Simpson Creek Watershed Site 4

SIMPSON CREEK· Fremont, Iowa· Built 1958· Earth· 41 ft tall

Key Takeaway

Simpson Creek Watershed Site 4 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 41 ft (taller than 86.2% in IA)
Dam Length604 ft
Dam TypeEarth
Max Storage89 acre-ft
Normal Storage75 acre-ft
Surface Area5 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1958 (68 years old)
NID IDIA00401

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

Fremont County SWCD

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Simpson Creek Watershed Site 4?

Simpson Creek Watershed Site 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 Simpson Creek Watershed Site 4?

Simpson Creek Watershed Site 4 is owned by Fremont County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Simpson Creek Watershed Site 4 built?

Simpson Creek Watershed Site 4 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 Simpson Creek Watershed Site 4?

Simpson Creek Watershed Site 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 Simpson Creek Watershed Site 4?

Simpson Creek Watershed Site 4 has a dam height of 41 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.