Windsor Minerals Pond #9
Windsor Minerals Pond #9 is an earth dam located in Windsor County, Vermont, built in 1972. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Windsor Minerals Pond #9
The primary purpose of Windsor Minerals Pond #9 is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Imerys Talc (private). It impounds the Mill Brook-tr near West Windsor.
The dam stands 40 feet tall and stretches 1,620 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 48 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1972, the structure is well into its service life at over 50 years 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/09/2009. That was over 16 years ago.
At 40 feet, this dam is taller than 87% of dams nationwide.
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Location
| State | Vermont |
| County | Windsor |
| Nearest City | West Windsor |
| River/Stream | Mill Brook-tr |
| Coordinates | 43.46245, -72.52855 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 1,620 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 48 acre-ft |
| Max Storage | 48 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Tailings |
| Owner | IMERYS TALC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/09/2009 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | VT00335 |
| Federal ID | VT00335 |
| More Info | State Dam Safety Program |