Laserfiche WebLink
Diversions and Impoundments <br /> Roads and irrigation ditches will effectively minimize stormwater surface run-on to the mining site,so run-on diversion <br /> structures are not anticipated. During the initial mining activities,stockpiling of topsoil and overburden on the <br /> surface is anticipated. Diversionary channels,as shown on Exhibit C, will be used divert surface runoff from leaving <br /> each of the Areas or entering the wetlands areas. Surface diversion channels will convey runoff to settling ponds, <br /> prior to discharging to the South Platte River. As mining progresses and the excavation increases in size, <br /> diversionary channels will convey less runoff because more runoff will enter the mine excavations. Runoff that <br /> collects in the excavations will be conveyed by the dewatering trenches to a common point,where it will be pumped <br /> to the river after sediment settling has occurred,if necessary. <br /> Material Processing and Associated Facilities <br /> Pit run material will be hauled or conveyed off-site to the Wattenberg Lakes site(M-2004-051)to be conveyed for <br /> processing at the Platte Valley site(M-1989-120). <br /> Commodities to be Mined and Intended Use <br /> Sand and gravel for use as construction materials will be the primary products produced from the proposed Tucson <br /> South Resource. Test pits have verified that commercial deposits of sand and gravel exist up to 50 feet below the <br /> surface of the ground. In addition to the commercial sand and gravel materials,topsoil and overburden materials will <br /> be used on-site for reclamation. <br /> Use of Explosives <br /> The material is unconsolidated deposits, no explosives or blasting are required. <br /> Wetlands <br /> Tetra Tech also prepared the Tucson South Sand and Gravel Mine Project—Adams County, Colorado <br /> Wetland Delineation Report dated February 2019. A copy of the report is included in Exhibit J. <br /> A buffer zone has been added to the Exhibit C maps around all the delineated features within the mining excavation <br /> limits.The buffer width is proportional to the planned depth of mining surrounding the delineated features. Note 16 <br /> has been added to Exhibit C-1 to state that wetlands buffer shall not be disturbed until USACE authorization has <br /> been obtained <br /> Aggregate Industries Tucson South Resource <br /> Permit#M-2004-044112 Permit Amendment <br /> Page D-8 <br />