Hagerstown, Md. -- Chesapeake & Ohio Canal National Historical Park has begun repairing Lockhouse 7 in Glen Echo (mile 7) and Lockhouse 11 (mile 8.79) in the Seven Locks area. The repairs will be completed by approximately the end of September. Visitors are asked to obey all construction warning signs and barricades. The repair work is being done as part of a lockhouse preservation project funded by the Save Americas Treasures Grant Program. The program is administered by the National Park Service in partnership with the National Endowment for the Arts, the National Endowment for the Humanities, the Institute of Museum and Library Services and the President's Committee on the Arts and the Humanities. Chesapeake & Ohio Canal National Historical Park is one of three national parks to receive a Save Americas Treasures Grant in 2004.