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w <br /> y � r <br /> EXHIBIT J <br /> Vegetation Information <br /> A Biological Resources Inventory Report, February 2019 was prepared for the project area by Tetra Tech. The <br /> complete study is included in Exhibit H. The field survey identified 47 species of native and introduced plants within <br /> the Project area. Seven main cover types were observed during the field survey: forested riparian floodplain, mowed <br /> grassland, fallow corn field, invasive annual grassland, invasive annual/biannual forb land, and riparian/herbaceous <br /> wetland. Shortgrass and prairie would be the dominant native ecosystem type in the Project area under natural <br /> conditions, which were not observed during the field survey. <br /> Four List B Noxious Weed species were identified in the Project area and two List C noxious weeds were identified. <br /> Adams County has listed Russian Olive and Musk Thistle for eradication by 2022. Downy Brome, in particular, was <br /> observed in several large dense patches. Tetra Tech recommends consultation with the Adams County noxious <br /> weed coordinator to determine requirements for control of noxious weeds prior to construction. The severely <br /> degraded riparian area along South Platte River is overrun by invasive species such as Crack Willows, Siberian Elm, <br /> and Russian Olive trees that inhibit native Willow and Cottonwood growth. <br /> Noxious Weed Species Observed During Field Surveys <br /> Weed List(A, <br /> B.or C)' Common Name Scientific Name State Management Policy <br /> List.A Weeds None observed. — — <br /> List B Weeds Scotch cottonthistle Cnopordum acanthwm Contain:Figure 20.01 <br /> Russian-alive Eiaeagnus angustrfo'ia Eliminate by 2022 <br /> Musk thistle Carduus outans Eliminate by 2022 <br /> Russian knapweed icroprion repens Contain:Figure 14.01 <br /> List C'VVeeds Downy brume 3.romus tectomn? Control up to landowners discretion <br /> Field bindweed onvdvulus afvens'-s Control up to landowners'discretior, <br /> Source:CDA(2017b) <br /> 1 List B:the state of Colorado and Adams County have developed noxious weed management plans to stop the continued spread of these <br /> species.Figure numbers refer to containment maps included in the 2015 Noxious'Need Act—Rules and Regulati•or Containment Figures <br /> by Counties(CDA 2017b. <br /> -ist C widespread and well-established noxious weed species for which control is recommended but not required by the state <br /> Following mining, disturbed areas will be seeded with a mixture of upland grass species and a weed management <br /> plan will be implemented. Revegetation with native grasses and the weed management plan will help minimize the <br /> weedy vegetation that typically degrades wildlife habitat. <br /> Please refer to the attached Tucson South Sand and Gravel Mine Project—Adams County, Colorado Biological <br /> Resources Inventory Report September 2018, prepared by Tetra Tech. Specific details and recommendations <br /> regarding vegetation and wildlife are outlined in the report. The conclusions and recommendations regarding <br /> vegetation are included below. <br /> Aggregate Industries Tucson South Resource <br /> Permit#M-2004-044 112 Permit Amendment <br /> Page J-1 <br />