WSP12655

• File Number: 8220.101.10.B
• Description: Colorado River - Water Projects - Glen Canyon Dam-Lake Powell - Glen Canyon TWG
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 10/1/2004
• Author: Schmidt - Topping - Grams - Hazel
• Title: System-Wide Changes in the Distribution of Fine Sediment in the Colorado River Corridor Between Glen Canyon Dam and Bright Angel Creek - Arizona - Final Report - 10-01-04
• Water Supply Pro - Doc Type: Report/Study

B.

002334

Figure 16. Graphs showing bed elevation at the Lees Ferry gage. A. Time series of minimum bed elevation for the
Upper Cableway between 1921 and 1966. Also plotted are Bureau of Reclamation and GCMRC surveys of cross-
section R-1, which is the same location as the Upper Cableway, between 1956 and 2000. B. Time series of minimum
bed elevation for the Lower Cableway between 1929 and 1957. Figure from Grams et al. (2004, fig. 12, 13).

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water surface elevations
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minimum bed elevations
(Range 1 surveys)

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of
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minimum bed elevations (discharge measurements)

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cable-gage hI. measured
cable-gage hI. calculated

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1/1/21

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DATE

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water surface elevation
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water surface elevations (discharge measurements)

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g

e

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minimum bed elevation
(GCMRC survey)

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minimum bed elevations (discharge measurements)

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1/1/21

: I Ill: I II II I I I I I. I II I I1II I. I II II II I I. II 1'1. II I. I.... I.

. I. I; I.. I: I III I

1/1/31

1/1/41

1/1/51

1/1/61
DATE

1/1/71

1/1/81

1/1/91

1/1/01

26 System-wide Changes in the Distribution of Fine Sediment in the Colorado River Corridor ...