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1 1 1 t 1 (i.e., grasses and grass-like plants, fortis and woody plants) that may be expected to occur in the vegetation community being re-established within the success evaluation time. The diversity standard values indicated in the table represent percent contribution to total vegetation cover. It should be noted that the diversity percentage values for each plant habit are not absolute requirements. Indicaoed diversity goals represent an ave-age value within a range that generally constitutes adequate habit diversity, The values indicated are targets and variations from these targets may be expected. Generally, the larger the overall percentage contribution to diversity, the greater the range of acceptable values for a specific plant habit Qualitative judgment will need to be exercised in determining the range of diversity values for reVegeCdtrOn success. For example, a healthy, developing, predomina[ely herbaceous vegetation community with a woody plant diversity goal of 20~ contnbuuon to [oral vegetation cover, but with a very small percentage of young healthy woody species contributing 396 to this habit at the end of the third growing season, would probably be considered successful. The same community with similar requirements and percentages at the end of the 20th growing season would probably represent inadequate woody plant habit development Thoughtful evaluation of plant diversity, growth and development patterns and trends will be necessary when interpreting the adequacy of revegetation diversity. 5,2.2 Final Revegetation Monitoring Measurement methodologies that will be used to monitor revegetation success, the frequency and timing of monitoring, and statistical testing to be used in evaluating adequacy of sample populations are described in this section. 1 1 1 Total Cover wHl be measured using the first-hit, point-intercept monitoring method. First-hit, point-intercept sampling is the best method for measuring Total Cover. It has an advantage over stratified sampling because the Total Cover value always equals 100°,6. Stratified samples may exceed I00°k, which makes measurement, data analyses and vegetation stand characterization more difficult. For these reasons, errors in first-hit, point-intercept sampling are easier to identify and correct than other methods. Percentages of error in first-hit, point- interceptground cover sampling nomrally run at 3°,b or less among observers. Single-hit point-intercept (Bonham 1989) sampling is conducted with aten-point sample frame. The frame may use a rod, optical sights or lasers to establish each sample hit Transacts normally range in length from l0 to 100 meters depending upon the characteristics of the vegetation community being surveyed. Ten sample hits are recorded at ten equidistant locations along the transact (Figure l5). A custom grid will be used to locate transact starting points within the area to be sampled. Using acustom-spaced grid ensures that the point- intercept transacts are distributed evenly across the area to be sampled and that the entire area is adequately represented in the sample population. In addition to plant species or habit, rock, litter and bare ground will be recorded. litter will be considered all non-living plant material that is in contact with the ground surface. Rock will be recorded whenever particle size is larger than 2 mm, which is considered to be the minimum size particle that is non-erodible by sheet flow. Total Cover will be measured as non-overlapping foliar cover. Non-overlapping is defined as plaot cover below a height of 4.5 feet, with only the first plant "hit" being recorded. The first "hit" is recorded for the first type of cover intercepted by the sample point (i.e., plant species, American Soda, LLP. 5-12 Soil Conurvadon. Plosion and Sedlmcru Convol, n•clamation and Revegeulion Ran October 28. 1998