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HULL SEEP -CAMAS WETLAND~MEATION REPORT SITE DESCRIPTION The Cooley Gravel Site is located in Adams County, Colorado straddling the South Platte River. The site occupies portions of three sections, 16,17,and 9 of Township 2 South, Range 67 West. The section comers meet at approximately 39° 53' I S" Latitude and I04° 53'0" Longitude, UTM (5083som.E. 4114soom.N.). METHODOLOGY Field investigations were conducted to delineate existing wetlands in the project area. A routine survey was done in accordance with guidelines developed by the Department of the Army, Corps of Engineers in the 1987 publication titled: Coros of Engineers Wetlands Delineation Manual (Department of the Army, 1987). The presence and composition of hydrophytic vegetation was determined in the field. Soils were examined for hydric chazacteristics using soil core sampling methods. The presence of hydrologic chazacteristics supporting existing wetlands was made by visual observation. WETLAND COMMUNITY DESCRIPTIONS Wetlands in this survey have bee divided into five azeas for the purpose of discussion (Drawing 1). Areas adjacent to the South Platte River were excluded from this survey because no potential disturbance has been proposed for these areas. Area I This site is located at the end of 100`h avenue neaz the Fulton Ditch headgate station. A hill with a northwest aspect slopes to a fenced pasture, which is relatively level before dropping into the Spring Creek Ditch. Most of this flat pasture azea is a wet meadow dominated by three square (Shoenoplecrus americanus). Hydric grasses aze mixed with water sedge (Carex aquatilus) and field sedge (C. microptera) in this area but heavy grazing made complete identification impractical. The soil has a saturated surface layer high in organic content. White mineral deposits have accumulated on the soil surface and vegetation, caused by evaporation of shallow surface pools. A thick layer of clay slows percolation of surface water into the saturated gravel layer below. It is this gravel layer that conveys ground water to the seeps that emerge from the slope as the pasture drops into the ditch. The seeps are vegetated mainly with cattail (Typha lotlfolio), open azeas of muck soil are dominated by water cress (Nasturtium o~cinale). Ditches on both sides of 100°i avenue have hydric vegetation and drain into Spring Creek Ditch, which then empties into Fulton ditch north of the road. A shallow open water pond just south of the road and east of the pasture area connects to the ditch network. Sections 16, l7, and 9 of Township 2 South, Range 67 West. / 39° 53' l5" Latitude and 104° 53'50" Longitude, UTM ('08i70ni E. 1° 14°00"''N.).