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- 2 - <br />. ~ ,,. <br />•^ area. (See excavation map). Paddle wheel scrapers are used for <br />this stage of mining. Following the removal of topsoil and overburden <br />materials (ranging from two to three feet in thickness) a backhoe will <br />be used to excavate a dewatering trench around three sides of the phase <br />under mining. While the dewatering trench is being excavated, scrapers <br />will remove the remaining overburden and use it in the reclamation of <br />tract "A". The excavated pit run is loaded into end dump trucks and <br />hauled to a portable crusher. (See site map for location). A portion <br />of the excavated pit run is crushed for asphalt plant mix, (approximately <br />50$). The remained is processed through a portable wash plant for <br />premix concrete production. <br />Water used for the proposed mining operation will come from wells <br />with industrial uses. We11 12261F has a tested capacity of 150 GPM. <br />You should also refer to case No. W-3477 State of Colorado Water Court• <br />Well Number 14515 has an industrial consumption use of 500 GPM. Flat- <br />iron is an active member in the augmentation program organized by GASP. <br />The excavation plan map found in the permit application shows the <br />direction in which the mining plan will travel for each separate phase <br />of the mining plan. The mineable gravel in this pit averages 15 feet <br />in thickness or approximately 35,000 tons per acre. Annual surface <br />disturbances will be about fifty acres for the active mining operation. <br />All tracts "B" through "E" will be mined in the manner described <br />above. <br />The overall goal of the reclamation plan for this project will be <br />twofold. First, Flatiron hopes to reclaim as much industrial land as <br />possible along the western boundary of the permit area. Those lands <br />that cannot be used for industrial development will be reclaimed as <br />prairie grass lands. The finished topography will be a series of <br />surface depressions, The topsoil and overburden that was placed at <br />the perimeter will be backfilled to create slopes not to exceed a ratio <br />of 3:1. All steep bank areas will be backfilled to a minimum slope <br />ratio of 3:1. This activity will take place at the end of each given <br />phase of mining. This will be carried out for the perimeter of tract <br />"A" after mining of tract "B" begins. <br />After backfilling and topsoiling the following seed mix will be <br />applied. <br />Seed Mix <br />Common Name <br />Lincoln Smooth Brome <br />Intermediate Wheat Grass <br />Nordan Crested Wheat <br />Slender Wheat Grass <br />Russian Wild Rye <br />PLS/Acre Rate Lb. <br />12.5 <br />10 <br />10 <br />10 <br />7.5 <br />Total PLS/acre - seeding 50 <br />