Great Stream Commons Lower

TR SUSQUEHANNA RIVER· Union, Pennsylvania· Built 2001· Earth· 24 ft tall
Low Hazard Flood Risk Reduction Private

Key Takeaway

Great Stream Commons Lower is classified as low hazard in Pennsylvania. It was completed in 2001 and is 25 years old. Its primary use is flood risk reduction.

Physical Details

Dam Height 24 ft (taller than 52.7% in PA)
Dam Length700 ft
Dam TypeEarth
Max Storage79 acre-ft
Normal Storage14 acre-ft
Surface Area2 acres
Drainage Area0 sq mi
Year Completed2001 (25 years old)
NID IDPA01699

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: No
Last Inspection: July 10, 2019
State Regulated: Yes
Regulatory Agency: Pennsylvania Department of Environmental Protection

Ownership

UNION COUNTY ECONOMIC DEVELOPMENT CORPORATION

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Great Stream Commons Lower?

Great Stream Commons Lower is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Great Stream Commons Lower?

Great Stream Commons Lower is owned by UNION COUNTY ECONOMIC DEVELOPMENT CORPORATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Great Stream Commons Lower built?

Great Stream Commons Lower was completed in 2001, making it 25 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 Great Stream Commons Lower?

Great Stream Commons Lower serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Great Stream Commons Lower?

Great Stream Commons Lower has a dam height of 24 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 Great Stream Commons Lower last inspected?

Great Stream Commons Lower was last inspected on July 10, 2019. 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.