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<br />secondary terrace. These communities are generally restricted to topographic <br />depressions. They are localized and form a mosaic throughout the property. The <br />dominant species are sedges and rushes. The following species were commonly <br />encountered within the sedgelnrsh swales; three square (Scirpus americanus), Baltic rush <br />(Juncos balticus), foxtail bazley (Hordeum jubatum), blue joint (Calamagrostis <br />canadensis), and red and alsrlce clovers (Trifolium repens and Trifolium pratense). The <br />sedge and rush species often form a dense monocuhure in these areas, and species may be <br />segregated by slight differences in the moisture regime caused by drying or <br />microtopography within the Swale or depression. Sedge/rush swales intergrade with the <br />following vegetation community throughout the properties. <br />Wet Meadow vegetation communities are found along the toe of the slope that separates <br />the primary alluvial terrace and the secondary terrace within the Green property. Wet <br />meadow communities aze also found above the large pond on the Green property and <br />adjacent to the south boundary on both properties. The dominant species are sedges and <br />grasses including three square (Scirpus americanus), foxtail barley (Hordeum jubatum), <br />and blue joint (Calamagrostis canadensis). <br />Mized grassland vegetation is found within the remaining azeas of the property. Grasses <br />and forbs dominate this community. The dominant species aze inland saltgrass <br />(Distichlis spiccrta), red and als$ce clovers, and foxtail bazley. <br />Soils <br />Soils within the area of interest are representative of their genesis and topographic <br />position. The Natural Resource Conservation Service (USDA, 1980) identifies five sord~ <br />map units within the properties. <br />The primary alluvial terrace adjacent to the Big Thompson River contains Aquolls and <br />Aquents. Aquolls and Aquents develop along bottomlands and flood plains of major <br />streams. They are deep, poorly drained soils formed in recent alluvium. Commonly the <br />soils have a loamy or clayey surface layer and are underlain by sand and gravel within 48 <br />inches. The differences between these soils are found in the color of their surface layer's. <br />Aquoll and Aquent soils aze defined as hydric by the U.S. Army Corps of Eng'ureers <br />(USAGE, 198Tj. <br />The southeast comer of the Croissant property contains Paoli loam. Paoli loam is a deep, <br />well rained soil formed in alluvial deposits on terraces. Typically, the surface layer is <br />grayish brown loam and fine sandy loam about 25 inches thick. The underlying material <br />to a depth of 60 inches is light brownish gray fine sandy loam This soil type is not <br />identified as hydric by the USAGE. <br />The slope that separates the primary and secondary terraces contains Cascajo gravelly <br />sandy loam This soil unit is also found along the south edge of the Croissant property. <br />This is a deep, excessively drained soil on terrace edges and upland ridges. Typically, the <br />surface layer to a depth of nine inches is a brown gravelly sandy loam The upper part of <br />3 <br />