2021-09-07_REVISION - M1973021 (4)

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Aggregate Industries, Morrison Quarry Amendment No.7 to Permit M-1973-021 FN Morrison,CO fertilizer, tackifier, and seed together in one application. The hydromulch and soil amendments to be combined with the hydroseed mixture includes: • 1 ton/acre hydromulch; • 150 Ibs/acre tackifier; and • 250 Ibs/acre 18-46-0 fertilizer. A substitute for inorganic fertilizer would be to apply 500 to 1,000 Ibs/acre of BIOSOL, an organic soil enhancer, that has been effective at establishing vegetation in other reclaimed areas of the site. The proposed hydroseed mixture per acre is listed in Table E-2. Table E-2. Hydroseed Mi Grass Type Amount/Acres Western Wheat grass, Native 8.0 Ibs/acre Slender Wheat grass 7.0 Ibs/acre Thicks ike Wheat grass 5.0 Ibs/acre Vaughn Sideoats Grama 6.0 Ibs/acre Blue Grama, Native 5.0 Ibs/acre A ar Blue Flax 3.0 Ibs/acre Indian Rice grass 5.0 Ibs/acre Perennial R e rass 2.0 Ibs/acre Hard Fescue 3.0 Ibs/acre Reubens Canada Bluegrass 4.0 Ibs/acre Total 48.0 Ibs/acre '-Amount per acre reported indicates"pure live seed" Shrubs and trees (detailed in Exhibit F.5, Table 2) will be planted where they would be naturally found in this area. For example, Douglas Fir will only be planted in the upper areas of the north- facing slopes of the reclaimed areas after final mining. Upon sustained, regenerative native grass establishment, shrubs and trees that are acclimatized to this area will be manually transplanted from local nursery stock. These will be in the form of containerized or tubeling trees and shrubs. Density of plantings and types to be used 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.5. These structures include: • Free standing snags • Habitat root wad • Brush log piles • Rock piles September 2021 1 37