2004-11-09_REVISION - M2000016 (11)

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INTRODUCTION This report presents the results of wetland delineation studies conducted at ten sites in the vicinity of the South Platte River near Ft. Lupton, Colorado. The sites (Table 1) are located southwest of Ft. Lupton and extend for a distance of approximately three miles on the west side of the South Platte River. They occur in parts of Township 1 North Range 66 West, Sections 7, 18 and 19; and in parts of Township 1 North, Range 67 West, Sections 1, 12, 13 and 24 (Maps 1 and 2). Table 1. Site names, eeneral locations and maior drainages for the evaluated urouerties. Site Name General Location of Site Location Map Major Drainages Reference on the Site Rittenhouse T 1 N, R 66 W, southwest Map 2 South Platte River and art of Section 19 Irri ation Ditch McWilliams T 1 N, R 66 W, northwest Map 2 South Platte River and art of Section 19 Irri ation Ditch Norden T 1 N, R 67 W, northeast Map 2 Tributary to Big Dry Creek art of Section 24 and wetland draina e Anderson T 1 N, R 66 W, southwest Map 2 South Platte River art of Section 1S T 1 N, R 66 W, northwest South Platte River, Big Dry Chikuma part of Section 18 and Map 2 Creek, Tributary to Big T 1 N, R 67 W, north half Dry Creek and Irrigation of Section 13 Ditches Myrna T 1 N, R 67 W, south- Map 2 Big Dry Creek central art of Section 12 T 1 N, R 66 W, southwest part of Section 7 and Map 2 South Platte River T 1 N, R 67 W, southeast and Big Dry Creek art of Section 12 D& S Mining T 1 N, R 67 W, north Map 1 Irrigation Ditches central art of Section 12 T 1 N, R 67 W, western part of the southeast Map 1 Irrigation Ditches uarter of Section 1 MFM Farms T 1 N, R 67 W, cenfral Map 1 None portions of Section 12 Surface drainages within the study area consist of the South Platte River which mostly forms the eastern boundary of the study area. Five of the properties, at least in part, are crossed by the South Platte River. The second major drainage in the area is Big Dry Creek, which enters the area from the southwest and crosses three of the properties. The third major drainage is a tributary to Big Dry Creek, which enters the area from the south and crosses two of the properties. This tributary carries natural run off from upland areas south of the project site, and also augmented by water diverted from the South Platte River (the diversion point is located on the Rittenhouse property). In addition to these natural drainages, several major irrigation distribution ditches and numerous irrigation laterals cross the properties. -1-