Thunder Hollow

BULLRUN CREEK· Union, Tennessee· Built 1974· Earth·
Significant Hazard Private

Key Takeaway

Thunder Hollow is classified as significant hazard in Tennessee. It was completed in 1974 and is 52 years old. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Length357 ft
Dam TypeEarth
Max Storage34 acre-ft
Normal Storage25 acre-ft
Surface Area1 acres
Drainage Area0 sq mi
Year Completed1974 (52 years old)
NID IDTN17301

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: February 11, 2020
State Regulated: No

Ownership

SIMMERLY, MR. DANA

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Thunder Hollow?

Thunder Hollow 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 Thunder Hollow?

Thunder Hollow is owned by SIMMERLY, MR. DANA (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Thunder Hollow built?

Thunder Hollow was completed in 1974, making it 52 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

When was Thunder Hollow last inspected?

Thunder Hollow was last inspected on February 11, 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.