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FORT LUPTON PROPERTIES <br />PREBLE'S MEADOW IUMPRJG MOUSE SURVEY <br />northwest of the town of Brighton, west of Highway 85. Weld County Road 6 borders <br />the property to the south, State Highway 52 borders it to the north, the South Platte River <br />borders it to the east, and Weld County Road 23 borders it to the west. <br />UTM coordinates (approximate center): UTM Zone 134434000mN and 514000 <br />mE. <br />Elevation: Average elevation is about 4906 feet above sea level. <br />Soils: Aquolls and Aquents gravel substrate, and Bankard sandy loam (USSCS 1980). <br />Hydrology: Big Dry Creek, several small ditches, and the South Platte River run <br />through the properties. <br />Project Description <br />The proposed project consists of the potential excavation of the sand and gravel <br />resources on portions of the properties within the study area. <br />Methods <br />ERO conducted the trapping survey using the methods outlined in the U.S. Fish and <br />Wildlife Service's Preble's Meadow Jumping Mouse Survey Guidelines, revised April <br />2004. A total of 1,325 trap nights were completed over 4 nights from June 14 through <br />June l9, 2004, with 325 to 350 traps being set each night. Eive trapping areas were <br />defined: Groups 2 and 5 were located along the riparian corridors of Big Dry Creek; <br />Groups l and 4 were placed along the riparian vegetation of the South Platte River; and <br />Group 3 was located along an irrigation ditch that runs through the properties (Figure 2). <br />Table 1 lists exact locations for each group. Traps were spaced at l0-meter intervals with <br />increased trap density in the best available habitat. All trap lines were set up along stands <br />of willows, riparian understory, and herbaceous habitat that bordered the water sources. <br />