2010-02-01_REPORT - M1983194 (2)

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Well Pad Site 4-311: The ground cover data in Table 6-12 is summarized by class of vegetation and cover type from data presented by plant species or cover type in Table A4. The production data presented in Table 6-13 is summarized from the annual above-ground vegetation biomass production for each plant species as shown in Table A4. The species composition data presented in Table 6-14 is summarized by class of vegetation from the percent composition of each plant species encountered as determined by each species contribution to total biomass production as shown in Table A4. The following tables compare the data collected in 2009 for well pad site 4-3H to data collected from previous years as well as data collected in 2009 from nearby native rangelands. Table 6-12 - Ground Cover (%) for Well Pad 4-3H, July 2009 2007 2008 2009 Change 2009 Native Similarity w/ 2009 2008 to 2009 Rangeland Native Rangeland Perennial Grass 31.9 33.9 30.8 -9.1% 26.05 +15.4% Perennial Forbs 8.1 9.0 10.6 +15.0% 6.55 +38.2% Annual Grasses 0.3 j0.2 0.2 0 % 1.00 -80.0 % Weedy Forbs 1.5 0.0 -100 % 0.25 -100 % Shrubs 18.8 16.9 +14.2 % 19.70 -14.2% Moss/Lichens 0.0 0.0 0.0 6% 9.55 -100% Vegetative Litter 5.7 13.1 14.6 +10.2% 13.95 +4.4% Bare Ground 27.7 27.5 26.9 -2.1% 22.95 +14.6% Rock 6.0 0.0 0.0 0% 0.00 0% Total 100 100 100 ------ 100 ------- Table 6-13 - Biomass Production (lbs/ac) for Well Pad 4-3H, July 2009 2007 12008 2009 Change 2009 Native Similarity w/ 2009 2008 to 2009 Rangeland Native Rangeland Perennial 233. Grass 8 420.8 382.04 -9.2% 325.18 +14.8% Perennial Forbs 60.7 82.8 99.63 +16.8% 106.01 -6.0% Annual Grass 2.1 1.8 1.64 -8.8% 15.53 -89.4% Weedy Forbs 13.2 9.6 0.00 -100% 6.52 -100% Shrubs 139. 156.3 140.41 -10.1% 153.71 -8.6% Total 549. 671.3 623.72 -7.0% 606.95 +2.6% 2009 Annual Report 21 of 33