Mc Masters Subwatershed 3907

TR- LITTLE SIOUX RIVER· Monona, Iowa· Built 1955· Earth· 42 ft tall

Key Takeaway

Mc Masters Subwatershed 3907 is classified as low hazard in Iowa. It was completed in 1955 and is 71 years old. Its primary use is fire protection.

Physical Details

Dam Height 42 ft (taller than 87.5% in IA)
Dam Length0 ft
Dam TypeEarth
Max Storage127 acre-ft
Normal Storage49 acre-ft
Surface Area5 acres
Drainage Area1 sq mi
Max Discharge0 cfs
Year Completed1955 (71 years old)
NID IDIA02766

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

Monona County SWCD

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Mc Masters Subwatershed 3907?

Mc Masters Subwatershed 3907 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 Mc Masters Subwatershed 3907?

Mc Masters Subwatershed 3907 is owned by Monona County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Mc Masters Subwatershed 3907 built?

Mc Masters Subwatershed 3907 was completed in 1955, making it 71 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 Mc Masters Subwatershed 3907?

Mc Masters Subwatershed 3907 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 Mc Masters Subwatershed 3907?

Mc Masters Subwatershed 3907 has a dam height of 42 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.