Marion County Roadgrade Dam 35-77-21
Key Takeaway
Marion County Roadgrade Dam 35-77-21 is classified as low hazard in Iowa. It was completed in 1971 and is 55 years old. Its primary use is other.
Physical Details
| Dam Height | 44 ft (taller than 90.4% in IA) |
| Dam Length | 900 ft |
| Dam Type | Earth |
| Max Storage | 672 acre-ft |
| Normal Storage | 226 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | IA00650 |
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
Marion County Board of Supervisors
Local Government
Nearby Dams
Finch Dam
Marion, IA
Low Hazard 26 ftRiemer Dam
Marion, IA
Low Hazard 25 ftJohnston Dam
Marion, IA
Low Hazard 36 ftArkema Dam #2
Marion, IA
Low Hazard 27 ftArkema Dam
Marion, IA
Low Hazard 28 ftRodgers Dam
Marion, IA
Low Hazard 28 ftWhite Dam
Marion, IA
Low Hazard 35 ftShivvers Dam
Marion, IA
Low Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Marion County Roadgrade Dam 35-77-21?
Marion County Roadgrade Dam 35-77-21 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 Marion County Roadgrade Dam 35-77-21?
Marion County Roadgrade Dam 35-77-21 is owned by Marion County Board of Supervisors (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Marion County Roadgrade Dam 35-77-21 built?
Marion County Roadgrade Dam 35-77-21 was completed in 1971, making it 55 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 Marion County Roadgrade Dam 35-77-21?
Marion County Roadgrade Dam 35-77-21 serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Marion County Roadgrade Dam 35-77-21?
Marion County Roadgrade Dam 35-77-21 has a dam height of 44 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.