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Aggregate Industries, Morrison Quarry <br /> Amendment No.7 to Permit M-1973-021 FYZ <br /> Morrison,CO <br /> Item 12.0 Maintenance and Weed Control <br /> The primary management practice to be followed after hydroseeding and manual transplanting <br /> of trees and shrubs will be yearly monitoring for success of the reclamation effort. This will <br /> include observing the stability of all backfilled and sloped areas as well as the sustained growth <br /> of grasses, shrubs, and trees. Experience has shown that it takes a minimum of 3 years to get <br /> native grasses permanently established. However, once established, a varied and successful <br /> native grass mixture will result. During this period, occasional selective herbicide treatment may <br /> be necessary where pockets of noxious or undesirable weeds have established themselves. <br /> Past experience has shown that if dense pockets of weeds are controlled, native grasses easily <br /> out compete weeds if, in the first few years, the grasses are allowed to establish themselves. <br /> Areas reclaimed in the North and Central Quarries have shown successful regenerative and <br /> sustained growth of all grasses, shrubs, and trees that have been planted. Some trees and <br /> shrubs have been replaced but, in general, reclamation has been very successful and will help <br /> to support establishment of viable wildlife habitat in areas surrounding the existing water <br /> resource storage Reservoir Site II. <br /> September 2021 1 38 <br />