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<br />c, <br /> <br />o <br />o <br />"'- <br />"' <br />'" <br />r-- <br /> <br />o <br />o <br />o <br />'" <br />Q) <br />r-- <br /> <br />o <br />o <br />"' <br />'" <br />Q) <br />r-- <br /> <br />EASTING, IN FEET <br />0 0 0 0 0 0 <br />0 0 0 0 0 0 <br />0 "' 0 "' 0 "' <br />,..: ,..: '" '" oi oi <br />Q) Q) Q) Q) Q) Q) <br />r-- r-- r-- r-- r-- r-- <br /> <br /> <br /> <br />MODERN PAVED ROAD, <br />2,135,500 PARKING LOT, <br />AND BOAT RAMP <br /> <br />USGS HYDROGRAPHER'S <br />HOUSE, OFFICE, AND SEDIMENT LAB <br /> <br />2,135,000 <br /> <br /> <br />LOWER CABLEWAY <br /> <br />/ <br /> <br /> 2,134,500 <br /> :;; MODERN CABLEWAY <br />I- <br />w .....15 -M. <br />w <br />LL 2,134,000 ~4 ..-........ ........... <br />;:::: z ...... <br />(9 ;: v - <br />;:::: 0 <br />I 2,133,500 0 <br />I- <br />a: <br />0 <br />z <br /> 2,133,000 <br /> <br />2,132,500 <br /> <br />o <br />I <br />o <br /> <br />500 FEET <br />I I <br />200 METERS <br /> <br />UPPER CABLEWAY- <br /> <br /> <br />2,132,000 <br /> <br /> <br />Base modjfied from 1:2,400 scale topographic maps, <br />Bureau of Reclamation (1990). Projection is 1983 Arizona Slate <br />Plane, central zone. <br /> <br />EXPLANATION <br /> <br />3,150-FOOT ELEVATION CONTOUR <br />EDGE OF COLORADO RIVER AT DISCHARGE <br />OF 5,000 CUBIC FEET PER SECOND <br />PEAK 1921 FLOOD EDGE OF WATER <br />PEAK 1884 FLOOD EOGE OF WATER <br />LEES FERRY GAGE <br /> <br />HISTORICAL STAFF GAGES <br />o NUMBER 1 GAGE (inclined section) <br />. NUMBER 1 GAGE (vertical section) <br />. NUMBER 2 GAGE <br />. NUMBER 3 GAGE and <br />NUMBER 4 GAGE (inclined section) <br />o NUMBER 4 GAGE (vertical section on rock) <br />AI. DUGWAY GAGE <br /><> CABLE GAGE <br /> <br />. <br />022'48 <br /> <br />AI. <br /> <br />Figure 1-Cont;nued. The Colorado River drainage basin and lees Ferry. ((.1 The Lees Ferry reach showing the lees Ferry Gage, the <br />six historical staff gages (Number 1 Gage, Number 2 Gage. Number 3 Gage. Number 4 Gage. Dugway Gage. and Cable Gagel. and the <br />extent of inundation at 5,000 cubic feet per second and during the 1921 and 1884 floods Extent of inundation dunng the peak of the <br />June 1921 flood is based on the peak stage of this flood at the Number 1. Dugway, and Number 4 staff gages and topography <br />surveyed in 1990, Extent of inundation during the peak of the July 1884 flood is based on the assumption that the water surface was <br />essentially flat upstream from the Lees Ferry Gage (as justified based on fig, 4A), <br /> <br />Introduction 5 <br />