REV00794 - Laserfiche WebLink

Home Browse Search

C~ MLRB Page 2 in the spring of 1981. If reseeding proves to be necessary, Frei intends to follow the Oikos recommendations (see letter of December 23, 1980 from Oikos) as to seed mixtures and revegetation techniques. follows: The technical revision submitted by Frei is as 6tining Plan, Revised. Because of past activities and the geography of the site, almost all of the affected land will be in a disturbed state during the first year of the con- tinuing operation. In order to maximize the recovery of the natural resource, the revision includes the mining of the area between the existing lakes and the South Platte River. Extrac- tion will be started along the western side of the property. When that excavation is completed, mining will occur in the extreme north end of the property and will continue to the south. Approximately 20 acres at the south end will be used for a plant site and stockpiling until it becomes necessary to move them to get at the underlying sand and gravel. (See lriap Exhibit D-1, Revised.) An area in the southwest part of the property will be excavated immediately so that it can be used as a settling or silt pond. It is expected that waste fines will fill this area prior to completion of mining. As excavation continues to the south, the plant will be moved to the silt-filled settling pond area. The plant will remain there until mining is completed. The existing pond at the southeast end of the affected land will be divided by placing a berm from the east end of the island to the north shore and from the west end of the island to the south shore. The smaller water area will remain as a clear, freshwater pond. As noted in the Oikos letter, the soils in the eastern part of the property, Dacona loam and Terrace Escarpment, were used to resoil the banks of the four northern lakes and the banks of the lake to the south. Soils on the western side of the property are Sandy Alluvial Land (Sm) and Wet Alluvial Land (VYt). Both of these soils are rated poor for use as topsoils, although an occasional area of Wet Alluvial is rated as fair topsoil. Previous operators have removed most of the topsoils and have stockpiled them as indicated on Map Exhibit D-1. The stockpiled soils will be used or moved as mining progresses through the area. Excavation of the aggregate will be by dragline. The exterior pit perimeters will be mined at 3 to 1 so that no backfilling and only minimal reshaping will be necessary as each reclamation phase begins. '~