ROCK ISLAND, Illinois - The U.S. Army Corps of Engineers, Rock Island District, reminds everyone that possession of explosives or explosive devices of any kind, including fireworks and other pyrotechnics, on U.S. Army Corps of Engineers property is prohibited. This prohibition applies to all recreation areas at Saylorville Lake, Lake Red Rock and Coralville Lake as well as Corps of Engineers locations along the Illinois Waterway and Mississippi River.