Title: Bathymetry of Clear Creek Reservoir, Chaffee County, Colorado, 2016 Prepared in cooperation with the Pueblo Board of Water Works and Colorado Mountain College By Michael S. Kohn, Paul J. Kinzel, and Jacob S. Mohrmann 2017 U.S. Geological Survey Scientific Investigations Map 3375 U.S. Geological Survey data release ABSTRACT: To better characterize the water supply capacity of Clear Creek Reservoir, Chaffee County, Colorado, the U.S. Geological Survey, in cooperation with the Pueblo Board of Water Works and Colorado Mountain College, carried out a bathymetry survey of Clear Creek Reservoir. A bathymetry map of the reservoir is presented here with the elevation-surface area and the elevation-volume relations. The bathymetry survey was carried out June 6–9, 2016, using a man-operated boat-mounted, multibeam echo sounder integrated with a Global Positioning System and a terrestrial survey using real-time kinematic Global Navigation Satellite Systems. The two collected datasets were merged and imported into geographic information system software. The equipment and methods used in this study allowed water-resource managers to maintain typical reservoir operations, eliminating the need to empty the reservoir to carry out the survey. DISCLAIMERS: Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. Although this information product, for the most part, is in the public domain, it also may contain copyrighted material as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. This database, identified as SIM 3375, has been approved for release by the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty, expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. REPORT FILES: The map for this report is located at and can be downloaded via the Web from at the U.S. Geological Survey publications website at https://doi.org/10.3133/sim3375 List of files: 00ReadMe.txt sim3375.pdf DATA RELEASE FILES The data release for this report is located at and can be downloaded via the Web from ScienceBase at https://doi.org/10.5066/F7R49P0H 00Readme.txt Clear_Creek_Reservoir_Bathymetry_DEM.gdb.zip Clear_Creek_Reservoir_Bathymetry_DEM_Metadata.xml HOW TO OBTAIN THE DIGITAL MAP AND PAMPHLET FILES: The map sheet can be obtained via the Internet from the U.S. Geological Survey publications website. Go to the web page at https://doi.org/10.3133/sim3375/ and follow the directions to download the files. The map product is a Portable Document Format (.pdf) map, which requires Adobe Acrobat for viewing. The Portable Document Format (PDF) file can be downloaded, from which paper copies may be printed. Acrobat software runs on a variety of systems, and is available for download free of charge from Adobe at http://www.adobe.com. Suggested citation: Kohn, M.S., Kinzel, P.J., and Mohrmann, J.S., 2017, Bathymetry of Clear Creek Reservoir, Chaffee County, Colorado, 2016: U.S. Geological Survey Scientific Investigations Map 3375, https://doi.org/10.3133/sim3375. HOW TO OBTAIN THE DIGITAL GIS FILES: The digital GIS files constituting the geologic data release for this report can be obtained from the U.S. Geological Survey via the Internet from ScienceBase at: https://doi.org/10.5066/F7R49P0H. Suggested citation: Kohn, M.S., 2017, Gridded bathymetry of Clear Creek Reservoir, Chaffee County, Colorado, 2016: U.S. Geological Survey data release, https://doi.org/10.5066/F7R49P0H. ArcReader may be downloaded free of charge from http://www.esri.com/software/arcgis/arcreader/download for viewing data files included in this report. These maps are offered as an online-only, digital publication. Users should be aware that, because of differences in rendering processes and pixel resolution, some slight distortion of scale may occur when viewing it on a computer screen or when printing it on an electronic plotter, even when it is viewed or printed at its intended publication scale.