SAN JUAN, Puerto Rico – Inside a small concrete pump station by the side of a freeway, a Quality Assurance team from the U.S. Army Corps of Engineers and a crew of government contractors labor over a large orange generator. The station is part of a complex flood control system that helps keep San Juan and neighboring towns dry. It is just one of hundreds of sites Corps teams are visiting as part of a unique mission to repair local generators and keep critical infrastructure functioning in the aftermath of Hurricane Maria.