Held Watershed Site D-4
Key Takeaway
Held Watershed Site D-4 is classified as low hazard in Iowa. It was completed in 1978 and is 48 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 33 ft (taller than 63.3% in IA) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 123 acre-ft |
| Normal Storage | 37 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1978 (48 years old) |
| NID ID | IA01855 |
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
Plymouth County SWCD
Local Government
Nearby Dams
Held Watershed Site D-1
Plymouth, IA
Low Hazard 40 ftHeld Watershed Site D-7
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Low Hazard 42 ftHeld Watershed Site B-1
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Low Hazard 26 ftHeld Watershed Site E-3
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High Hazard 43 ftHeld Watershed Site B-3
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Low Hazard 43 ftHeld Watershed Site B-6
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Low Hazard 44 ftHeld Watershed Site B-2
Plymouth, IA
Low Hazard 43 ftHeld Watershed Site B-5
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Low Hazard 24 ftFrequently Asked Questions
What is the hazard classification of Held Watershed Site D-4?
Held Watershed Site D-4 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 Held Watershed Site D-4?
Held Watershed Site D-4 is owned by Plymouth County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Held Watershed Site D-4 built?
Held Watershed Site D-4 was completed in 1978, making it 48 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 Held Watershed Site D-4?
Held Watershed Site D-4 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 Held Watershed Site D-4?
Held Watershed Site D-4 has a dam height of 33 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.