Computer Terrain Mapping, Inc. 2005 map The Alpine Loop Development Potential data set shows the risk of avalanche on lands along the Loop. This data set along with the Conservation Resource Value is used to determine the Landscape-Based Conservation Priorities. Development potential combines general development constraints that detract from the "buildability" of a parcel. General development constraints included in the analysis are steep slopes, geologic hazards, avalanche hazard, proximity to existing roads (to access a property), floodplains, environmental constraints and wildfire hazard. 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 Resources Development Avalanche 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. Development potential was derived from a number of data sources of varying accuracy. The accuracy of many of the underlying data sources is not known. Data are calculated from a variety of data sources of unknown accuracy. Only basic spot checking based on knowledge of terrain was performed. Development potential was calculated for the entire study area. Computer Terrain Mapping, Inc. 2005 Map digital 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. Steep Slopes Restriction of development potential due to steep slopes. Computer Terrain Mapping, Inc. 2005 Map digital 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. Avalanche Hazard Restriction of development potential due to avalanche hazard. Computer Terrain Mapping, Inc. 2005 Map digital 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. Geologic Hazards Restriction of development potential due to geologic hazard. Computer Terrain Mapping, Inc. 2005 Map digital 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. Proximity to Roads Restriction of development potential due to distance from roads. Computer Terrain Mapping, Inc. 2005 Map digital 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. Floodplains Restriction of development potential due to floodplains. Computer Terrain Mapping, Inc. 2005 Map digital 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. Wildfire Hazard Restriction of development potential due to wildfire hazard. Computer Terrain Mapping, Inc. 2005 Mapraints digital 2003 2005 Data were retrieved from various sources and analyzed between 2003 and 2005. Environmental Constraints Restriction of development potential due to environmental constraints. Add source values (General constraints: Steep Slopes, Avalanche Hazard, Geologic Hazard, Proximity to Roads, Floodplains, Wildfire Hazard, Environmental Constraints. Reorder so that the areas with the highest number of constraints get the lowest valuesi for development potential. Steep Slopes Avalanche Hazard Geologic Hazard Proximity to Roads Floodplains Wildfire Hazard Environmental Constraints 2005 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 Development potential grid cell Any of the data elements in the development potential file. author Development potential grid cell value The value provides an estimate of the development potential of a location based upon physical constraints at that locale. Development potential was normalized based on the number of constraints that were validly mapped at that locale (differentiating no hazard from no data). The normalized development potential had a potential range of 0 to 3 (since each constraints was typically classified in the 0 to 3 range). This normalized value was then "stretched" by a factor of ten and converted to integer. author 0 27 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