Original: According to the United States Census Bureau , the city has a total area of 18.5 square miles ( 48.0 km ² ) , of which , 16.7 square miles ( 43.3 km ² ) of it is land and 1.8 square miles ( 4.7 km ² ) of it ( 9.77 % ) is water .
Simplified: According to the United States Census Bureau , the city has a total size of 48.0 km ² ( 18.5 mi ² ) . 43.3 km ² ( 16.7 mi ² ) of it is land and 4.7 km ² ( 1.8 mi ² ) of it is water .