 1938. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 350 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 Old Mill Dam (in-channel)
The primary purpose of Old Mill Dam (in-channel) is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of Marion (local government). It impounds the Mississinewa River.
The dam stands 10 feet tall and stretches 350 feet across, has a maximum storage capacity of 230 acre-feet, and collects water from a drainage area of 681 square miles. Completed in 1938, the structure is well-established, with more than 75 years of service.
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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 02/25/2016. That was over 10 years ago.
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Location
| State | Indiana |
| County | Grant |
| River/Stream | Mississinewa River |
| Coordinates | 40.57475, -85.66013 |
Physical Characteristics
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 350 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 230 acre-ft |
| Max Storage | 230 acre-ft |
| Drainage Area | 681 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Marion |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 02/25/2016 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IN03554 |
| Federal ID | IN03554 |
| More Info | State Dam Safety Program |