According to the United States Census Bureau , the city has a total area of 15.3 kmÂ ( 5.9 miÂ ) . 15.3 kmÂ ( 5.9 miÂ ) of it is land and 0.1 kmÂ ( 0.04 miÂ ) of it ( 0.34 % ) is water . According to the United States Census Bureau , the city has a total area of 5.9 square miles ( 15.3 kmÂ ) , of which , 5.9 square miles ( 15.3 kmÂ ) of it is land and 0.04 square miles ( 0.1 kmÂ ) of it ( 0.34 % ) is water .