Rock Creek Dam

ROCK CREEK· Jasper, Iowa· Earth· 33 ft tall
Significant Hazard Recreation State Government

Key Takeaway

Rock Creek Dam is classified as significant hazard in Iowa. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 33 ft (taller than 63.3% in IA)
Dam Length1,500 ft
Dam TypeEarth
Max Storage13.7K acre-ft
Normal Storage5.5K acre-ft
Surface Area640 acres
Drainage Area41 sq mi
Max Discharge0 cfs
Year Modified1968
NID IDIA00537

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: No
Last Inspection: May 12, 2016
State Regulated: Yes
Regulatory Agency: IOWA DNR

Ownership

Iowa Department of Natural Resources

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Rock Creek Dam?

Rock Creek Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Rock Creek Dam?

Rock Creek Dam is owned by Iowa Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Rock Creek Dam?

Rock Creek Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Rock Creek Dam?

Rock Creek Dam 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.

When was Rock Creek Dam last inspected?

Rock Creek Dam was last inspected on May 12, 2016. 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.