Woodbury County Roadgrade Dam 30-88-43

TR- LITTLE SIOUX RIVER· Woodbury, Iowa· Built 1999· Earth· 38 ft tall
Low Hazard Other Fire Protection Stock Or Small Fish Pond Local Government

Key Takeaway

Woodbury County Roadgrade Dam 30-88-43 is classified as low hazard in Iowa. It was completed in 1999 and is 27 years old. Its primary use is other.

Physical Details

Dam Height 38 ft (taller than 80.1% in IA)
Dam Length682 ft
Dam TypeEarth
Max Storage75 acre-ft
Normal Storage34 acre-ft
Surface Area4 acres
Drainage Area1 sq mi
Max Discharge0 cfs
Year Completed1999 (27 years old)
NID IDIA03249

Safety Information

Low Hazard

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?

Emergency Action Plan: No
State Regulated: Yes
Regulatory Agency: IOWA DNR

Ownership

Woodbury County Board of Supervisors

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Woodbury County Roadgrade Dam 30-88-43?

Woodbury County Roadgrade Dam 30-88-43 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 Woodbury County Roadgrade Dam 30-88-43?

Woodbury County Roadgrade Dam 30-88-43 is owned by Woodbury County Board of Supervisors (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Woodbury County Roadgrade Dam 30-88-43 built?

Woodbury County Roadgrade Dam 30-88-43 was completed in 1999, making it 27 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 Woodbury County Roadgrade Dam 30-88-43?

Woodbury County Roadgrade Dam 30-88-43 serves the following purposes: Other, Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Woodbury County Roadgrade Dam 30-88-43?

Woodbury County Roadgrade Dam 30-88-43 has a dam height of 38 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.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.