According to the United States Census Bureau , the city has a total area of 7.7 square miles ( 20 km2 ) , of which , 7.6 square miles ( 20 km2 ) of it is land and 0.1 square miles ( 0.26 km2 ) of it ( 1.56 % ) is water .
According to the United States Census Bureau , the city has a total area of 7.7 square miles ( 19.9 km ² ) , of which , 7.6 square miles ( 19.6 km ² ) of it is land and 0.1 square miles ( 0.3 km ² ) of it ( 1.56 % ) is water .