Frank E. Heller Dam
The 928th tallest dam in the world
The Frank E. Heller Dam is an embankment dam that impounds Hagerman's Run and creates the Hagerman Reservoir that supplies water for Lycoming County, Pennsylvania. It is owned by the Williamsport Municipal Water Authority and Pennsylvania-American Water Company. Opened in 1975 it is located in Armstrong Township in southern Lycoming County.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).