Linn Grove Milldam
Key Takeaway
Linn Grove Milldam is classified as low hazard in Iowa. It was completed in 1924 and is 102 years old. Its primary use is recreation.
Physical Details
| Dam Height | 9 ft (taller than 1.7% in IA) |
| Dam Length | 338 ft |
| Dam Type | Gravity |
| Max Storage | 416 acre-ft |
| Normal Storage | 416 acre-ft |
| Surface Area | 90 acres |
| Drainage Area | 1,548 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1924 (102 years old) |
| NID ID | IA01308 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Buena Vista County Conservation Board
Local Government
Nearby Dams
Haroldsen Dam
Buena Vista, IA
Low Hazard 35 ftSioux Rapids Golf Club Dam
Buena Vista, IA
Low Hazard 41 ftPhillips Dam
Clay, IA
Low Hazard 24 ftGerlach Dam
Buena Vista, IA
Low Hazard 31 ftGustafson Lake Dam
Buena Vista, IA
Significant Hazard 49 ftGarton Subwatershed M-4619
Buena Vista, IA
Low Hazard 27 ftIowa Noname66
Buena Vista, IA
Low Hazard 27 ftAnderson Dam
Clay, IA
Low Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Linn Grove Milldam?
Linn Grove Milldam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Linn Grove Milldam?
Linn Grove Milldam is owned by Buena Vista County Conservation Board (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Linn Grove Milldam built?
Linn Grove Milldam was completed in 1924, making it 102 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Linn Grove Milldam?
Linn Grove Milldam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Linn Grove Milldam?
Linn Grove Milldam has a dam height of 9 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Linn Grove Milldam last inspected?
Linn Grove Milldam was last inspected on June 3, 1999. Inspection dates indicate when a formal review occurred, not the results of that inspection.