Lamson Dike is an earth dam located in Orange County, New York, built in 1925. It carries a Low hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 190 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lamson Dike
The primary purpose of Lamson Dike 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 City of Middletown (local government). It impounds the Shawangunk Lake.
The dam stands 9 feet tall and stretches 190 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 51 acre-feet. Completed in 1925, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 11/01/2023.
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Location
| State | New York |
| County | Orange |
| Nearest City | None |
| River/Stream | Shawangunk Lake |
| Coordinates | 41.43833, -74.51278 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 190 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 34 acre-ft |
| Surface Area | 4 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Middletown |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/01/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY00600 |
| Federal ID | NY00600 |
| More Info | State Dam Safety Program |