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Larry Routten June 29, 1992 Page 3 any Agriculture Stabilization and Conservation Service (ASCS) records for fields in the baseline study area. Additional investigations will include searches for State and Federal T & E species, documentation of any special interest vegetation communities, and any necessary wetland evaluations. As discussed on June 18, production data will not be collected in the additional study area community types which are determined to be similar to communities sampled in 1990. These include the sagebrush, mountain brush, aspen, steep mountain brush, alkali sagebrush/western wheatgrass, and mesic drainage types. Production will be sampled in communities not previously studied, if possible. Some of these areas may have already been grazed. Any required areas not sampled for production in 1992 will have grazing exclusion in place prior to any grazing in 1993, and production sampling in 1993 will be as described earlier. However, cover and density data will be collected this season in all community types where required. Sampling will be to adequacy or to the intensities specified later in this letter. To show that the above communities in the additional study areas are similar to the 1990 baseline area communities, an adequate number of random cover samples will also be taken in the 1990 baseline area. The additional area samples will be compared to the samples taken in the 1990 baseline area using a T test to show similarity. All data used will be from the 1992 field season. The sample adequacy equation will use d = .10 and T = 1.64. The following describes proposed sampling intensities by parameter for the various communities in the additional study areas. Mountain Brush Cover - 15 minimum, 50 maximum or to adequacy Density - 15 minimum, 50 maximum or to adequacy Production - not necessary if type is similar to 1990 baseline types