\ ./ I • • \ DEPART MEN T OF THE INTERIOR ALBERT 8 FA LL. SECRETARY U. S. GEOLOGICAL SURVEY GEORGE OTIS SMITH , DIRECTO R • .. ) C. H. B1rd seye, Chiel Top9graphic Engmeer T. G. Gerd ne, Oi v'V 'O" To pograph1c Engineer Topography by K. W. T rll\1b le Surveyed 1n I 21 SURVEVEO I N CQOPE.RATION W ITH TH E SOUTHE RN C AUFY RNIA EDISON COMPAN Y • PLAN AND COLORADO RIVER, LEES FERRY . ARI SAN JUAN RIVER. MOUTH TO CHINLE C 0 GR EEN R IV ER: UTAH ; AND CERTAI N TR I BUTAR I ES APPROXIMATE MEAN DECLINAT ION 1921 ' KEY MAP OF PLAN SHEE TS Subject to adj ustment • SHEET 0 • .. 22 SHEETS (16 plans. 6 profdes ) Printed 1922