2003-03-24_REVISION - M1978268 (2)

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from the site. Stage 1 slopes shall be progressively topsoiled and revegated to return that area to wildlife use before continuing any disturbance beyond the existing disturbed area. Initial disturbance if any Stage Z azea shall be delayed until the reclamation topsoiling, seeding, mulching, and planting has been performed on the benched sideslopes of Stage I. Stage 2 will begin the next, as yet undisturbed, 5'/<-acre unit adjacent to the south of Stage i, and shall be extracted in a similar manner to the first stage. When completed, Stage 2 will add approximately lYz acres of level temporary pit floor to the current pit floor at the approximately 7,380 M.S.L. elevation, portions of which aze to be utilized for processing and stockpiling while other portions aze excavated in the fourth and final stage of extraction. Approximately 3;/, acres of slope shall be exposed, including O a portion of the forest access road, ®the extension of the stormwater runoff control bench at elevation 7,450, and ®the temporary south highwall. Those slopes shall be topsoiled and revegetated before disturbance of any additional surface area in Stage 3. Stage 3 extraction in the southerly portion of the permit area shall extend the extraction to between the Stage 2 area and the water retention pond excavation. Extraction shall progress downslope as before in the previous stages, with stockpiling and processing being conducted in the southeasterly portion of the temporary pit floor, just west of the Stage 2 finished slopebank. An additional acre of new temporary pit floor shall be thus created at approximate elevation 7,380. Approximately 2'/z acres of slope shall be exposed, including O the last portion of the forest access road, and ®the last extension of the stormwater runoff control bench at elevation 7,450. Those slopes shall be topsoiled and revegetated concurrently with beginning the 1 ~ 2-foot deep extraction bench of Stage 4. Reclamation topsoiling and seeding of the finished slope banks shall be progressively employed as extraction excavation reaches the stormwater runoff control benches to be incorporated within each stage Stage 4 area excavation shall be accomplished in 20-foot extraction benches alternating between the left half and the right half, and using the other half for processing and stockpiling until enough space is generated in the excavation to relocate operations at the level being excavated. Mining of the I~` Bench - right half shall begin in the completion of the Stage 3 extraction, daylighting out to the west natural slope at approximate elevation 7,360, and extend extraction at that elevation in a northerly direction. Mining shall be at a depth of about 20 feet and a width from the Stage excavated slopebank to where the level excavation daylights to the west downslope. Excavation shall be with either a large track-hoe or a dozer and a frontloader to load the crusher. Processing and stockpiling operations shall utilize an unmined portion of the 1'` Bench temporary pit floor. A finished 2:1 slope shall be carried along the west (left) edge of the excavation, continuing the slopebank created in earlier stages. A temporary highwall shall progress with the extraction towazd the north and west. As soon as an acre or so has been extracted, process &. stockpile operations may be shifted to the newly-finished temporary pit floor as extraction proceeds northerly, then westerly to compete all of the 1'` Bench at the west boundary. The perimeter edges shall be excavated with the continuance of the finished 2:1 slopebank from earlier stage extractions. A 12-foot stormwater control bench shall be incorporated at elevation 7360 into the northerly and easterly and westerly finished sideslopes in a similar manner to the bench at elevation 7450 for Stages 1, 2, & 3. Topsoiling of the slopes above elev 7360 shall be performed before further excavation downslope. The 2"d extraction bench of Stage 4, based at approximate elevation 7,340, shall be accomplished in a similar manner as the h` extraction bench, beginning at the newly "daylighted southwesterly edge and progressing back to the southerly boundary in a clockwise direction. A 12-foot setback from the formerly excavated slopebank will accommodate the stormwatet runoff control bench at elevation 7360. As before, no reclamation shall be performed in the temporary pit floor, since successive extraction benches of Stage 4 excavation must first be totally completed. The third, fourth, and fifth extraction benches of Stage 4 shall follow in sequence, in a similar manner to the first two. Sideslope restoration, below the 7,360-foot elevation stormwater control bench, shall be SIe: E l OurayCO 1 DallasGlav 1712AalenCApp1 17 01lL7N3