| OCR Text |
Show 781 elevation, run by spirit level lines, and are carried from the basic lines by means of vertical angles. R. 1864. The contour lines on the map are lines supposed to repre-sent equal elevations above sea level, and are as correct as it is possible to determine them. Enough elevations are determined throughout the ares to enable a man to sketch those contours as near as he can depend on the scale of the map. All of the measurements that appear on the map are determined by scientific instruments, and barring a probable error which exists every place, are correct. [ Attention directed to Exhibit No. 10, Sheet A]. The blue line on the map represents the edge of the stream at the time the survey was made. R. 1865. Its width and shape is determined by scientific instruments. The straight brown lines inside of the blue lines indicate five foot contours, which between lines show a five foot fall in the river. The circles, enclosing numbers, indicate the mileage above Lees Ferry, along the center line of the stream. R. 1866. " BY THE SPECIAL MASTER: " Q. That is ascertained by traverse? " A. Yes; we make the map, then we simply step off a miles, and two miles, and so forth, and simply draw this out so we can correlate the profile of the stream with the plan of the river. " BY MR. BLACKMAR: " Q. I notice at Lees Ferry are the letters " B. M.", after that, " 3148". What does that mean? |
