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~. <br />The purpose of this delineation was to identify and map wetlands and Waters of the <br />~ United States within the site in conjunction with final planning and permitting prior to <br />expansion of the NCC Pit #1 site. Savage and Savage conducted fieldwork March 29 and <br />April 26, 2004. The wetland delineation is depicted on the attached NCC#1 Extension <br />Wetland and Waters of the United States Features Map. A topographic map is also <br />attached that indicates the overall location of origin, and character of the surface water <br />drainage that skirts the west boundary of the site. <br />SITE CIIARA["-'F'RiGTICS <br />Topography and Geomorphic Features <br />The most significant topographic feature neaz the proposed extension site is the South <br />Platte River that is located approximately 0.75 miles east of the site. The NCC #1 <br />extension project slopes very gently to the northeast and is located on the primary alluvial <br />terrace of the South Platte River. A surface water drainage (feature D) starts the west <br />boundary of the site and flows across the northwest comer of the project site. An old <br />railroad grade forms a portion of the east. boundary of the site and bisects the two <br />southern par~ceLc on the property. Features A, B, C, E, and F are topographic depressions. <br />located within the north portion of the site. Features H and I aze surface Swale drainages <br />® located east of the cattail marsh wetland in the southem portion of the site. <br />p. Vegetation <br />Four vegetation communities characteristic of wetlands within the site can be broadly <br />categorized as surface water drainage fringe, depression, cattail -marsh wetland, and <br />surface Swale drainage. The surface water drainage vegetation commmity skirts the west <br />® boundary of the site and crosses the northwest corner of the site. Several small depression <br />"'~ communities and one lazger depression community are located within the north portion of <br />the site. Two surface Swale drainage vegetation communities are located east of the <br />cattail mazsh wetland. <br />Vegetation along the surface water drainage fringe is donnated by reed canarygrass <br />(Phalm~is crrunclinacea) and curly dock (Rtrmex crispus). This vegetation type comprises <br />a narrow linear band averaging three feet wide on either side of the channel, <br />~_ The small depressions (features A, B, C, and E) located within thenorth portion of the site <br />have similar vegetation communities. Vegetation within the depressions is dominated by <br />three-square (Scitpus americmrus), meadow foxtail (Hordeum jubatum), and plains <br />cottomvood (Populus deltoides). <br />--~ <br />NCC Pit?I Extension Junsdietional Wedand Delineation and Determination Page 2 <br />100 <br />