1991-09-03_REVISION - M1984099 (3)

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Tectonic Construction, Co. Page 2 MLRB Permit # M-84-099 Technical Revision We have combined Phases 2 and 3 into one, Phase 2 and com- bined lakes 4 , 5 and 7 into one lake, now designated Lake 2. We also , renumbered the lakes to reflect their order of creation. The medium shaded area in Phase 2 is where the pipeline Right of Way and setbacks split old Phase 2 and cut the top off of old lake 7 . The dark shaded area is the strip of land that separated lake 5 from lake 7 that will be removed. When this is done we have created one large lake out of three smaller ones. The light shaded area in Phase 1 , was not mined because there is no gravel under the overburden. The last item new to this map is the area in Phase 1 where we are developing wetland habitat. Each change will be discussed in detain below. PHASE 1 CHANGES In - Phase 1 the change that we show was the result of finding that the gravel was thinning out as we moved towards the north property line. This is a 5 .53 acres ± parcel along the northwest property line that did not have any gravel under it and 9 .78 acre addition of a wetland development area where the gravel was shallow, less than 8 feet deep. Two islands were created on the southern end of the lake as a way to use excess topsoil and fulfill a request by the landowners. These two changes decreased the lake surface in Phase 1 by 7 .21 ac. ± and will benefit the final land use as originally proposed. They will enhance the area further. PHASE 2 CHANGES This is where most of the changes in the plan will take place. First, we are combining Phase 2 and 3 in one phase , now called Phase 2 . It is here that the gasline R. O.W. , setbacks and slope were removed as stated in the approved plan. In the original plan, the northern end of old Lake 7 was un-minable because it was between the river setback and the pipeline and was too small to mine. In this change we extended the northern end of Lake 7 to the 100 foot setback along the river and took out the separation between Lakes 5 and 7. This will combine lakes 4 , 5 and 7 into one lake now numbered Lake 2. The water surface area in Lake 2 will increased by 9 .08 acres ±, and the revegetated area decreases by 5 .69 acres ±. We stand to gain approximately 191 ,422 YD3 of material based on a reserve depth of 15 feet. The overall net changes are minor in nature when you compare the attached timetable with those originally submitted on pages 11 and 20 of the permit application. There is an increase in lake surface of 1 .87 acres ± and revegetated area by 1 .52 acres ± on a parcel of land containing 216 . 81 acres ±. PLANT SITE. CHANGE/LAKE RE-NUMBERING Originally there were to be two plant sites as mining progressed. One was to be located north of the St. Vrain River