Windsor Minerals Pond #9, also known as Cwm Tailings Pond #9, is a private-owned earth dam located in West Windsor, Vermont. Built in 1972 by SOILS ENGINEERING, this tailings pond stands at a height of 40 feet and spans a length of 1620 feet, with a storage capacity of 48 acre-feet. The primary purpose of this structure is for tailings storage, serving as a containment area for waste materials from mining operations.

The dam is regulated and inspected by the Vermont Department of Environmental Conservation (DEC) to ensure its safety and compliance with state regulations. With a low hazard potential and a satisfactory condition assessment, Windsor Minerals Pond #9 poses minimal risk to surrounding areas. The last inspection took place in 2009, with a scheduled inspection frequency of every 10 years. The dam's emergency action plan status and risk assessment information are currently unavailable.

As a vital component of the Mill Brook-TR watershed, the management and upkeep of Windsor Minerals Pond #9 are crucial for maintaining water resources and mitigating potential environmental impacts. Climate and water resource enthusiasts would be interested in the structural details and regulatory oversight of this earth dam, which plays a significant role in preserving the ecological balance of the region.