South Magnolia Watershed Site 5
Key Takeaway
South Magnolia Watershed Site 5 is classified as low hazard in Iowa. It was completed in 1958 and is 68 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 37 ft (taller than 77.4% in IA) |
| Dam Length | 760 ft |
| Dam Type | Earth |
| Max Storage | 166 acre-ft |
| Normal Storage | 54 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | IA00476 |
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
Harrison County Board of Supervisors
Local Government
Nearby Dams
South Magnolia Watershed Site 1
Harrison, IA
Low Hazard 57 ftSouth Magnolia Watershed Site Z
Harrison, IA
Low Hazard 44 ftSouth Magnolia Watershed Site 4
Harrison, IA
Low Hazard 34 ftSouth Magnolia Watershed Site 3
Harrison, IA
Low Hazard 28 ftStraight Dam
Harrison, IA
Low Hazard 39 ftOlsen Dam
Harrison, IA
Low Hazard 52 ftHarrison County Roadgrade Dam 18-79-43
Harrison, IA
Significant Hazard 66 ftGrap Dam
Harrison, IA
Low Hazard 29 ftFrequently Asked Questions
What is the hazard classification of South Magnolia Watershed Site 5?
South Magnolia Watershed Site 5 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 South Magnolia Watershed Site 5?
South Magnolia Watershed Site 5 is owned by Harrison County Board of Supervisors (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was South Magnolia Watershed Site 5 built?
South Magnolia Watershed Site 5 was completed in 1958, making it 68 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 South Magnolia Watershed Site 5?
South Magnolia Watershed Site 5 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is South Magnolia Watershed Site 5?
South Magnolia Watershed Site 5 has a dam height of 37 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 South Magnolia Watershed Site 5 last inspected?
South Magnolia Watershed Site 5 was last inspected on April 9, 1987. Inspection dates indicate when a formal review occurred, not the results of that inspection.