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<br />002883 <br /> <br />TABLE C-O. <br /> <br />DISPERSION CONSTRAINT <br /> <br />Species <br />Ponderosa Pine <br />Lodgepole Pine <br />Spruce-Fir <br />Aspen <br /> <br />Modification VQO <br />12.00~ <br />6.00~ <br />6.00~ <br />25.00~ <br /> <br />Partial Retention VQO <br />8.00~ <br />II.OO~ <br />1I.00~ <br />10.00~ <br /> <br />5. Lands classified as not suited - No commercial timber harvest will be <br />scheduled on lands unless they have been identified as tentatively suitable <br />for timber production. Not-suited lands include those with less than 10 <br />percent forest tree cover, lands with a high probability of irreversible <br />damage, lands where regeneration would take in excess of 5 years after <br />harvest, and lands withdrawn from timber production (e.g., Wilderness <br />Areas, and Research Natural Areas). <br /> <br />6. Wildlife and fish - All indicator species were evaluated for habitat <br />requirements estimated to be necessary to maintain populations. The <br />following is how elk and deer were modeled in FORPLAN. <br /> <br />Big Game Winter Range Needed for Minimum Viable Populations - A <br />constraint was applied so that the maximum amount of vegetation that <br />could be regenerated in oakbrush, pinyon-juniper, and sagebrush would <br />not exceed 25 percent of the analysis area in a given decade. Forest <br />Direction (Plan Chapter III, page 111-311) states that no more than 25 <br />percent of the browse stands within a 10~year period should be <br />altered. <br /> <br />7. Diversity - An old growth constraint was applied to maintain diversity. <br />Forest Direction (Plan Chapter III) is to maintain structural diversity <br />with 5 percent or more of the forested area in old growth condition <br />(Regional Guide, p. 3-48). <br /> <br />8. Soil and water - Costs associated with soil and water protection were <br />included in all prescriptions. The dispersion constraints are also used to <br />prevent excessive sediment production. Additionally, forest-wide soil and <br />water standards and guidelines (Plan, Chapter III) give direction which <br />ensures that the Forest will meet minimum management requirements. The <br />following summarizes key standards and guidelines. <br /> <br />In Riparian Areas (lands typically within 100 feet of streams and 300 feet <br />around wetlands): <br /> <br />a. Maintain all riparian ecosystems in at least an upper mid-seral <br />successional stage based upon the R2 Riparian Ecosystem Rating System. <br /> <br />22 <br />