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<br />i <br /> <br />I <br />I <br />~ _ <br />~~ <br />I <br />i <br />I <br />i <br />I <br />i <br />'~ <br />i <br />I <br />(E <br />I \) <br />I <br />i <br />LATEST NAME OF I•IIt~ Imperial <br />COUNTY LATEST OPERATOR <br />Boulder Northern Coal & Coke'Co. rrr a' <br />._ _ C <br /> <br />YEAR. PREDIOUS OPERATORS C <br />YEAR . TON3 YEAR TONS YEAR TONS <br />•lg l <br />8. 1S l,9~- <br />KIND OF COAL <br /> Im rial Coal oC 6 <br /> <br />ee <br />• Soere orthern. <br />21 ( <br />d'Ca p - /~;7~, <br /> 8 8 <br /> Tt-1-x 1 _ H. <br /> ~ <br /> ~ <br />es <br />~~ <br /> - ROCK SLOPE- LENGTH <br /> <br /> <br /> •ROCK TUNNEL LENGTH <br /> <br /> <br /> SEAM <br /> C 0 <br /> ~ <br /> ~ <br /> PITCH <br /> <br /> <br /> <br /> RAII,ROAD AT MINE <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> l <br />