Computer Terrain Mapping, Inc. 2005 map The Alpine Loop environmental constraints data set shows areas with environmental concerns along the Loop. This data set is one of the development constraints used to determine Development Potential. For this map, we combined the EPA's industrial facility discharge sites, permit compliance sites, Resource Conservation and Recovery Act (RCRA) solid and toxic waste sites, 303b streams and abandoned mine inventories from the BLM, USGS/BLM in the Upper Animas drainage and adits and tailings sites on U.S. Forest Service land from the Colorado Geological Society. The Alpine Loop Spatial Analysis and Mapping Project inventoried natural and cultural resources and identified important areas where overlapping resources occur. The results from this project will provide an opportunity for area stakeholders - landowners, outdoor enthusiasts, surrounding communities, federal government agencies and local and national preservation groups - to come together to find solutions that maintain the Alpine Loop experience for future visitors and residents, while working within the framework of landowner objectives as well as local and federal government goals. The Alpine Loop Spatial Analysis and Mapping Project analyzed the Alpine Loop landscape, considering important natural and cultural resources along with the likelihood of development based upon building constraints. The Project aims to provide a planning tool for area stakeholders as they consider the variety of land management options and the future of this magnificent region. The next logical step will be to craft solutions that work within the framework of landowner desires, local and federal government land management goals, and available financial and technical resources to manage the area in a way that preserves the Alpine Loop experience for future generations. While the Alpine Loop lies within three counties - San Juan, Hinsdale and Ouray - the analytical work extended into a portion of San Miguel County. The resulting mapping and analyses will: 1. Create a spatial foundation to aid future projects in the Alpine Loop corridor; 2. Serve as a prioritization tool for evaluating the conservation potential of individual private parcels; 3. Provide the necessary framework for pursuing future funding opportunities. 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. See Data Quality Information for time information for source data. Complete None Planned -107.8725478 -107.2256611 38.08819806 37.73515861 None Conservation Development Environmental None United States North America Colorado San Juan Mountains Ouray County San Juan County Hinsdale County San Miguel County Ouray Silverton Lake City None None. Computer Terrain Mapping, Inc. Ed Russell President mailing

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Boulder CO 80306 USA 303.444.1670 303.443.4856 ctm@ctmap.com 8:00-5:00 MT This data set is the product of a collaborative process between numerous agencies, organizations and interested individuals from the beautiful Alpine Loop region. GRASS version 5 on Red-Hat Linux version 8.0 exported to an ASCII Grid Environmental constraints were determined from a variety of data sources of unknown accuracy. Data are calculated from a variety of data sources of unknown accuracy. Only basic spot checking based on knowledge of terrain was performed. Environmental constraints were calculated for the entire study area. U.S. Environmental Protection Agency/Office of Water/OST 19980801 Washington, D.C. U.S. Environmental Protection Agency Digital data (shapefiles) were provided on a CD for the Colorado Watershed Partnership GIS Mapping Project, a project of TREES, WATER & PEOPLE. Data was clipped to the state of Colorado from its original extent. EPA is an abbreviation for the U.S. Environmental Protection Agency. CONUS is an abbreviation for Conterminous United States of America. For BASINS model and data http://www.epa.gov/ost/basins For STORET system and data http://www.epa.gov/owow/storet digital data 1978 1994 April 1997 EPA Industrial Facilities Discharge Locations of industrial discharge into surface waters. U.S. Environmental Protection Agency/Office of Water/OST 20010330 Washington, D.C. U.S. Environmental Protection Agency Digital data (shapefiles) were provided on a CD for the Colorado Watershed Partnership GIS Mapping Project, a project of TREES, WATER & PEOPLE. Data was clipped to the state of Colorado from its original extent. EPA is an abbreviation for the U.S. Environmental Protection Agency. CONUS is an abbreviation for Conterminous United States of America. For BASINS model and data <http://www.epa.gov/ost/basins> For further documentation and information on PCS <http://www.epa.gov/owmitnet/pcsguide.htm> For PCS data <http://www.epa.gov/enviro/html/pcs/pcs_overview.html> digital data 1990 1999 Publication Date EPA Permit Compliance Locations were permits have been issued allowing discharge of wastewater into navigable waters. U.S. Environmental Protection Agency/Office of Water/OST 19980801 Washington, D.C. U.S. Environmental Protection Agency Digital data (shapefiles) were provided on a CD for the Colorado Watershed Partnership GIS Mapping Project, a project of TREES, WATER & PEOPLE. Data were clipped to the state of Colorado from their original extent. EPA is an abbreviation for the U.S. Environmental Protection Agency. RCRA is an abbreviation for the Resource Conservation and Recovery Act. For BASINS model and data http://www.epa.gov/ost/basins For further documentation and information on RCRIS http://www.epa.gov/osw For RCRIS data queries http://www.epa.gov/enviro/html/rcris/rcris_overview.html digital data 1983 199712 Publication Date EPA RCRA Solid and Toxic Waste Information about generators, transporters, treaters, storers, and disposers of hazardous waste. U.S. Environmental Protection Agency/Office of Water/OST 2000 map Washington, D.C. U.S. Environmental Protection Agency Digital data (shapefiles) were provided on a CD for the Colorado Watershed Partnership GIS Mapping Project, a project of TREES, WATER & PEOPLE. Data was clipped to the state of Colorado from its original extent. EPA is an abbreviation for the U.S. Environmental Protection Agency. No original metadata was available digital data 2000 Title EPA 303d Streams Locations where beneficial uses of the water - such as for drinking, recreation, aquatic habitat, and industrial use - are impaired by pollutants. Colorado Geological Survey 19990530 map Denver, CO Colorado Geological Survey Abandoned mine inventory data gathered by the Colorado Geological Survey on behalf of the U.S. Forest Service Rocky Mountain Regional Office. Multiple files for various features (holes, tailing piles, etc.) by ranger district. digital data 19990530 Publication Date Abandoned Mine Location of mines, holes, tailings, etc. U.S. Geological Survey 2001 map Denver, CO USGS Abandoned mine inventory data. digital data 1997 2001 Publication Date Abandoned Mine Location of mines, etc. BLM (Barbara Hite) 2004 map Denver, CO BLM Abandoned mine inventory data. digital data 2004 Publication Date Abandoned Mine Location of mines, etc. Categorized as follows: EPA RCRAs and 303b streams - 3; EPA PCAs - 2; all others - 1. All constraints are summed are ranked as 3 - high; 2 - medium; 1 - low; 0 - no environmental constraint present. BLM 2004 Raster Grid Cell 1256 1863 Universal Transverse Mercator 13 .9996 -105 00 00 00 00 00 500000 0 coordinate pair 30.0 30.0 METERS North American Datum of 1983 (NAD83) GRS 1980 6378137 298.257222101 Environmental constraint grid cell Any of the data elements in the environmental constraint map author Environmental constraint cell value The value describes the constraint due to environmental hazards. 3: high constraint; 2 - medium; 1 - low; 0 - no constraint mapped. author 0 3 Computer Terrain Mapping, Inc. Ed Russell President mailing

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Boulder CO 80306 USA 303.444.1670 303.443.4856 ctm@ctmap.com Alpine Loop Spatial Analysis and Mapping Project Computer Terrain Mapping, Inc. (CTM) provides this data set as is. CTM makes no guarantee or warranty concerning the accuracy of information contained in the data. CTM further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although this data has been processed successfully on computers at CTM, no warranty, expressed or implied, is made by the CTM regarding the use of this data on any other system, nor does the fact of distribution constitute or imply any such warranty. Contact distributor to receive additional copies. 200504 Computer Terrain Mapping, Inc. Ed Russell President mailing

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Boulder CO 80306 USA 303.444.1670 303.443.4856 ctm@ctmap.com 8:00-5:00 MT FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998