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Aggregate Industries, Morrison Quarry Amendment No. 7 to Permit M-1973-021 Morrison, CO October 2021 | 41 are those that have been previously approved in the existing permit and amendments, and that are currently providing successful reclamation in the North and Central Quarries. Irrigation practices will be at the discretion of the operator, but with the goal of an approximately 70% survival rate of trees and shrubs. To provide habitat variability along the reclaimed benches, additional woody debris and rock structures are to be placed along benches as shown in Exhibit F.6. These structures include: • Free standing snags • Habitat root wad • Brush log piles • Rock piles Item 12.0 Maintenance and Weed Control The primary management practice to be followed after hydroseeding and manual transplanting of trees and shrubs will be yearly monitoring for success of the reclamation effort. This will include observing the stability of all backfilled and sloped areas as well as the sustained growth of grasses, shrubs, and trees. Experience has shown that it takes a minimum of 3 years to get native grasses permanently established. However, once established, a varied and successful native grass mixture will result. During this period, occasional selective herbicide treatment may be necessary where pockets of noxious or undesirable weeds have established themselves. Past experience has shown that if dense pockets of weeds are controlled, native grasses easily out compete weeds if, in the first few years, the grasses are allowed to establish themselves. Areas reclaimed in the North and Central Quarries have shown successful regenerative and sustained growth of all grasses, shrubs, and trees that have been planted. Some trees and shrubs have been replaced but, in general, reclamation has been very successful and will help to support establishment of viable wildlife habitat in areas surrounding the existing water resource storage Reservoir Site II.