Military Ocean Terminal Concord (MOTCO) proposes to substantially expand its storage area for munitions and explosives. As a result of the modernization, it may be necessary to update, reconfigure, realign, and/or remove an unknown number of existing railroad lines that access the Rail Barricaded Sidings (RBS). Of the 38 RBS at the installation, MOTCO is proposing to remove up to seven, abandon-in-place or possibly demolish an additional 24, and retain seven.