2013-09-16_REVISION - M1983028 - Laserfiche WebLink

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Exhibit Page 16 Initial Disturbance and Operations at Beginning of Conversion Initially, disturbance will be limited to: 1. Existing affected areas (Up to 3.8 acres on Stone property (blocks C2 -C3) and 8.4 acres on the LMN property (blocks F5 -G5), including 1280 feet of "highwall "), Total 13.2 acres. 2. Stripping and removing overburden from block H5, of up to 2.75 acres (based on 600 -foot highwall length and up to 200 feet wide, for a total highwall of up to 1,000 feet 20 feet high. Increases total to 16 acres. 3. Construction of a road 'over the fence" to link the existing permanent road on the Stone property with the permanent road and current works on the LMN property east of the WAPA easement, which will require construction of approximately 300 feet of new, 24- foot -wide temporary road and disturbance of approximately 40,400 sf (0.93 acres mostly in block F4). This may not be done immediately but will increase total to 16.9 acres. Sequence of Mining Mining will be conducted in just one block at a time, but more than one area may be open: for example, the existing pit on the Stone property (pit 0.69 acres, highwall 380 feet, height 10 feet) will remain "open" (See Exhibit S) until that entire area is mined at some time in the future, while mining is done on the LMN property. Refer to the diagram below. rte- 200 --- 100 rte— Variable--, County operations reducing hi Zone A. Ceanng, Grubbing, and Strippin Highwall (Working Fac! Zone 8 Work .Area at Foot of Higrrw,, Zone C Plant and Stockpile Are Zone D Soil placed, re+egetatin Highwall reduced to final grade (21 or Highwall reduction in prog Schematic of Pit Operations, Wallace Pit Operations move from right to left (East to West) Initially, the main mining area will be located on the LMN property (1-15), working a face of 600 - feet long (estimated at up to 20 feet high) and narrowing steadily as mining moves west. Vegetation will be removed and soil stripped in an area up to 200 feet wide (average 100 feet) in advance of the highwall. The working area at the foot of the highwall will be maintained at 100 feet wide and up to 600 feet long, and will be (except for the north and south areas) at final grade. The plant and stockpile area behind the working area, also at final grade, including the north and south edges will be approximately 300 feet wide and up to 500 feet long.4 The highwall along the south side (property line and permit boundary) will not be longer than 150 feet before being reduced to final grade. The highwall on the north side (permit boundary) will remain in place until Montezuma County mines the area immediately to the north (being done concurrently with the Stone operations). County mining will eliminate the highwall, which is therefore not expected to be more than 150 feet in length, and located on the permit boundary 4 Generally a minimum of 2 acres (400x200) is needed for the plant and at least 1 acre for stockpiles.