2002-03-11_REVISION - M1977344 (3)

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EXHIBIT D MINING PLAN A limestone quarry and cement manufacturing facilities have been operated at this location since the late 1890's. Anew plant is under construction at this time. Plant Z and 3 have been shut down and are currently being dismantled. Components of the new plant and the facilities being dismantled aze indicated on Figure C-6, Exhibit C. Holcim (iJS) Inc. proposes, as part of this proposed permit amendment, to add the plant area (approximately 69 acres) to the MLRB permitted area. CONFIDENTIAL INFORMATION Provided under separate cover Within this existing permit area, 60 acres have been released from bond: one area in 1987 and the other in 1990. These areas are indicated on the Reclamation Plan Map (Exhibit F). In the area released from Bond in 1990, approximately 4-5 acres will need to be disturbed for the relocation of Bear Creek. The quarry will advance approximately 32 acres per year. The cuts, indicated on the Mining Plan Map, range in size from approximately 24 (Cut 1) to 40 acres (Cut 17). The amount of time to mine each of these cuts is currently estimated to range from 1.3 years to 2.9 years. Bear Creek drainage needs to be disturbed in 2002. Holcim (L1S) Inc. has already received a 404 Permit from the U.S. Army Corps of Engineers to divert this creek. The diversion has been designed to handle a 100-year storm event. The point of diversion will be just south of Interstate 50 as indicated on the Mining Plan Map. The diversion will run generally to the southwest, across previously mined areas of the quarry, for a distance of approximately 7155 feet. A portion of the diversion channel, located approximately 500 feet west of an area where CKD was historically buried, will be lined with bentonite to mitigate against seepage from the diversion channel into the subsurface and towards the buried CKD. Design drawings, including typical cross-sections, aze included in Exhibit C, Figures C-3 and C-4. CONFIDENTIAL INFORMATION Provided uuder separate cover The mining technique used for extraction is strip mining by way of a truck/shovel or truck/loader operation for the removal of overburden and truck/loader operation for the removal of limestone, sandstone and topsoil. Topsoil is first removed and stored for future reclamation. The next step is to remove any loose rocky material. The overburden is then drilled and blasted to reduce the size of the rock mass to an economically desirable size. The shovel then removes this material and loads it into 5 of 34