Computer Terrain Mapping, Inc. 2005 map The Alpine Loop Wildfire Hazard data set shows the risk of wildfire on lands along the Loop. This data set is one of the development constraints used to determine Development Potential. For this project we adapted a new wildfire model from elements of two existing models: the National Fire Protection Association's NFPA 299 rating system (used by the Colorado Office of Emergency Management) and the Idaho Panhandle National Forests Wildfire Hazard-Risk Assessment (see http://jfsp.nifc.gov/conferenceproc/HR-04Harkinsetal.pdf). We further modified the model to include an evaporation submodel. 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 Wildfire 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 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. The entire study area was covered by the analysis. Chris Daly of Oregon State University and George Taylor of the Oregon Climate Service at Oregon State University 199804 Portland, Oregon Water and Climate Center of the Natural Resources Conservation Service PRISM is an abbreviation for Parameter-elevation Regression on Independent Slopes Model. PRISM is an analytical model that uses point data and a digital elevation model (DEM) to generate gridded estimates of annual, monthly and event-based climatic parameters. http://www.ocs.orst.edu/prism/ digital 19610101 19901231 Climatological period from which the point observations were taken. PRISM 30-year average precipitation and average annual temperature data. U.S. Geological Survey (USGS), EROS Data Center 1999 raster digital data Sioux Falls, SD U.S. Geological Survey <http://gisdata.usgs.net/ned/> digital 19990201 Unknown publication date NED Elevation data. U.S. Geological Survey (USGS) 20000507 raster digital data Sioux Falls, SD U.S. Geological Survey NLCD Stands for National Land Cover Database http://edcwww.cr.usgs.gov/programs/lccp/natllandcover.html digital 1988 1993 ground condition NLCD Cover type reclassified to determine fire hazard (based on cover) and disturbance regime (how fast the cover type grows back after fire, indicating the likelihood that the cover has regrown from when it was last burned). Compute 30-year average rainfall from PRISM PRISM 2005 precipitation submodel computed the product of the (normalized) average annual maximum temperature (from PRISM) and the annual relative solar incidence (including shadows) derived from NED PRISM NED 2005 evaporation submodel Compute slope from NED NED 2005 slope gradient submodel Reclassify from NLCD according to how easily the vegetation burns (fuel hazard). Higher values indicate higher flammability. Fuel Hazard from land cover was classified as follows: The following land cover types were given a fuel hazard of 0, indicating fuel hazard is not applicable: Water: Open Water, Water: Perennial Ice/Snow, Barren: Bare Rock/Sand/Clay, Barren: Quarries/Strip Mines/Gravel Pits, Barren: Transitional, Developed: Low Intensity Residential, Developed: High Intensity Residential, Developed: Commercial/Industrial/Transportation, Non-Natural Woody: Orchards/Vineyards/Other, Herbaceous Planted/Cultivated: Row Crops, Herbaceous Planted/Cultivated: Fallow, Herbaceous Planted/Cultivated: Urban/Recreational Grasses. The following land cover types were given a fuel hazard of 1 indicating low fire risk: Wetlands: Woody Wetlands, Wetlands: Emergent Herbaceous Wetlands, Herbaceous Planted/Cultivated: Small Grains. The following land cover types were given a fuel hazard of 2 indicating moderate fire risk: Shrubland: Shrubland, Herbaceous Upland Natural/Semi-Natural Vegetation: Grasslands/Herbaceous, Forested Upland: Deciduous Forest, Forested Upland: Evergreen Forest, Forested Upland: Mixed Forest, Herbaceous Planted/Cultivated: Pasture/Hay. No land cover types were given a fuel hazard of 3 indicating high fire risk. NLCD 2005 fuel hazard submodel reclassify from NLCD according to how quickly the vegetation recovers from fire (disturbance regime). Higher values indicate quicker recovery. Disturbance regime from land cover was classified as follows: The following land cover types were given a disturbance regime value of 0, indicating disturbance regime is not applicable: Water: Open Water, Water: Perennial Ice/Snow, Barren: Bare Rock/Sand/Clay, Barren: Quarries/Strip Mines/Gravel Pits, Barren: Transitional, Developed: Low Intensity Residential, Developed: High Intensity Residential, Developed: Commercial/Industrial/Transportation, Non-Natural Woody: Orchards/Vineyards/Other, Herbaceous Planted/Cultivated: Row Crops, Herbaceous Planted/Cultivated: Small Grains, Herbaceous Planted/Cultivated: Fallow, Herbaceous Planted/Cultivated: Urban/Recreational Grasses. No land cover types were given a disturbance regime value of 1 indicating a long recovery period or a value of 2 indicating a medium recovery period. The following land cover types were given a disturbance regime value of 3 indicating a short recovery period: Shrubland: Shrubland, Herbaceous Upland Natural/Semi-Natural Vegetation: Grasslands/Herbaceous, Wetlands: Woody Wetlands, Wetlands: Emergent Herbaceous Wetlands, Forested Upland: Deciduous Forest, Forested Upland: Evergreen Forest, Forested Upland: Mixed Forest, Herbaceous Planted/Cultivated: Pasture/Hay. NLCD 2005 disturbance regime submodel final wildfire hazard computation: (precipitation submodel) x (evaporation submodel) x (slope gradient submodel) x (fuel hazard submodel) x (disturbance regime submodel) precipitation submodel evaporation submodel slope gradient submodel fuel hazard submodel disturbance regime submodel 2005 wildfire hazard unclassified Reclassified wildfire hazard into three equal interval categories. The reclassified values are 3 (high restriction of development potential due to wildfire hazard) if in the top third of the results, 2 (moderate restriction of development potential due to wildfire hazard) if in the middle third of the results or 1 (low restriction of development potential due to wildfire hazard) if in the bottom third of the results. wildfire hazard classified 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 Wildfire hazard grid cell Any of the data elements in the wildfire hazard map author wildfire hazard cell value Values of 3 (high hazard), 2 (medium hazard), 1 (low hazard), and 0 (no hazard) 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