According to the United States Census Bureau , the city has a total area of 55.8 square miles ( 145 km2 ) , of which , 55.7 square miles ( 144 km2 ) of it is land and 0.1 square miles ( 0.26 km2 ) of it ( 0.13 % ) is water .
According to the United States Census Bureau , the city has a total area of 55.8 square miles ( 144.4 km ² ) , of which , 55.7 square miles ( 144.2 km ² ) of it is land and 0.1 square miles ( 0.2 km ² ) of it ( 0.13 % ) is water .