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-5- . 9. "continued" one to four feet lower than their elevations. This difference might be accounted for. due to the fact that there is heavy vegetation in this area. 10. Battlement Mesa ASI's photography was taken when the leaves were off of the trees. If Nichol's photography had a lot of leaves on it, it would have made the ground difficult to see. Horizontally, the grids did not match. The same grid system was used on this project and the Roan Creek (Getty Oi 1) mappi ng done by Inter- mountain Technical Services. We had a~X of apprDx. - 470 feet, and a ~Y of -165 feet. C.V.I. used the same control point to tie into this project as they did in the Roan Creek (Getty Oil) project. C.V.I. came up with.a ~X= -471.44 feet,~Y=-171.50 feet andll.Z=+0.09 feet. The differences in the coordinates for control point DHY-13 were due to the fact that C.V.I.'s coordinates were based on sea level, while Nichol's coordinates are based on a modified horizontal grid system. This mapping was compiled by Gingery and Associates at a scale of1 "=50' and a 2 foot contour interval. . Vertically the maps seemed to tie to within 1 one foot. Since the two projects were plotted at different scales, the elevations had to be interpolated at specific points of detail tD see how the maps compared. Horizontally, the two projects had a shift in the grid systems. ASI came up with a ll.X of approximately -7 feet and a ~ of approximately +37 feet. . C.V.I. used the horizontal grid system that was used in the Parachute area. C.V.I. couldn't recover any of the control points that were used in the previous mapping. . Vertically C.V.I. tied into point 7t. C.V.I.'s elevation was 5107.14' while Western States elevation was 5107.51'. John Love1ette wasn't sure if Western State surveyed the re-bar or the ground.