Davis Island Lock and Dam Site
 The Davis Island Lock and Dam Site in Avalon Pennsylvania is the site of the former Davis Island lock that was completed in 1885. The lock and dam existed from 1878 to 1922 designed by William Emery Merrill and the U.S. Army Corps of Engineers. The Davis Island Lock and Dam was the first dam that was constructed on the Ohio River. It officially opened on October 7 1885 with a large dedication ceremony.