Dd No 21

PONY CREEK-TR· Brown, Kansas· Built 2003· Earth· 33 ft tall
Low Hazard Flood Risk Reduction Local Government

Key Takeaway

Dd No 21 is classified as low hazard in Kansas. It was completed in 2003 and is 23 years old. Its primary use is flood risk reduction.

Physical Details

Dam Height 33 ft (taller than 81.7% in KS)
Dam Length1,100 ft
Dam TypeEarth
Max Storage377 acre-ft
Normal Storage92 acre-ft
Surface Area13 acres
Max Discharge0 cfs
Year Completed2003 (23 years old)
Year Modified2019
NID IDKS09049

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: October 15, 2019
State Regulated: Yes
Regulatory Agency: KS Dept. of Agriculture

Ownership

PONY CREEK WJD NO 78

Local Government

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Dd No 122

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Dd No 124

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Gs Dd No 120

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Dd No 30

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Frequently Asked Questions

What is the hazard classification of Dd No 21?

Dd No 21 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 21?

Dd No 21 is owned by PONY CREEK WJD NO 78 (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Dd No 21 built?

Dd No 21 was completed in 2003, making it 23 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 Dd No 21?

Dd No 21 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 21?

Dd No 21 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 Dd No 21 last inspected?

Dd No 21 was last inspected on October 15, 2019. 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.