Floodplain Information

Helpful links for information regarding living in or near a floodplain

Wisconsin DNR Living in a Flood Plain and Letter of Map Amendment Information

Ozaukee County Flood Plain Insurance Study and Floodplain map index

FEMA Letter of Map Amendment & Letter of Map Revision-Based on Fill Process

A LOMA (Letter Of Map Amendment) is typically a correction to a flood map and is issued based on better survey data showing that a property’s natural lowest grade is above BFE (base flood elevation). A property owner will often request a LOMA after being informed by a lending institution that the property is believed to be within a SFHA (special flood hazard area). FEMA does not charge a fee for reviewing applications for a LOMA. 

Thiensville Interactive Map

WIDNR Flood Prevention Steps