Elmslie is a privately owned earth dam located in Calais, Vermont, along the picturesque Pekin Brook. Built in 1989 by the Johnson Company, this dam stands at a height of 25 feet and has a maximum storage capacity of 46 acre-feet. With a primary purpose of recreation, Elmslie offers a surface area of 4 acres for outdoor enthusiasts to enjoy.

Despite being primarily used for recreation, Elmslie poses a significant hazard potential and has been assessed to be in fair condition as of July 2017. The dam is regulated by the Vermont Department of Environmental Conservation and undergoes regular inspections every three years to ensure its structural integrity. While there are no outlet gates or spillway type specified, Elmslie remains a key feature in the local landscape, providing both aesthetic and functional benefits to the community.

As an integral part of the water resource management system in Washington County, Vermont, Elmslie serves as a vital structure for flood control and water storage. With its stone core and soil foundation, this dam plays a crucial role in maintaining the ecological balance of Pekin Brook and its surrounding areas. Despite its age, Elmslie continues to be a valuable asset for both residents and visitors alike, showcasing the intersection of human ingenuity and environmental stewardship in the face of a changing climate.