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Pikeview t~uarry Environmental Assessment Page 24 ' <br />No donated growth materials (soils or organic materials) will be accepted that have a <br />high probability of containing weed seed or plant materials that could vegetatively <br />propagate. ' <br />Inspection of revegetated lands will be done on a monthly basis during the months of <br />April through September (see the section "Monitoring" for additional details). During <br />annual quantitative monitoring and monthly weed monitoring, species included on the <br />current Colorado State Weed Lisi will be sought and if found reported and acted upon .as <br />specified below. ' <br />Control of small infestations will be done at the time of discovery. if chemical controls <br />aze required for that species then this control will be done at the first biologically , <br />appropriate time. If physical removal is feasible for an encountered weed species, then, it <br />will be immediately removed upon discovery. <br />L <br />i <br />f <br />i <br />ill b <br />ll <br />d <br />i <br />e contro <br />arge <br />estat <br />ons w <br />us <br />ng a concerted control program appropriate for <br />n <br />e <br />that species. In cases where physical control can be done and the infestation is not too <br />large, volunteers can be recruited to "weed" the area. Where chemical controls are ' <br />necessazy the best approach will be used, but very toxic herbicides will be avoided unless <br />there are no other options available to control that weed. <br /> <br />2.4 Alternative C: Enhanced Reclamation without layback <br />Under Altemative C, the current mining and reclamation operations would continue ' <br />for 5 to 8 years, depending upon the quantity of materials to be extracted and the duration of <br />[he reclamation work. This altemative would involve the same limestone production as <br />under Alternative A and enhanced reclamation would occur in addition to the base <br />reclamation. - <br />This alternative would not allow for the reclamation of steep slopes along the west ' <br />boundary of the quarry. Instead, backfilling materials and topsoil would be accumulated <br />against existing steep slopes to provide relative stabilization. Thus, no federal lands would <br />be affected. <br />The estimated remaining 6 million tons of limestone would be sold throughout the <br />next 5 to 8 years depending on market demand for this material. No additional limestone ' <br />would be produced because of safety issues related to the steep limestone slopes on the west <br />part of the quarry. <br />1 <br />i~ <br />Hydrosphere Resource Consultants, 1002 Walnut Street Suite 200, Boulder, CO 80302 <br />