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Show Record sand bars continually through that trip. These crossing 185 bars can be called shoals, where the depth runs from one inch to half a foot. Generally it is a gentle, slow moving stream, with a velocity of two or three miles an hour. You can make upstream progress with effort by rowing and night thus make a mile or two an hour. Except here and there the channel is in no sense permanent. Nearly always in going around a curve the outer edge of the flood channel would abut against the rocky slope or wall; in one sense that would be permanent; " I mean that would be a fixed, per-manent place." A far greater percentage of the mileage is against earth banks, the bars really, and the benches which have been formed 186 there and are now changing. I would say that it would be impossible for any length of time to maintain a permanent channel by dredging. In many places the bed is just soft silt. When stuck on a sand bar it is very hard to use an oar, although some of the bars are of harder, more compact sand. The bottom is so soft that by moving around in the boat the current would strike it and the 188 boat gradually worm its way off. Photograph No. 42 in Exhibit 76 shows one of these bars; the edge is constantly being cut and swept 189 into the river and any small rise will wash the top of it. The crossing bars are known to change, caused by washing away of their sand and soil, carrying them downstream to a point where the river becomes straight and deposits the sand and soil. The conditions shown on Plate 33- A is typical of numerous places between the mouth 190 of the San Rafael and the mouth of the Green River. The different bars are all mentioned and given a name in my report and their lo-cation is shown on the large exhibits of which Plate 30 is typical. 191 On September 27, 1928, there was a flood, and on page 7 of my report I indicate that the mean flow was on that date 2830 second feet in the Green River; on September 28, it was 4000 second feet; during that night, the flood reached a stage of 6000 second feet at 4 A. M.; on October 4 there was a flood which reached the stage of 16,400 second feet; and on October 15 a peak of 16,000; on October 31 there |
