Troy Mills Dam
Troy Mills Dam is a gravity dam located in Linn County, Iowa, built in 1989. It carries a Low hazard potential classification.
About Troy Mills Dam
The primary purpose of Troy Mills Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Troy Mills Dam Association (private). It impounds the Wapsipinicon River near Troy Mills.
The dam stands 7 feet tall and stretches 300 feet across, creates a reservoir covering 182 acres, has a maximum storage capacity of 640 acre-feet, and collects water from a drainage area of 1,210 square miles. Completed in 1989, the structure is 37 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 | Linn |
| Nearest City | Troy Mills |
| River/Stream | Wapsipinicon River |
| Coordinates | 42.28790, -91.68300 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 300 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 640 acre-ft |
| Max Storage | 640 acre-ft |
| Normal Storage | 640 acre-ft |
| Surface Area | 182 acres |
| Drainage Area | 1,210 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Troy Mills Dam Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02468 |
| Federal ID | IA02468 |
| More Info | State Dam Safety Program |