South Fork Blackwater F-1

TR-BRIAR CREEK· Johnson, Missouri· Built 1980· Earth· 48 ft tall
Significant Hazard Flood Risk Reduction Local Government

Key Takeaway

South Fork Blackwater F-1 is classified as significant hazard in Missouri. It was completed in 1980 and is 46 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 48 ft (taller than 94.2% in MO)
Dam Length780 ft
Dam TypeEarth
Max Storage165 acre-ft
Normal Storage165 acre-ft
Surface Area25 acres
Drainage Area4 sq mi
Max Discharge4,813 cfs
Year Completed1980 (46 years old)
NID IDMO20744

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: December 2, 2020
State Regulated: Yes
Regulatory Agency: Dam and Reservoir Safety Program

Ownership

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of South Fork Blackwater F-1?

South Fork Blackwater F-1 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 South Fork Blackwater F-1?

South Fork Blackwater F-1 is owned by information not available (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was South Fork Blackwater F-1 built?

South Fork Blackwater F-1 was completed in 1980, making it 46 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 South Fork Blackwater F-1?

South Fork Blackwater F-1 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 South Fork Blackwater F-1?

South Fork Blackwater F-1 has a dam height of 48 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 South Fork Blackwater F-1 last inspected?

South Fork Blackwater F-1 was last inspected on December 2, 2020. 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.