U.S. Geological Survey Open-File Report 03-152 Title-- Geochemical data for stream sediment and surface water samples from Panther Creek, the Middle Fork of the Salmon River, and the Main Salmon River, collected before and after the Clear Creek, Little Pistol, and Shellrock wildfires of 2000 in central Idaho Authors-- Robert G. Eppinger, Paul H. Briggs, Betsy Rieffenberger, Carol Van Dorn, Zoe Ann Brown, James G. Crock, P.H. Hageman, Allen Meier, S.J. Sutley, Peter M. Theodorakos, and Stephen A. Wilson Note-- This report supercedes U.S. Geological Survey Open-File Report 01-0161. Brief Description-- In 1996, the U.S. Geological Survey conducted a reconnaissance baseline geochemical study in central Idaho. The purpose of the baseline study was to establish a "geochemical snapshot" of the area, as a datum for monitoring future change in the geochemical landscape, whether natural or human-induced. In the summer of 2000, there were numerous large wildfires in central Idaho. In particular, the Clear Creek (206,000 acres; 83,370 hectares), Little Pistol (74,000 acres; 29,950 hectares), and Shellrock (64,000 acres; 25,900 hectares) fires swept across much of the area that was sampled. In 2001, ten months after the wildfires, the entire area was resampled by occupying and recollecting at the same sample sites initially sampled in 1996. This work was done and the request of the U.S. Forest Service, Salmon-Challis National Forest. This report presents the methodology, analytical results, and sample descriptions for water, sediment, and heavy-mineral concentrate samples collected in the 1996 pre-wildfire and 2001 post-wildfire sampling periods. Also presented are digital images of the 2001 post-wildfire sample sites. System Requirements-- WINDOWS Intel Pentium or 100%-compatible processor Microsoft Windows ME, Windows 2000, Windows XP, Windows NT4.0 with Service Pack 5 or later, Windows 98 Second Edition, or Windows 95 Service release 2 (OSR 2) 64 MB RAM 24 MB of available hard drive space for installation CD-ROM drive MAC OS Power PC processor Mac OS 8.6*, 9.04, 9.1, or OS X* 64 MB RAM 24 MB of available hard drive space for installation CD-ROM drive Software Installation-- The report (OFR 03-152.PDF) and associated figures are Adobe Acrobat PDF format. View or print the report and figures with version 5 or later of the program Adobe Acrobat Reader; a program for installing Acrobat Reader is located in the Acrobat Reader 5 Inataller folder. After Acrobat Reader is installed, double-click on the OFR 03-152.PDF icon to load Reader and open the report. Refer to the built-in help system in Reader for assistance with commands. Contents of This Report-- There are 4 directories (folders) containing data associated with the report OFR 03-152.PDF. The directories and their contents are: Directory: FIGURES Contents: location figures referred to in OFR 03-152.PDF file, all in .PDF format Files: FIGURE1.PDF general location figure of study area FIGURE2.PDF more detailed location figure with sample sites Directory: ACCESS Contents: analytical data as integrated Microsoft Access 2000 database Files: DATA.MDB Directory: EXCEL Contents: analytical data as individual Microsoft Excel files (version 3.0) Files: SAMPLOG.XLS Listing of all sample sites and media collected at each site SITEINFO.XLS Information related to the sample site WATSITEI.XLS Information related to water sample sites WATANI.XLS Anion analyses, filtered/unacidified water samples WATCATFA.XLS Cation analyses, filtered/acidified water samples WATCATRA.XLS Cation analyses, raw unfiltered/acidified water samples WATHG.XLS Mercury analyses, filtered/preserved water samples WATFE2+.XLS Fe2+ analyses, filtered/acidified water samples WATALK,XLS alkalinity analyses, unfiltered/unacidified water samples HMCONC.XLS Heavy-mineral concentrate descriptive and analytical data SEDIMENT.XLS Sediment descriptive and analytical data WILDFIRE.XLS Wildfire information and sorting codes Directory: PHOTOS Contents: digital images of the 2001 sample sites as .PDF files Files: Filenames are the same as the sample site ID numbers with .PDF extensions. 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