Stj04

INTERCOASTAL WATERWAY· St. Johns, Florida· Earth· 21 ft tall
High Hazard Other Local Government

Key Takeaway

Stj04 is classified as high hazard in Florida. Its primary use is other. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.

Physical Details

Dam Height 21 ft (taller than 56.2% in FL)
Dam Length9,514 ft
Dam TypeEarth
Max Storage4.8K acre-ft
Normal Storage1.7K acre-ft
Surface Area202 acres
NID IDFL70001

Safety Information

High Hazard

Loss of human life is likely if the dam fails.

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: SJRWMD

Ownership

FLORIDA INLAND NAVIGATION DISTRICT

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Stj04?

Stj04 is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Stj04?

Stj04 is owned by FLORIDA INLAND NAVIGATION DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Stj04?

Stj04 serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Stj04?

Stj04 has a dam height of 21 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.