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xurface areas disturbed ~v surface operations and facilities according to 4 09 Each plan shall describe the <br />geotechnical investig~ion design construction operation maintenance and removal if appropriate of the <br />• stmcture and be prepared in accordance with 2 05,3 j6)(b) (~) and (dl <br />RESPONSE <br />There will be no excess spoil generated at the surface areas disturbed by the surface operations and <br />facilities of the Foidel Creek operation. <br />Qperational Conditions ~, ~~k ~.S ~~i5 M"~"'^~ <br />Underground development waste from fault crossings, overcast development, roof rock and ventilation shafts shall <br />be primarily deposited underground in gob rooms. Excess material and/or material high in carbonaceous material <br />will be placed in the adjacent Area 2 Pit (previously affected by surface operations). The underground <br />development waste disposal area will be reclaimed as described under Rule 2.05.4(2)(c) below. The revised area <br />for disposal of development waste will be the area as shown on Map 24, Surface Facilities. The anticipated volume <br />from development is 200,000 CY. The selected site is capable of storing an estimated waste material volume of <br />400,000 CY. Yearly volumes will be tabulated in the Annual Hydrologic Report. The fire fighting plan for the <br />refuse pile can be found in Exhibit 25A. <br />The material will be deposited from an open highwall with a front end loader, truck, bladed dozer or directly from <br />an underground car. Compaction will be performed similarly to that which will be done in reclamation of adjacent <br />surface mined areas. The deposition of the waste material will be a stable configuration bounded on all sides. No <br />geotechnical investigation was considered necessary for either the site or the operation of the placement of waste. <br />Map 25, Surface Area Cross Sections, shows a typical cross section of the disposal areas (Section Y-Y). <br />Represented in the cross sections is the approximate disposal depth and postmining topography. <br />As stated above, TCC placed underground development waste into Pit 2. TCC furthermore stockpiled low quality <br />coal above grade at the underground development waste site in anticipation of processing the low quality coal <br />material through the preparation plant. Waste generated during the mining cycle and resulting from the operation <br />of the preparation plant as the low quality coal stockpile is processed will be placed as necessary in a waste pile to <br />be constructed at the TCC facilities. The waste pile has been designed to hold approximately 3,000,000 cubic <br />yards of material. This waste pile will be located adjacent to Pit 2. In the event processing of the low quality coal <br />stockpile progresses to the point that the underground development waste site contains available below grade <br />storage volume, waste generated during the mining cycle and resulting from the operation of the preparation plant <br />may again be placed at the underground development waste site. <br />The waste pile has been designed to accommodate material generated from the preparation plant, waste material <br />from the mine, or a combination of preparation plant and mine waste material. This material or combination of <br />material will be hauled to the pile by means of TCC's existing mobile equipment. The design of the waste pile was <br />contracted to CTL/Thompson, and the design is presented in Exhibit 26A, and updated and modified with the <br />design presented in Exhibit 26A-1. The revised surface runoff diversion system desig- o ale was developed <br />in-ho-house by 'fCC and is presented as Appendix D to the CTL / Thompson repoR. The proposed locations of the <br />waste pile and perimeter drainage control ditches are shown on Map 24, Surface Facilities. <br />As shown on Exhibit 26A, Figure 1, the pile will be constructed west of the reclaimed valley to the west of Pit 2. <br />Prior to construction, approximately 18" topsoil from within the pile footprint will be removed and placed as <br />necessary in topsoil pile SF-12 (see Map 29). During reclamation of the pile benches, topsoil will be redistributed <br />over the face of the pile. Direct placement of topsoil will occur to the extent possible during the bench reclamation <br />/pile extension process. It is anticipated that topsoil replacement will stay one bench below the active working <br />APP1t®1/~dD JAN 0 5 '.^"-9 <br />TR 98-31 2.05-92 1 I /2/98 <br />