Show WIN IN lei IN fill lei IM IN isola lei isola M lot IN issow IN 1 PANORAMIC MINE SKETCHING i prof arthur lakes in mines and minerals 1011 a lei lei lei 11 1 1 N IGO lei lot lei lei lot IM lei to lot 1011 1 IN IN isola 14 4 in drawing a panoramic view and section of a country through which a ion long I 1 crosscut tunnel is to be driven like that of the newhouse at idaho springs or the axell kelly tunnel at georgetown or the standard tunnel at cripple creek first of all the ground must be gone over by a competent engineer or mining surveyor he must locate carefully and at niva measured distances all the veins outcropping cropping out on the surface locating also dikes and other peculiar geology veins projected downward from their outcrop on the surface these notes with his profile section the surveyor uE usually Lually hands to the artist to enlarge and embellish but before the artist undertakes under taRes to make his panoramic sketch for a prospectus or for a company it is visible advisable ad and necessary for him to go all over the ground with the sur beyor or engineer observe every prominent outcrop of vein dike or geological forma form tion visit and enter every developed mine and prospect hole and descend the other side of the mountain ridge to be penetrated by the tunnel having seen everything that is possible he now as for instance at the kelly tunnel at georgetown fig 1 1 crosses the canon and climbs up to a convenient height on the opposite hill from which he has a fair panoramic view of the mountain and area to be tunneled the surveyor accompanies him and shows on the opposite mountain by prospect holes outcrops peaks peak and other prominent marks the general course the tunnel will follow he also locates and names the principal prospect holes and mines visited by both himself and the artist FIGURE 2 previously and calls attention to the course and pathways of dikes and veins on the surface and any other important landmarks Then the artist begins his sketch drawing in a general panoramic way what lies before him in the maner described in previous articles giving special emphasis and importance to prominent mines veins or prospect holes and across his sketch in a dotted or black line he draws the general course of the tunnel from the tunnels mouth to the point in the outline of the hill under which perhaps 1000 feet deep the tunnel will pass if as is generally the case as at the kelly tunnel georgetown the tunnel passes through a mountain ridge and under the succeeding ding valley to ani another ther ridge then the artist has to make a separate sketch of the mountain and area on the other side in drawing the panoramic sketch for the newhouse tunnel we sketched first frota from the hillside on the south bank of the creek directly opposite the entrance to the tunnel and then climbing to the top of pewabic mountain on the opposite side draw on a COLUMBIA mt republican mt DEMOCRAT mt OF dreuy TUNNEL dilver PLUME N AW N X n 4 oo 00 pik KELLY s C akk CREK X EAST FACE OF CLEAR CAN YON SHOW c 0 LOCATION OF KELLY TUNNEL AT COLO V THE northwest of OF KELLY TUNNEL TO ITS TERM J ON CREEK bocc 4 c 0 k 4 KEI af TUNNEL ENTRANCE cl I FEET s MINES AND minerals CROSS SECTION OF DEMOCRAT mt SHOWING VEINS THAT will BE CUT BY THE KELLY TUNNEL FIGURE 1 leal ical formations next by surveying survey big implements he must take the principal heights and elevations of the mountain above the projected tunnel having obtained these accurately cura tely there is little difficulty for either him or later the artist in giving a general profile section of the mountain showing the course of the tunnel and the course of the separate piece of paper the country on the central city side where the tunnel is to end another way of making such a drawing would be by a sort of relief flat contour topographic or panoramic map of the whole country such as would be seen from a balloon and locating on it the line of the PIKES PEAK caiato t Z leate CAA SY 11 projected tunnel the panoramic sketch being drawn and colored with the principal river shown the timber availabilities railroad and nearest town the artist now applies himself to a colored profile cross section of the mountain this is merely an enlargement of the section and notes given him by the sur beyor or mining engineer on the top or crest of the section lie he shows the little mine houses or plants leading down from them drawing them proportionately according to scale and measurements supplied by the mine surveyor to make the grim unar looking section appear a little more natural he may introduce a few fir trees on top and also show in perspective a portion of the mountain or valley to which the section belongs or the distant scene fig 2 this makes the diagram more real and natural in coloring the great mass suppose the mountain is of granite gneiss and schist instead of making it of one hideous uniform daub of color or a flat mass the artist introduces undulating shades of color such as might be supposed to exist if the bands of gneiss and schist composing the mountain were exposed the dikes he draws in dark colors strongly in a long section of two or three miles the veins can only be delineated by black undulating lines and ve inlets extending from them the artist endeavors to make the section as natural and realistic looking as possible if the mountain is a composite one made of different strata of different geological periods these will be shown in the usual way and with varying colors adapted to each formation the panoramic surface sketch and the underground cross section complete the artists work I 1 |