A Letter of Map Change is an official FEMA determination, by letter, to amend or revise effective Flood Insurance Rate Maps, Flood Boundary and Floodway Maps, and Flood Insurance Studies. LOMC's are broken down into the following categories
Ohio Floodplain Management Handbook (A Resource Handbook for Local Officials to Administer Flood Damage Reduction Regulations), Acronyms and Definitions Provided To Familiarize The Reader With Some Common Terms Used In Floodplain Management, OH, USA (Rev.) 2005. http://www.dnr.state.oh.us/Portals/7/floodpln/oh_f loodplain_handbook.pdf, (ND/ Flood - Amer) {453}