WSP06426 - Laserfiche WebLink

Home Browse Search

l;jJ'I~2 HYDROLOGIC DATA FROM UPPER GRANGE HALL CREEK BASIN, rlORTHGLENN. ADAMS COUNTY. COLORADO By Dennis C. Hall and A. C. Duncan ABSTRACT Hydrologic data collected in the Upper Grange Hall Creek basin from October 1977 to October 1979 as part of a water-resources investigation are presented in this report. land use in the basin is predominantly single-fami ly residences, commercial properties, and open space. Data presented in tabular form consist of: (1) Estimated dai Iy precipitation at one site (April through October, 1978 and 1979); (2) mean daily streamflD\.J at twO sites (December 1977 through September 1979); (3) instantaneous streamflow at 2 sites along Grange Hall Creek and cor- responding cumulative rainfall at 1 to 3 sites for 17 storms (April 1, 1978, to August 26, 1979); (4) concentrations of selected major ions, fecal-coliform bac- teria, suspended sediment, nutrients, and trace elements at five sites during dry- weather flow, at three sites during rainfall runoff, and at five sites during snOV/lTlelt runoff; and (5) concentrations of pesticides and polychlorinated bi- phenyls (PCB's) at two sites during dry-weather flow and rainfall runoff. I NTP-DDUCT I DN The city of Northglenn (fig. 1) and the Farmers Reservoir and Irrigation Co. (FRICD) are entering a new e..a of water sharing. FRICD is to supply Northglenn with \-Jater from Standley Lake for municipal use; in return, Northglenn will pro- vide FRieD with treated municipal-waste water and storm runoff from Grange Hall Creek for agricultural use. In order to implement the water-sharing project, the quantity and quality of runoff from Grange Hall Creek basin, which is to be col- lected and stored in a proposed reservoir, need to be determined. To provide the needed information, the U.S. Geological Survey, in cooperation with the city of Northglenn, collected hydrologic data from October 1977 to Octo- ber 1979. Two continuously recording streamflow-gaging stations, and four ~ ping-bucket rain 9ages were installed in the basin (fig. 2). A storage rain ~ installed for a previous study also was operated. Samples for water-quality analy- sis were automatically or manually collected at five sites (fig. 2). The data were specifically collected for use in evaluating the amount and quality of runoff from Grange Hal I Creek as part of the Northglenn Water Management Program, and were not primarily collected to be used in hydrologic modeling. Special thanks are extended to Jack DeBelle and Susan Ackerman, of the North- glenn Department of Publ ic \/orks. and to the personnel of the Northglenn Depart- ments of Parks and Engineering, who assisted with the installation of the stations and collection of the data.