Highland Lower Reservoir Dam is a concrete dam located in Ulster County, New York, built in 1916. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 12 ft12 ft tall and 200 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Highland Lower Reservoir Dam
The primary purpose of Highland Lower Reservoir Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Town of Lloyd Highland Water District (local government). It impounds the Tr-twaalfskill near Highland.
The dam stands 12 feet tall and stretches 200 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 98 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1916, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 07/13/2022.
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Location
| State | New York |
| County | Ulster |
| Nearest City | Highland |
| River/Stream | Tr-twaalfskill |
| Coordinates | 41.72472, -73.97944 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 200 ft |
| Year Completed | 1916 (110 years old) |
Storage & Hydraulics
| NID Storage | 98 acre-ft |
| Max Storage | 98 acre-ft |
| Normal Storage | 82 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 875 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Town of Lloyd Highland Water District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 07/13/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00882 |
| Federal ID | NY00882 |
| More Info | State Dam Safety Program |