Simmons Lake

CYPRESS CREEK· Hillsborough, Florida· Earth· 10 ft tall
Significant Hazard Recreation Local Government

Key Takeaway

Simmons Lake is classified as significant hazard in Florida. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 10 ft (taller than 13.4% in FL)
Dam Length95 ft
Dam TypeEarth
Max Storage119 acre-ft
Normal Storage58 acre-ft
Surface Area25 acres
NID IDFL12040

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: March 31, 2016
State Regulated: Yes
Regulatory Agency: FDEP

Ownership

HILLSBOROUGH COUNTY

Local Government

Nearby Dams

Middle Lake Dam

Hillsborough, FL

Significant Hazard 12 ft

North Lake Dam

Hillsborough, FL

Significant Hazard 9 ft

Manatee Cooling Water Reservoir

Manatee, FL

High Hazard 79 ft

Fgh1b Fort Green Mine

Manatee, FL

Significant Hazard 35 ft

Unnamed Dam

Hillsborough, FL

Low Hazard 13 ft

Hil7

Hillsborough, FL

Unknown 13 ft

32acre Cooling Pond

Hillsborough, FL

Low Hazard 11 ft

Hil8

Hillsborough, FL

Unknown 44 ft

Frequently Asked Questions

What is the hazard classification of Simmons Lake?

Simmons Lake 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 Simmons Lake?

Simmons Lake is owned by HILLSBOROUGH COUNTY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Simmons Lake?

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

How tall is Simmons Lake?

Simmons Lake has a dam height of 10 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 Simmons Lake last inspected?

Simmons Lake was last inspected on March 31, 2016. 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.