Jeannette (Mountain Valley Lake) is a private water resource nestled in the picturesque Hempfield Township of Westmoreland, Pennsylvania. This earth dam, completed in 1889, stands at a height of 36 feet and spans 480 feet in length, providing a serene setting for recreational activities. The lake has a storage capacity of 300 acre-feet, with a normal storage level of 230 acre-feet and a surface area of 9 acres, making it an ideal spot for water and climate enthusiasts to explore.

Managed by the Pennsylvania Department of Environmental Protection, Jeannette (Mountain Valley Lake) is regulated and inspected regularly to ensure its safety and functionality. With a significant hazard potential and a fair condition assessment, the dam poses a moderate risk that is mitigated through risk management measures. The lake's spillway, with a width of 8 feet, is uncontrolled, adding to the natural beauty and charm of this recreational reservoir. Its waters are sourced from TR BRUSH CREEK and offer opportunities for outdoor activities in a tranquil environment.

The dam at Jeannette (Mountain Valley Lake) has undergone modifications in 2007 to enhance its hydraulic and structural integrity. With a designated inspection frequency and emergency action plan readiness, the dam is well-prepared to handle any potential risks. The picturesque location, combined with the recreational opportunities it offers, makes Jeannette a must-visit destination for water resource and climate enthusiasts seeking a peaceful retreat in the heart of Pennsylvania's beautiful countryside.