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along exposed bedding planes or fractured rock to form seeps and boggy areas; 3) shallow <br />• water conditions exist along the borders of ponds and depressions in channels; and 4) stable <br />conditions occur on portions and banks of the two streams draining the study and surrounding <br />area (Calamity Draw and Tuttle Draw). Because of the variation in site specific water regimes <br />within the type, three major components may be delineated. Dense thickets of coyote willow <br />(Salix exioua) occur on shallow, slightly elevated sites along the drainages where <br />better-drained conditions exist (see midground of Figure 4-3, Peabody Appendix 10-4) or in <br />areas surrounding seeps with similar conditions. Less well-drained areas, or areas where <br />standing or slow-flowing water occurs during much of the growing season, support vegetation <br />that is dominated by phreatophytic and hydrophytic graminoids (carices, rushes, and sedges). <br />The least well-drained areas, or areas where standing water persists, are dominated <br />exclusively by thick stands of cattail (Typha latifolia also a perennial graminoid). <br />The graminoid-dominated component characterizes the Swale/drainage type because of its <br />greater areal extent (approximately 80 percent of the type) than the other two components and <br />its potential grazing utility. The remaining two components generally occur in the eastern half <br />of the study area and almost exclusively in the proposed permit area. Small isolated <br />occurrences of cattails and willows may occur in the western half of the study area. Where <br />• significant areas of cattails and willows occur, they form islands or stringers within the <br />graminoid component. Where all three components occur together, they form a relatively <br />complex mosaic (see Figure 4-5, Peabody Appendix 10-4). <br />Vegetation cover, frequency and herbaceous production samples were concentrated in the <br />graminoid component of the Swale/drainage type primarily because of measurability and the <br />fact that this component comprises the majority of the type. The willow component has a <br />closed canopy and measurement of the production of shrubs is not required by OMLR <br />regulations. However, density data in the willow thickets was collected. No data was collected <br />from the cattail component. Both the willow and cattail components function primarily as <br />wildlife habitat (see Section 2.04.11, Fish and Wildlife Resources Information). The cover and <br />frequency sampling results for the graminoid component are summarized in Table 2.04.10-9. <br />The individual plot data, from which the summary is derived, may be found in Peabody <br />Appendix 10-2 (Table 2-11 ). <br />• (REVISED 9/99) 2.04.10 - 40 <br />