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Vegetation Information Exhibit J <br />The vegetation of the existing Chambers and the Scott Expansion can be divided into the soil <br />groups listed in Exhibit L Primarily, the original Chambers pit was covered with grass <br />species. However, some cottonwood trees and shrubs existed neaz the river. The Scott <br />Expansion primarily was used as irrigated field and grazing. The grazing occurred both in the <br />fields and in the riparian areas including the oxbow. It should also be noted that a large portion <br />of the existing vegetation on the Scott Expansion is considered noxious weeds, such as <br />knapweed and tamarisk. All soiUvegetation boundaries can be seen on Map C-1. The <br />vegetation associated with the soil type areas can be seen below. <br />Dry Rangeland In the undisturbed areas, the perennial vegetation consists of the <br />following species and their approximate corresponding percent of canopy <br />cover: <br />Species % Perennial Cover <br />Sticky-flowered Rabbitbrush 5% <br />Field Pennycress 2% <br />Sumac 2% <br />Reed Canary Grass 4% <br />Tamarisk 2°l0 <br />Cottonwoods 8% <br />Field Horsetail 1 <br />Russia Wildrye 4% <br />Russian Olive 4% <br />Russian Knapweed 15% <br />Four-wing Saltbush 3% <br />Siberian Elm 1% <br />Bull Thistle 2% <br />Blue Mustard 1% <br />Nebraska Sedge 1% <br />Yellow Sweet Clover ] <br />Intermediate Wheatgrass 5% <br />Cattails 2% <br />Streambank Willow I% <br />Inland Saltgrass 6% <br />Total 70% <br />4126104 Page 3-1 <br />