Mallon Lake

NEOSHO RIVER-TR· Lyon, Kansas· Built 2001· Earth· 23 ft tall
Low Hazard Recreation Private

Key Takeaway

Mallon Lake is classified as low hazard in Kansas. It was completed in 2001 and is 25 years old. Its primary use is recreation.

Physical Details

Dam Height 23 ft (taller than 38.6% in KS)
Dam Length1,018 ft
Dam TypeEarth
Max Storage238 acre-ft
Normal Storage89 acre-ft
Surface Area16 acres
Drainage Area0 sq mi
Max Discharge60 cfs
Year Completed2001 (25 years old)
NID IDKS07898

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: July 16, 2001
State Regulated: Yes
Regulatory Agency: KS Dept. of Agriculture

Ownership

MALLON, JOHN

Private

Nearby Dams

North Star Subdivision Dam

Lyon, KS

Significant Hazard 25 ft

West Dam

Lyon, KS

Significant Hazard 23 ft

Paul Debauge Dam

Lyon, KS

Low Hazard 25 ft

Dam KS03551

Lyon, KS

Low Hazard 15 ft

Dam KS07897

Lyon, KS

Low Hazard 16 ft

Dam KS04725

Lyon, KS

Low Hazard 20 ft

Dd No 126

Lyon, KS

High Hazard 26 ft

Dd No 103

Lyon, KS

Low Hazard 23 ft

Frequently Asked Questions

What is the hazard classification of Mallon Lake?

Mallon Lake 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 Mallon Lake?

Mallon Lake is owned by MALLON, JOHN (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Mallon Lake built?

Mallon Lake was completed in 2001, making it 25 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 Mallon Lake?

Mallon Lake 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 Mallon Lake?

Mallon Lake has a dam height of 23 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 Mallon Lake last inspected?

Mallon Lake was last inspected on July 16, 2001. 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.