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Rule 2:Permits <br /> Revegetation Success Criteria <br /> Revegetation success will be based on the comparison of revegetated communities to corresponding <br /> unmined reference area communities. LCC will utilize an extended reference area(ERA)approach <br /> comprised of undistributed areas within the intensive vegetation baseline inventory area. Map 2.04.10-1 <br /> shows the disturbed areas superimposed on the vegetation community type map.Designated undisturbed <br /> areas form the ERA for Oak/Pinion and grassland extended reference areas. Potential ERA's for Hay <br /> Meadow vegetation communities are being investigated. The selected area will be indicated in Map <br /> 2.04.10-1 subject to evaluation and landowner consent. <br /> Vegetation measurements will be conducted on revegetated areas and the ERA for at least the last two <br /> years of bonding responsibility. The minimum period of responsibility for reestablishing vegetation will <br /> begin after the last seeding or other activity related to final reclamation unless it can be demonstrated that <br /> such work is a normal husbandry practice. Phase III bond release applications will not be submitted prior <br /> to the end of the tenth growing season from last seeding. <br /> To evaluate revegetation success LCC will collect data from the revegetated area and ERA for <br /> production, cover,species diversity, woody stem density, and utility. Methods for data collection will be <br /> the same as for the 1996 baseline vegetation survey. In addition,wildlife use of reclaimed areas will be <br /> evaluated to demonstrate the establishment of wildlife habitat for post-mining land use. Methods for the <br /> vegetation and wildlife surveys are detailed in Section 2.04.10. <br /> Point-Intercept Cover <br /> Quantitative studies of community composition will employ the widely used point-intercept method.The <br /> technique is efficient and appropriate for plant communities at Lorencito Canyon,suitable for both large <br /> and small mosaics, and objective. At a minimum, fifteen transects will be sampled in each community <br /> type present in each disturbance areas and corresponding reference area or sufficient transects will be <br /> sampled to reach sample adequacy. Vegetative community types occurring within the disturbance areas <br /> will include oak/pinyon pine and grassland'.Transects will be located in homogenous vegetation units. <br /> Ground cover will be evaluated using the Cover-Point Optical Point Projection Devise along each 25- <br /> meter transect by sampling two points approximately one-meter apart for a total of 50-points per transect. <br /> Each sample point will be determined by projecting the ocular sight vertically downward to the sample <br /> location on the transect and recording all"hits"as either litter,rock,bare ground,or vegetation by <br /> species. <br /> Following the data collection at the minimum number of transects, statistics will be run in the field to <br /> determine whether sample adequacy is achieved. Sampling will be complete when sample adequacy is <br /> achieved or when 50 transects have been sampled. Sampled adequacy will be determined using the <br /> Snedecor-Cochran sample adequacy formula. The formula is as follows: <br /> N,,,,n(t2s2)divided by(dx)2 <br /> Where: <br /> N„n,n=the minimum number of observations needed, <br /> 1 No oak/pinyon pine areas were disturbed during mine operations,revegetation criteria will be evaluated for <br /> grassland areas only. <br /> TR-20 2.05-72 2/28/2019 <br />