Ladd's Mill is a concrete dam located in Washington County, Vermont, built in 1928. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 21 ft21 ft tall and 80 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 Ladd's Mill
The primary purpose of Ladd's Mill is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Worcester Hydro Company, Inc. (private). It impounds the North Branch Winooski River near Worcester.
The dam stands 21 feet tall and stretches 80 feet across, creates a reservoir covering 9 acres, has a storage capacity of 68 acre-feet, and collects water from a drainage area of 47 square miles. Completed in 1928, the structure is well-established, with more than 75 years of service.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/30/2019.
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Location
| State | Vermont |
| County | Washington |
| Nearest City | Worcester |
| River/Stream | North Branch Winooski River |
| Coordinates | 44.37250, -72.54530 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 80 ft |
| Year Completed | 1928 (98 years old) |
Storage & Hydraulics
| NID Storage | 68 acre-ft |
| Normal Storage | 68 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 47 sq mi |
| Max Discharge | 800 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Worcester Hydro Company, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/30/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | VT00170 |
| Federal ID | VT00170 |
| More Info | State Dam Safety Program |