Stp Main Cooling Reservoir Dam

OFF CH-COLORADO RIVER· Matagorda, Texas· Built 1981· Earth· 46 ft tall
High Hazard Other Private

Key Takeaway

Stp Main Cooling Reservoir Dam is classified as high hazard in Texas. It was completed in 1981 and is 45 years old. 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 46 ft (taller than 90.9% in TX)
Dam Length65,505 ft
Dam TypeEarth
Max Storage250.0K acre-ft
Normal Storage202.7K acre-ft
Surface Area7,000 acres
Drainage Area11 sq mi
Max Discharge4,200 cfs
Year Completed1981 (45 years old)
NID IDTX05792

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: Yes
Last Inspection: September 27, 2011
State Regulated: Yes
Regulatory Agency: TCEQ

Ownership

STP NOC

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Stp Main Cooling Reservoir Dam?

Stp Main Cooling Reservoir Dam 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 Stp Main Cooling Reservoir Dam?

Stp Main Cooling Reservoir Dam is owned by STP NOC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Stp Main Cooling Reservoir Dam built?

Stp Main Cooling Reservoir Dam was completed in 1981, making it 45 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 Stp Main Cooling Reservoir Dam?

Stp Main Cooling Reservoir Dam 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 Stp Main Cooling Reservoir Dam?

Stp Main Cooling Reservoir Dam has a dam height of 46 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 Stp Main Cooling Reservoir Dam last inspected?

Stp Main Cooling Reservoir Dam was last inspected on September 27, 2011. 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.