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<br />Phase 1B will be the last area completely reclaimed, as this area will be used for discharge of wash <br />water as long as the Plant Site is in operation. As also shown on Exhibit C-2, Mining Plan Map, <br />mining is proposed in the following phases as outlined below and on the next several pages. The <br />relevant setback from any substantial man-made structures follow the Slope Stability Evaluation <br />recommendations prepared by TuttleApplegate, Inc. A copy of this Evaluation is included at the rear <br />of this submittal, and a drawing of the Typical Excavation and Reclamation Plan Section is shown <br />on Exhibit F, Reclamation Plan Map. Although mining is always dependent upon market demand, a <br />time table and description of the mining of each phase is as follows based on a total life of the mining <br />operation of 10+_ years. For all mining phases, concurrent reclamation of backfilling to create the <br />required slopes will be undertaken within each phase as mining is occurring. Calculations on the ~Il~ <br />cubic yardage required for backfilling the slopes are included on Exhibit C-2, Mining Plan Map. ~A <br />Mirung Phase <br />Year or Activitk Description ofMinin~ and Other Disturbance Activities <br />Mining <br />1 Phase 1 A Phase 1 A mines 6± acres of Parcel A. Approximately 11+ acres of Parcel A, <br />within the low flow channel of the S. Platte River, will be left undisturbed <br />except for any channel improvements required by UD&FCD. Another 10+_ <br />acre tree stand area will also be left undisturbed. Mining of the 6+ acre area <br />is expected to be completed during the 1" year, and will create 6± acres of <br />new wetlands area around the undisturbed tree strand as part of a mitigation <br />plan to remove probable jurisdictional wetlands on Parcel B. This 6+ acres <br />includes some area within 400' of the S. Platte River channel. As mining <br />within 400' of the S. Platte River channel requires approval by UD&FCD and <br />agreement on what S. Platte River channel improvements should be installed <br />as a condition of approval, no mining will occur without such approval and <br />agreement. The 400' area is shown on Exhibit C-2, Mining Plan Map. <br />Mining will involve the excavation and storage of 6-12"± of topsoil, <br />excavation and storage of overburden material, excavation of aggregate <br />material and export to Parcel C for processing or direct export off site if there <br />is demand for the material to be used as borrow at the time of excavation. <br />This limited mining to create new wetlands will be part of 1" Phase of mining. <br />The proposed mining setbacks are: 50' from any of the three PSCo. towers, <br />35' from the top of existing old berm along the east side of the S. Platte River, <br />50' from the west outside top bank of the Fulton Ditch and the Spring Creek <br />Seep Ditch and 35' from the 104'" Avenue right-of--way and PSCo. right-of- <br />way. The combination ofthese setbacks lead to the closest mining being over <br />35' to the United Power poles in the right-of--way, 85'± to the any of the <br />PSCo. tower structures, 75'± to the Spring Creek Seep Ditch, and 50' to the <br />Fulton Ditch. <br />3 <br />