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Show Record or less carefully the general character of the river, with a view to the possibility of traveling on it by row boat and canoe. It seemed to me that it would be practicable to travel down the river 4061 in that stretch that way. I did not see any boats on the river. There are no instructions to the topographic engineers to show rapids on their maps by conventional symbol; and there is no conventional definition in the department as to what is or is not a rapid that I know of. 4062 In connection with the proposed dams on the Colorado, Green and San Juan Rivers, the question of sediment in the water is given more or less casual consideration, and attempts have been made from time to time to determine the amount of the sediment at quite a number of points. The earliest attempts of that kind, I think, were made in 1905 or 1906, and more recently a rather comprehensive series of measurements have been made at a number of 4063 points. Where a dam is built across a river carrying thousands of tons of sediment, the greater part of it will be dropped out, normally, in the upper part of the hand waters of the dam and will then gradually fill down toward the dam itself, and eventually the reservoir capacity will be very materially decreased by reason of the deposits of sediment. 4064 Exhibit 9 is a map two parts. One portion is a plan from Less Ferry up stream to Grand Junction, covering the Green from its mouth to Green River, Wyoming, and the San Juan from its mouth up to 10 or 12 miles above Goodridge, to Chinle Creek. The mileage above Lees Ferry seems to be indicated on all three streams. The power site reserves are shown. The power site classifications, reservoir site withdrawals and projects for which application has been made to the Federal Power Commission are shown. The second portion of this map contains a profile showing the slope of the Colorado River, the Green and San Juan Rivers. |