Loch Alsh Reservoir, located in Montgomery, Pennsylvania, is a picturesque water resource managed by the local government for recreational purposes. Built in 1915, this earth dam structure stands at a height of 16 feet and has a storage capacity of 41 acre-feet. With a surface area of 6 acres and a drainage area of 0.25 square miles, the reservoir is a popular spot for outdoor enthusiasts to enjoy water-based activities.

Under the jurisdiction of the Pennsylvania Department of Environmental Protection, Loch Alsh Reservoir is regularly inspected and regulated to ensure its safety and functionality. The dam has a high hazard potential but has been assessed as satisfactory in condition, with the last inspection conducted in November 2020. While no emergency action plan (EAP) has been reported, the reservoir meets regulatory guidelines and continues to be a valuable water resource for the community.

Surrounded by the tranquility of Upper Dublin Township and fed by the Wissahickon Creek, Loch Alsh Reservoir remains a vital part of the local landscape. Its historical significance, combined with its recreational value, makes it a cherished destination for water resource and climate enthusiasts seeking to connect with nature and appreciate the beauty of Pennsylvania's diverse water ecosystems.