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c, " .j ,), ;".) Figure B3-Continued. The Number 4 Gage and the high.waters mark from the 1921 flood, IG) October 2. 1921. view of the vertlCallow.water section of the Number 4 Gage on the rock. High-water marks from June 1921 flood are visible on the right bank. September 20, 1922 October 10- December 16, 1922 January 19, 1923 September I, 1923 September 22, 1923 April 1924 April 17, 1924 June!, 1924 . August 26-27, 1924 ~ , Last regular stage measurement made at the Number 4 Gage at 7:20 a.m, The concrete gagehouse and stilling well for the penn anent Lees Feny Gage were built immediately downstream from the Dugway Gage, The new Lees Ferry Gage and the Dugway Gage both have the same datum, An Au-fuzee continuous water-stage recorder was installed, USGS takes over full control of the Lees Feny gaging station from the Southern California Edison Company. Last stage measurement made at the Number 4 Gage. Inclined slope gage installed on the left bank at the Upper Cableway. This gage was known as the "Cable Gage." Gage read from 13,5 ft to 34 ft (fig. B5). Gage was used to help constrain the change in stage during discharge measurements at the Upper Cableway (which was I mile upstream from the recorder gage), Gage was tied into a benchmark near the Number 4 Gage on April 24, 1924, The OIiginal datum of the Cable Gage was 3,109.40 ft above the NGVDI929. Inclined upper section of the Number I Gage replaced. New inclined upper section of the Number I Gage tied into the old Southern California Edison Company benchmark. New vertical low-water section installed about 20 ft offshore from the new inclined upper section of the Number I Gage. This new vertical section was anchored to the offshore side of a large rock, and was tied in with a rod and level to the datum of the Number I Gage. 02214 Appendix B 75