Rocky Branch Creek Watershed Site A-5

TR-ROCKY BRANCH CREEK· Jefferson, Iowa· Built 1960· Earth· 26 ft tall

Key Takeaway

Rocky Branch Creek Watershed Site A-5 is classified as low hazard in Iowa. It was completed in 1960 and is 66 years old. Its primary use is fire protection.

Physical Details

Dam Height 26 ft (taller than 24.7% in IA)
Dam Length318 ft
Dam TypeEarth
Max Storage35 acre-ft
Normal Storage15 acre-ft
Surface Area2 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1960 (66 years old)
NID IDIA00557

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
Last Inspection: August 28, 1973
State Regulated: Yes
Regulatory Agency: IOWA DNR

Ownership

Jefferson County SWCD

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Rocky Branch Creek Watershed Site A-5?

Rocky Branch Creek Watershed Site A-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 Rocky Branch Creek Watershed Site A-5?

Rocky Branch Creek Watershed Site A-5 is owned by Jefferson County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Rocky Branch Creek Watershed Site A-5 built?

Rocky Branch Creek Watershed Site A-5 was completed in 1960, making it 66 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 Rocky Branch Creek Watershed Site A-5?

Rocky Branch Creek Watershed Site A-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 Rocky Branch Creek Watershed Site A-5?

Rocky Branch Creek Watershed Site A-5 has a dam height of 26 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 Rocky Branch Creek Watershed Site A-5 last inspected?

Rocky Branch Creek Watershed Site A-5 was last inspected on August 28, 1973. Inspection dates indicate when a formal review occurred, not the results of that inspection.

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.