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extensive water development. Platt maps were transferred onto published 1 :24000 Geological Survey topographic maps, using a stereo zoom transfer scope. Aerial photography of the Uinta Basin was taken on September 7, 1936, and photos at a scale of 1:1100 we-e obtained from the U.S. National Archives in Washington. D.C. The trace of the channel at the time of these photos was also transferred to topographic base maps using a stereo zoom transfer scope. Planform changes were compared. Comparison of channel widths between the original putt surveys and the present-day were made by remeasuring channel widths near the original measurement points. Original surveys were conducted along east-west and north-south section and quarter section lines. The distance from a particular section corner to the banks of the river were measured in units of "chains". The width of the channel was calculated by subtracting the distance between the section corner and one bank from the distance to the other bank; distances were converted to meters. Measurement locations were marked on the platt maps. Section lines typically crossed the channel obliquely, and true channel widths were determined by trigonometric correction for the angle at which section lines cross the channel, as determined on the original Platt maps (Fig. 6). Locations of the river channel were noted as "right bank" or "left bank", but the definition of the term "bank" was not described. At two original survey lines the edges of water were identified in addition to the bank in the field notes. Thus, the bank is a different geomorphic feature than the water's edge. Several measurements were made of different geomorphic features because of uncertainty in the definition of bank used by the original surveyors. The geomorphic features measured were the water surface width, low elevation inner bank, high flood debris, and top of high bank (Fig. 7). The low elevation inner bank was identified as the 19