A Letter of Map Revision (LOMR) is a letter from the Federal Emergency Management Agency (FEMA) confirming a completed project has been built to meet minimum National Flood Insurance Program (NFIP) standards for proposed hydrology changes. This in an official modification to an effective Flood Insurance Rate Map (FIRM). There are certain items required for the submittal of the LOMR to FEMA. These items include several hydraulic, structural, and general applications, a project narrative, hydraulic computations for both the existing and proposed conditions, digital models, a certified topographic work map with floodplain delineations, an annotated FIRM showing the revised area overlaid on the existing FIRM map, and notice letters to property owners within the revised floodplain area. A posting in a community newspaper is also sometimes required.