Dd No 4a

LITTLE ARKANSAS RIVER· McPherson, Kansas· Earth· 27 ft tall
Low Hazard Flood Risk Reduction Local Government

Key Takeaway

Dd No 4a is classified as low hazard in Kansas. Its primary use is flood risk reduction.

Physical Details

Dam Height 27 ft (taller than 57.6% in KS)
Dam Length2,500 ft
Dam TypeEarth
Max Storage1.4K acre-ft
Normal Storage220 acre-ft
Surface Area49 acres
Drainage Area3 sq mi
Max Discharge1,260 cfs
NID IDKS07397

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: KS Dept. of Agriculture

Ownership

UPPER LITTLE ARKANSAS WJD NO 95

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Dd No 4a?

Dd No 4a 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 Dd No 4a?

Dd No 4a is owned by UPPER LITTLE ARKANSAS WJD NO 95 (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Dd No 4a?

Dd No 4a serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Dd No 4a?

Dd No 4a has a dam height of 27 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.