Is Union City Dam broken? The dry bed reservoir functions just right
Union City Dam’s pool during a high-water event in Saegertown, Pennsylvania, May 2023. Union City Dam was built in 1971 and is the only “dry” dam among the sixteen flood-control reservoirs operated by the Pittsburgh District, meaning it does not maintain a permanent pool. The dam is self-regulated and does not require staff to operate machinery from a control tower – the dam releases water via a conduit invert and if the pool level eclipses a set elevation, water is automatically released through the dam’s spillway crest. (U.S. Army Corps of Engineers photo by Ryan Hill)

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Photo by: Ryan Hill |  VIRIN: 230615-A-XW512-1001.JPG