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bedding planes or fractured rock to form seeps and boggy areas; 3) shallow water conditions <br />• exist along the borders of ponds and depressions in channels; and 4) stable conditions occur on <br />portions and banks of the two streams draining the study and surrounding area (Calamity Draw <br />and Tuttle Draw). Because of the variation in site specific water regimes within the type, three <br />major components may be delineated. Dense thickets of coyote willow (Salix exigua) occur on <br />shallow, slightly elevated sites along the drainages where better-drained conditions exist (see <br />midground of Figure 4-3, Peabody Appendix 10-4) or in areas surrounding seeps with similar <br />conditions. Less well-drained areas, or areas where standing or slow-flowing water occurs <br />during much of the growing season, support vegetation that is dominated by phreatophytic and <br />hydrophytic graminoids (carices, rushes, and sedges). The least well-drained areas, or areas <br />where standing water persists, are dominated exclusively by thick stands of cattail (Typha <br />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 of <br />the study area and almost exclusively in the proposed permit area. Small isolated occurrences <br />• of cattails and willows may occur in the western half of the study area. Where significant areas <br />of cattails and willows occur, they form islands or stringers within the graminoid component. <br />Where all three components occur together, they form a relatively complex mosaic (see Figure <br />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 fact <br />that this component comprises the majority of the type. The willow component has a closed <br />canopy and measurement of the production of shrubs is not required by OMLR regulations. <br />However, density data in the willow thickets was collected. No data was collected from the <br />cattail component. Both the willow and cattail components function primarily as wildlife habitat <br />(see Section 2.04.11, Fish and Wildlife Resources Information). The cover and frequency <br />sampling results for the graminoid component are summarized in Table 2.04.10-9. The <br />individual plot data, from which the summary is derived, may be found in Peabody Appendix 10-2 <br />(Table 2-11 ). <br />LJ <br />(REVISED 8/75/00) 2.04.10 - 35 <br />