(W 106⁰19ʹ--W 106⁰13ʹ/N 39⁰16ʹ--N 39⁰13ʹ). Relief shown by contours and spot heights. "Surveyed in 1879. Railroads and some shafts added later." "George Otis Smith, Director"--upper left corner. 45 x 81 centimeters Scale 1:9,600 City Maps
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