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52.05 APPLICATION FOR PERMIT FOR SORFACE OR UNDERGROUND MINING ACTIVITIES -- <br />MINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS. <br />2.05.6 Mitigation of Surface Coal Mining Operation Impacts. (Cont'd.) <br />(6) (a) (ii) (A) (Cont'd.) <br />maintained gravel, light-duty forest <br />access. Several culverts underlie the <br />road, and bin wall stabilization is em- <br />ployed at several locations. Refer to <br />Structures Map 9-7 for appropriate lo- <br />cations of all identified structures. <br />(B) See Maps 9-1 and 9-7. <br />(b) The potential for worst possible consequences as the <br />result of subsidence to the structures and Renewable <br />Resource Lands identified in Section 2.05.6(6)(a) (ii)- <br />(A) has been diminished significantly with the attach- <br />ment of stipulations "1" and "g" respectively, to Lease <br />C-37210. Although structures and Renewable Resource <br />Lands will not be undermined during this initial permit <br />term, the worst possible consequences during subsequent <br />permit terms are discussed below. <br />• Federal stipulation "1" states a 300 ft. buffer zone <br /> <br />~ will be maintained around occupied structures. A1- <br />though the possibility is slight, the worst possible <br />~ ~ ~ <br />~ <br />~S <br />3~ q consequences to buildings is cracking of interior and <br />exterior walls <br />di <br />t <br />se <br />er <br />ti <br />f <br />i <br />( <br />, <br />r <br />~ , <br />er, <br />w <br />, <br />srup <br />on o <br />serv <br />ces <br />wa <br />S <br />" propane, etc.), and jamming of windows and doors due to <br />'/~ <br />6 AP~yY <br />~/' <br />d~ V differential settlement of the ground surface. <br /> The water supply pipeline serving Pitkin Mesa and the <br /> Orchard Valley Mine may become disrupted or separated <br /> due to strains induced by subsidence during subsequent <br /> permit terms. The Pitkin Mesa Pipeline will not be af- <br /> fected below 600 ft. overburden due to protective buf- <br /> fer zones required by Federal lease stipulations. <br />/h/~ The Renewable Resource Lands identified caith in Steven's <br />n Gulch and Roatcap Creek drainages have been isolated <br />' <br />^pn`^~ from the worst possible consequence of subsidence by <br />I <br />1 <br />~~~U~ Federal lease <br />extraction will C-37210, stipulation "g" <br />be limited to necessary which states, <br />development ac- <br /> cess entryways below 600 ft. overburden depths. Sig- <br />nificant mine inflow could partially dewater these sur- <br />ficial aquifers if fault or fracture zones allow <br />Added 12/26/84 <br />Revised 12/26/84 <br />Revised 10/01/87 <br />140 <br />