According to the United States Census Bureau , the city has a total area of 45.0 square miles ( 116.6 kmÂ ) , of which , 44.1 square miles ( 114.1 kmÂ ) of it is land and 0.9 square miles ( 2.4 kmÂ ) of it ( 2.07 % ) is water . According to the United States Census Bureau , the city has a total area of 45.0 square miles ( 116.6 kmÂ ) of which 44.1 square miles ( 114.1 kmÂ ) is land and 0.9 square miles ( 2.4 kmÂ ) ( 2.07 % ) is water .