Linn Grove Milldam
Linn Grove Milldam is a gravity dam located in Buena Vista County, Iowa, built in 1924. It carries a Low hazard potential classification.
About Linn Grove Milldam
The primary purpose of Linn Grove Milldam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Buena Vista County Conservation Board (local government). It impounds the Little Sioux River near Linn Grove.
The dam stands 9 feet tall and stretches 338 feet across, creates a reservoir covering 90 acres, has a maximum storage capacity of 416 acre-feet, and collects water from a drainage area of 1,548 square miles. Completed in 1924, the structure is over a century 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 06/03/1999. That was over 26 years ago.
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Location
| State | Iowa |
| County | Buena Vista |
| Nearest City | Linn Grove |
| River/Stream | Little Sioux River |
| Coordinates | 42.89560, -95.24480 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 338 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 416 acre-ft |
| Max Storage | 416 acre-ft |
| Normal Storage | 416 acre-ft |
| Surface Area | 90 acres |
| Drainage Area | 1,548 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Buena Vista County Conservation Board |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 06/03/1999 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01308 |
| Federal ID | IA01308 |
| More Info | State Dam Safety Program |