Loy Lake Dam

LOY CREEK· Grayson, Texas· Built 1933· Earth· 25 ft tall

High Hazard Recreation Local Government

Key Takeaway

Loy Lake Dam is classified as high hazard in Texas. It was completed in 1933 and is 93 years old. Its primary use is recreation. 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	25 ft (taller than 50.9% in TX)
Dam Length	748 ft
Dam Type	Earth
Max Storage	642 acre-ft
Normal Storage	370 acre-ft

Surface Area	42 acres
Drainage Area	2 sq mi
Max Discharge	14,053 cfs
Year Completed	1933 (93 years old)
NID ID	TX02053

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: January 10, 2018

State Regulated: Yes

Regulatory Agency: TCEQ

Ownership

GRAYSON COUNTY

Local Government

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Frequently Asked Questions

What is the hazard classification of Loy Lake Dam?

Loy Lake 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 Loy Lake Dam?

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

When was Loy Lake Dam built?

Loy Lake Dam was completed in 1933, making it 93 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 Loy Lake Dam?

Loy Lake Dam 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 Loy Lake Dam?

Loy Lake Dam has a dam height of 25 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 Loy Lake Dam last inspected?

Loy Lake Dam was last inspected on January 10, 2018. 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.