2004-11-02_REVISION - M1977208 - Laserfiche WebLink

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Erica Crosby Division of Mineral and Geology Page 2 of 4 October 21.2004 ,:; ~ } ;,:-: ~` .~ a ^? ~„ n. ... ~ . ~j~.~ -r.Ei kep-"-- ~}.. ... ~U~m /+b l~`i . A-Pit take {St Vrain-Portland No.1 Reservoir), looking east A-Pit lake (shown above} continues to be used as a reservoir {5t. Vrain-Portland No. t Reservoir, as approved by Water Court Case No. 84CW377}. Due to material quality and mining constraints, the reservoir was completed in a different configuration than that shown in the 1984 TR. Please see the attached Revised Reclamation Plan Map far the current. and final, configuration of the lake. The reservoir is approximately 35.6 acres in size, and has approximately 1,280 feet of highwali on the south side. The remainder of the reservoir edge is reclaimed to approximatety 3:4 slopes. The entire Lyons Quarry site {north of Hygiene Road. also known as CR10) is fenced, and no recreational or public access is aNowed. The non- reservoirportions of A-Pit have been reclaimed to irrigated pasture. Unpaved roads in the A-Pit area will remain for ditch and reservoir access, as Shown on the attached map. In addition, there is a permanent underground pipe system on the west side of A•Pit reservoir that delivers recharge water ftom the 8outder Feeder Canal to the reservoir. A permanent pump and pipe system on the east side of the reservoir is used for removing water for site irrigation and cement plant water needs. Pit B Pit B has been reclaimed to drylartd and irrigated pasture. The unpaved roads along the Boulder Feeder Canal will remain for ditch and site access, as shown on the attached map. Pit C Mining at GPit is complete, and the pit is being used for disposal of Cement Kiln DusE (CKD}. As noted in the Division's Inspection Report, the pit will ultimately be filled and reclaimed to irrigated pasture. The quality aspects of the ponded water at the CKD disposal area are being addressed by Cemex separately.