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0 <br />Tree Mortality: provides <br />an indication of the 2006 <br />current level of impact. ??°??F??? <br />GIS coverage from the -- ' r „ <br />Colorado State Forest <br />Service aerial surveys of ---' <br />beetle activity provide a <br />clear indication of where <br />the greatest risk for <br />increased fire potential, - <br />and other possible beetle- _ <br />, - ' <br />kill hydrologic impacts ,7=-M° =t:-- <br />; <br />and effects to the <br />environment. <br />• °A??^??. <br />?; s Y n • ? ^'+?..?,, <br />Y <br />Gax <br />. , ? <br />0 ^} a ? <br />d <br />w....' o....,? <br />sp.?e HEY4AJyd? <br />MYUnh?n G 1t ftf CCi A 4W S? <br />xt HM,(NC?p[ri.1PN9d? RAr?F <br />?monai Nxw:aan?c? <br />Swnb <br />xa<? ? <br />• Susceptibility: The U.S. <br />and Colorado state forest Tree Mortality in 2006 <br />(Provided by the Colorado State Forest Service) <br />services have information <br />regarding stand diameters. <br />This value has been used <br />as an indication of •' ; ° g 0'? <br />infestation susceptibility. 4,t <br />For example, if there are a <br />?r <br />lot of large trees in a€ ?,, <br />stand there is .;??? ?•?? ?',?? °?w <br />considerably more risk of <br />infestation. The figure <br />provides current ,_ • ?. ?, <br />infestation, and shows, by <br />?. <br />tree type, the areas with <br />larger trees. This figure -. • , N?#:? ?,' ? w?? <br />provides an example of a <br />map that could be used to Susceptibility to Mountain Pine Beetle Infestation <br />help identify current areas (Provided by the United States Forest Service, White River <br />of concern and also National Forest) <br />suggests the areas where <br />future attacks are likely to occur, e.g., areas in proximity to existing infestation <br />and/or having larger trees. <br />• Slope: GIS coverage of slope in a watershed serving a water supply system can <br />provide significant insight to wildfre risk and the potential for erosion. Erosion as a <br />function of slope will be a factor in the following circumstances, in order of <br />importance <br />1) Wildfire <br />2) Aggressive thinning or clear cutting <br />3) Selective, low-impact thinning <br />4) Prescribed burn <br /> <br />.? <br />P: ISSP1122 CWCBIDocumentslDraftActionPlanlHandoutJ'ormatlActionPlan_v02.doc <br />Page 5 of 6