Blair Gap, located in Juniata Township, Blair County, Pennsylvania, is a gravity dam completed in 1907 for water supply purposes. The dam, standing at a height of 47 feet and spanning 316 feet in length, holds a storage capacity of 100 acre-feet with a normal storage level of 92 acre-feet. Situated on Blair Gap Run, the dam serves as a crucial water resource for the surrounding area, with a fair condition assessment and a high hazard potential.

Managed by the Pennsylvania Department of Environmental Protection, Blair Gap is subject to state regulations for inspection, enforcement, and permitting. Despite its age, the dam has been maintained and inspected regularly, with the last inspection taking place in May 2020. While the dam's condition is deemed fair, it is essential for water resource and climate enthusiasts to monitor its risk potential and management measures to ensure the safety and sustainability of the surrounding community's water supply infrastructure.

With its historical significance and vital role in water supply management, Blair Gap serves as a focal point for understanding the intersection of water resources, climate resilience, and infrastructure maintenance. As a gravity dam with a buttress core type, it exemplifies the engineering ingenuity of its time and the ongoing responsibility of modern agencies to uphold safety standards and risk assessments for critical water infrastructure in the face of changing climate conditions.