Highland Lower Reservoir Dam

TR-TWAALFSKILL· Ulster, New York· Built 1916· Concrete· 12 ft tall
Significant Hazard Water Supply Local Government

Key Takeaway

Highland Lower Reservoir Dam is classified as significant hazard in New York. It was completed in 1916 and is 110 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 12 ft (taller than 23.2% in NY)
Dam Length200 ft
Dam TypeConcrete
Max Storage99 acre-ft
Normal Storage82 acre-ft
Surface Area6 acres
Drainage Area0 sq mi
Max Discharge875 cfs
Year Completed1916 (110 years old)
NID IDNY00882

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: Yes
Last Inspection: January 11, 2017
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

TOWN OF LLOYD HIGHLAND WATER DISTRICT

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Highland Lower Reservoir Dam?

Highland Lower Reservoir Dam 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 Highland Lower Reservoir Dam?

Highland Lower Reservoir Dam is owned by TOWN OF LLOYD HIGHLAND WATER DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Highland Lower Reservoir Dam built?

Highland Lower Reservoir Dam was completed in 1916, making it 110 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 Highland Lower Reservoir Dam?

Highland Lower Reservoir Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Highland Lower Reservoir Dam?

Highland Lower Reservoir Dam has a dam height of 12 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 Highland Lower Reservoir Dam last inspected?

Highland Lower Reservoir Dam was last inspected on January 11, 2017. 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.