1 map : col. ; 84 x 124 cm. fold. 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 and railroads in black; water features in blue; hydrologic boundaries and codes in red; county codes in green. No contours. Sheet 35 by 51 inches. 1971 base.