Grassy Creek Watershed Dam G- 66

GRASSY CREEK· Lewis, Missouri· Built 1990· Earth· 25 ft tall

Key Takeaway

Grassy Creek Watershed Dam G- 66 is classified as low hazard in Missouri. It was completed in 1990 and is 36 years old. Its primary use is flood risk reduction.

Physical Details

Dam Height 25 ft (taller than 23.5% in MO)
Dam Length327 ft
Dam TypeEarth
Max Storage70 acre-ft
Normal Storage19 acre-ft
Surface Area6 acres
Drainage Area230 sq mi
Max Discharge177 cfs
Year Completed1990 (36 years old)
NID IDMO50893

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: September 11, 1999
State Regulated: No

Ownership

GRASSY CK SUBDISTRICT

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Grassy Creek Watershed Dam G- 66?

Grassy Creek Watershed Dam G- 66 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 Grassy Creek Watershed Dam G- 66?

Grassy Creek Watershed Dam G- 66 is owned by GRASSY CK SUBDISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Grassy Creek Watershed Dam G- 66 built?

Grassy Creek Watershed Dam G- 66 was completed in 1990, making it 36 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 Grassy Creek Watershed Dam G- 66?

Grassy Creek Watershed Dam G- 66 serves the following purposes: Flood Risk Reduction, Fire Protection, Stock, Or Small Fish Pond, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Grassy Creek Watershed Dam G- 66?

Grassy Creek Watershed Dam G- 66 has a dam height of 25 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 Grassy Creek Watershed Dam G- 66 last inspected?

Grassy Creek Watershed Dam G- 66 was last inspected on September 11, 1999. 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.