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,~z, . 8 33 ~Z . 3~~~P ~,N/ MR. PETER O'CONf~R June 10, 1986 Page 3 (b) Water Quality Permit Application Niunber is as follows: CO-0041394 (c) MSHA Legal Identity Report Niunber is 191143. BLUE FLAME COAL MINE Legal Identification Number is as follows: OS-02303. Z'8,~ The two (2) permit applications from the COLORADO DIVISION OF MINES has been submitted. However, application rnunbers have not yet been returned to us. We will get the numbers as soon as possible and notify you imriediately. 2.04.6 GEOLOGY DESCRIPTION (1) The first sentence in the last paragraph of Page 4 involving the surface geology should be amended to read as follows: "Only the Menefee Formation is ex- posed on the oroperty," (2) The lower unexposed coal seam will not be developed by the BL[JE FLAME COAL MINE. Please find enclosed a map with the revisions made. Note also the text to be expanded is as follows: Imnndiately below the coal seam to be mined by the BLUE FLAME COAL MINE lies approximately 64 feet of sandstone that belongs to the Menefee Formra- tion. The lower coal seams location, at best, can only be approximated and I have approximated its location on the cross section of the C~ologic Plan Map mapping area. It lies 65 feet below the coal seam to be rtL~sed. Enclosed is a typical strat column of the Hesperus area. (3) The Geologic Plan Map cross section has been rtgdified to approximate the position of the lower aquifer relative to the coal seam owned by the BLUE FLAME COAL MIPE. I have learned that the lower portion of the Menefee Formation may not be the active aquifer in the BLUE FLAME CDAL MINE area. During a personal conversation, FRED JOHNSON and I discussed the possibility of the Menefee Formation not being said aquifer. There is no evidence that the Menefee Formation has been bsPacti~ sufficien- tly enough to facilitate charging of the Menefee within the the irmiediate BLUE FLAME COAL MINE area. It appears that the most probable recharge area for the Menefee Formation is 1.5 to 3.25 miles North of the BLUE FLAME COAL MINE. The lithologic unit that is the roost active as an aquifer in the BLUE FLAME COAL MINE area is the massive upper sandstone unit of the Point Lookout Sandstone. It's..location has been depicted in the cross section that has been revised. 2.04.7 HYDROLOGY DESCRIPTION (1) Concerning the "buried pipes", regarding the disturbed mine bench area. Due to a typographical error "buried pipes" was inadvertently added to the sentence quoted. It now reads: "Surface runoff on the permit area (disturbed mine bench) is collected via proposed drainage channels and directed into the future sediment pond. Where it is necessarf, small swales '.will be placed such that they facili- tate the draining of any low spots. These swales ~silJ be no more than six (6) inches deep and ten (10) inches wide. Their location will be field determined