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MqY-03-06 11:26 qM DOUG CONGER 97B 565 8396 P, gq <br />Mc SlQ44_Itgsponsg #~: <br />Carom all outward appearances the sedimentary Dakota Sandstone depositional bed to be mined is a <br />monolithic, highly indurated unit without apparent significant bedding or fracture structures. The stable <br />naturally occurring exposed steep canyon walls of Plateau Creek gorge are the primary evidence of such. As <br />extraction progresses from the Pre-Quarry to deeper within the sandstone bed any conflict with this <br />evaluation can be readily detected, and the plan for final finished highwall slopes at the extraction boundaries <br />can be accordingly altered to assure a stable situation, <br />To that end we propose conditional approval of the application-proposed near-vertical benched one-quarter <br />vertical to one horizontal (''/.:1) headwall slopes, dependent upon a structural evaluation to be completed and <br />reported to Division by the applicanUoperator prior to the final extraction perimeter explosive shots. In this <br />way we can he assured of the absence of a heretofore undetected troublesome bedding or fracture plane that <br />would contribute to an unstable highwall. And if such anomalies are detected. the plan for highwalls to <br />remain shall he appropriately modil,ed. <br />Adeauasv Item #4l <br />1. MG has completed a preliminary reclamation cost estimation total/ny 518,193. The <br />reclamation cost estimation /s based upon the proposed reclamation plan and several <br />aasumptlona. Ono 01 the assumptions la that the highwall would be scaled for loose rock (task <br />2). The enclosed reclamation cost eatlmatlon is preliminary and maybe reWaed otter DMG <br />recelvea response to the adequacy Issues raised fn this letter. <br />M~StonG QQmrnent #4 ' <br />Division calculations for the initial financial warranty value are acceptable to the applicant, with the <br />following clarifications. <br />Task #1 Weight scales ere not intended to be used at the site, and are not designated in the Mining ar <br />Reclamation Plans. No other semi-permanent stnretures are intended to be constntcted either. All <br />processing equipment is portable and shall be located at the site only seasonally before mobilizing it <br />for many other operation applications. <br />We therefure consider Task #1 to be un-necessary in the cast calculation for financial warranty. <br />wr«• <br />As verbally discussed with you earlier we wish to clarify that labeled "Permit Boundaries" in the three Plan <br />Map exhihits are considered to be the "Affected Land" areas, as defined by Rnlr l.l(3) Laheled <br />"hxcavarian /.imil.+" are intended to only reflect approximate extraction and operations area boundaries. <br />Peripheral distrtrbance between those two designations may occur from time to time. <br />You have been provided with copies of the US Army Corps of Engineers correspondence regarding <br />wmpliance with Corps 401 & 404 permit requirements. tt has bean estahlished that compliance therewith is <br />not an issue at the proposed site. <br />The applicant has requested that we modify the address of record to assure that all correspondence is <br />invariably directed to the Corporate Secretary. 1 have therefore corrected and attached the title pngr and <br />Page 3 of the application form to reflect the official mailing address of .,. <br />MC~'t'ONF. AGGREGATES. LLC <br />PA. Box 4S3 <br />