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Show 89 -- 85-- " A That flood hit us during the afternoon, as I remember it, without looking at my diary; and we were surveying the bar at Mile 80.5 and had camped at the lower end. We did not complete the survey of the bar that night, and the next morning a very large portion of the bar was submerged, and I have had to show on that Plate, No. 31. [ Complainant's Exhibit No. 76] by dots, where the bar was the afternoon before the flood. " Q Mr. Hoyt, how is silt measured in a river? How do you determine the amount of silt in a river? " A The amount of silt is measured by taking samples of the water, and either one of two methods can be used, one termed the volume method, where the silt is allowed to settle in a can and you determine the volume; or it can be determined by weight, the per cent by weight, which is now the practice in the Survey, to determine the silt by weight." R. 192- 193. You get different quantities of silt at certain depths in the river, and the " more recent observations are so made that the attempt to determine the average silt content, day by day, is in per cent of weight." R. 193 The calculations in his report, Complainant's Exhibit No. 75, of the amount of silt carried annually in the Green River are based on scientific investigation from measurements made at Greenriver. R. 193. " Q As I understand it, this silt in the river may come away upstream from its tributaries? " A The mount of silt that I show here on page 78 of my report, Bulletin No. 76, of the Department of |