Water Resources of Colorado

Hydrologic, Water-Quality, Sediment Transport, and Bulk Atmospheric Deposition Data, Guanella Pass Area, Colorado, October 1, 1994, through September 30, 1997

by Michael R. Stevens

Available from the U.S. Geological Survey, Branch of Information Services, Box 25286, Denver Federal Center, Denver, CO 80225, USGS Open-File Report 00-82, 293 p., 3 figs.

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The hydrology and water quality of streams and lakes in the Guanella Pass area could be affected by the proposed reconstruction of the existing road over Guanella Pass between Georgetown and Grant, Colo. Data were collected during water years 1995 through 1997 (October 1, 1994, through September 30, 1997) that describe the preconstruction hydrology, water quality, sediment transport, and bulk atmospheric deposition in the Guanella Pass study area with most data being collected primarily during water years 1996-97. Data were collected at 17 stream sites, 7 road-runoff sites, 10 ground-water sites, 3 lake sites, 1 reservoir site, 2 snow-precipitation sites, and 4 bulk atmospheric-deposition sites. Data include onsite measurements of streamflow, specific conductance, pH, water temperature, turbidity, barometric pressure, and dissolved oxygen; concentrations of major ions, nutrients, and trace elements; organic carbon and trace organic compounds; suspended-sediment concentration and particle-size analyses; field measurement and depth profiles, and chlorophyll concentrations in lakes and reservoirs; trace element, nutrient, and trace organic (semi-volatiles, PCBs, and insecticides) analyses of lake and reservoir bottom sediment; and bulk atmospheric deposition rates of solids. Daily values for streamflow, maximum and minimum water temperature, specific conductance, and suspended sediment were computed at seven streamflow-monitoring stations located along South Clear Creek, Leavenworth Creek, Duck Creek, Geneva Creek, and Deer Creek.

Table of Contents



Purpose and Scope


Description of Study Area

Types of Hydrologic and Water-Quality Data

Methods of Data Collection and Analysis


Continuous Data

Water-Quality Sampling

Road Runoff

Continuous Data

Water-Quality Sampling

Ground-Water Sampling

Lake and Reservoir Sampling

Snow Sampling

Bulk Atmospheric-Deposition Sampling

Laboratory Analysis

Quality Assurance

References Cited

Hydrologic and Water-Quality Data

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Water Resources of Colorado

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