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~,o Py - MA rt )<F~ +-~P wt} E.c.F Ct~~~/~ B~ Fob <br />'~- <br />(L>FSPaN~E ( ~ 1~~7 ~~~ ~cT7fiC d- Olvls/~~/ <br />a~ <br />EXHIBIT C-1A vlIICOL/ FE <br />DR ~'-MTNTNC CONDrTTONG OF AFFECTED LAND NA_RfLATTVE <br />(Revised 01/06/95) ~un/tE~C,N~ <br />Overview <br />This is a request to mine sand and gravel material from a 180+ acre <br />parcel located on the east side of the South Platte River, north of <br />88th Avenue. This operation will be a continuation of the sand and <br />gravel extraction operation that Cooley is presently mining to the <br />south under permit M-89-066. <br />Surrounding most of the mining area, a slurry wall will be <br />installed to seal off surrounding alluvial ground water. The <br />extracted material will be transported primarily via conveyor <br />across the South Platte River to the existing plant that is located <br />on Riverdale Road at 96th Avenue, although Cooley does reserve the <br />righC to do on-site processing and transport material off property <br />with tricks . <br />Upon completion, most of the property will be utilized as a <br />potential water storage reservoir. All or parts of two areas <br />outside of the slurry wall will be backfilled. Any parts of these <br />two areas left with open water area will have an augmentation plan <br />filed. One of these areas will be revegetated with low maintenance <br />grasses for eventual use as open space and/or farming; the other to <br />urban uses as allowed by Commerce City. The operation is expected <br />to be undertaken within one year, and last from five to ten years, <br />depending upon demand. <br />As mentioned above, the site is located east of the South Platte <br />River and north of 88th Avenue, to the approximate alignment of <br />92nd Avenue. The eastern boundary are other properties, except at <br />one point where the property abuts Monaco Street. The topography <br />is fairly level over most of the site, with elevations ranging from <br />5,070±~, on the south abutting 88th Avenue, to 5,060±~ along the <br />South Platte River on the north. The only area of substantial <br />higher elevation is the 5± acre area abutting Monaco Street. This <br />area has an average elevation of 5,090±~. The above features and <br />soils are shown on the PRE-MINING PLAN MAP, EXHIBIT C-1B. <br />,i <br />P <br />