1 map : col. ; 115 x 93 cm., folded in envelope 30 x 24 cm.; An overprint of the 1:500,000-scale state base map. Shows counties, location and names of all cities and towns and most of the smaller settlements, railroads, and township and range lines in black; water features in blue; hydrologic boundaries and codes in red; county codes in green. No contours. Sheet 42 by 58 inches. 1959 base.