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PERMFILE110574
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PERMFILE110574
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Last modified
8/24/2016 10:07:20 PM
Creation date
11/24/2007 7:51:24 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
WATERS OF THE US & WETLANDS DELINEATION CEDAR CREEK ASSOC 1999
Section_Exhibit Name
Exhibit 2.04-E6 Part 3
Media Type
D
Archive
No
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were double-flagged at the origin and terminus of such boundaries to simpl8y surveying activities. The <br />• results of the field analysis are summarized in the following paragraphs. Copies of the data sheets <br />completed in the field are included with this report. <br />Site Overview <br />The project area consists of a narrow, gently to moderately sloping drainage bordered by a dense <br />mountain shrub vegetation community. This drainage is deeply incised with steep, rocky side slopes <br />preventing the development of broad, continuous wetland zones. The channel gropers comparatively <br />narrow with short banks and abed lined with gravel- and cobble-size rock fragments. Nearly level to gently <br />sloping alluvial terraces bordering the channel occur, but are raze. In most instances these terraces are <br />exceptionally narrow leading to the steep drainage side slopes referred to above. No other streams, <br />ponds, lakes, or other open water bodies occur within the boundaries of the project area Similarly, no <br />side channels exhibiting defined beds and banks or wetland communities were observed draining into Elk <br />Creek within the project area. <br />Uplands dominate the project area and occur immediately upslope from the creek channel or the <br />narrow wetland fringe bordering d. Though some fort-dominated communities occur on steeper slopes, <br />the mountain brush vegetation community is essentially ubiquitous. A number of established, mature <br />Populus angustiloliatrees are included in these uplands on upper terraces lying well above the OHWM. <br />This species is associated with other tree and tall shrub species considered to be characteristic of upland <br />conditions. <br />Wetland/upland transition zones are typically nanow to abrupt as a function of projed area <br />topography and channel morphology. Transition zones typically occur on narrow, intermittent, first and <br />second terraces lying above the creek banks. These terraces may support either upland or wetland plant <br />species depending on the soil moisture regime, with height above the ordinary high water mark (OHWM) <br />appearing to be the wntrolling hydrologic factor. <br />• Wetland plant communities are typically confined to the narrow borders of the drainage channel <br />though some extend upslope and are associated with an old channel "oxbow", an abandoned road bed <br />paralleling the creek, or where ovedand flow has been concentrated upslope and eventually drains into <br />Elk Creek. These wetland communities are comparatively simplistic in terms of diversity, typically being <br />dominated by two or three hydric species. Wetlands occurring any distance from the banks of the creek <br />are noticeably less dense and diverse than those bordering the creek bank. In addition to the wetlands <br />flagged in the field, other wetlands occur intermittently along the creek banks and are characterized by <br />small concentrations of wetland species surrounded by, or interspersed with, upland shrub species typical <br />of the surrounding mountain shrub vegetation community. These wetlands, discussed more fully below, <br />have become established in defined alluvial soil deposits which have remained stable despite fluctuations <br />in creek flows. Where d occurs in such wetlands, P. angustilolia trees are fully mature specimens and no <br />recruitment of this species was observed along the channel proper. <br />Upland/Wetland Delineation Specifics <br />Uplands dominate the projed area occurring along both creek banks and the more level mountain <br />toe slopes occasionally located adjacent to the creek. The uplands support a mountain shrub community <br />characterized by a diversity typical of this area Shrub density increases in proximity to the creek as <br />moisture increases. Sample points OX-2 and OX-4 were selected to characterize upland types bordering <br />delineated wetlands. The vegetation community of sample point OX-2 s dominated by a Poa species <br />believed to be pratensis, Geranium caespitosum, Potentilla gracilis, and Frageria virginiana. The soil has a <br />matrix color of 10YR 3/2 with no indications of mottling or glsying to adepth of 12 inches. Similady, no <br />wetland hydrology indicators were observed. Sample point OX-4 supports a vegetation community <br />dominated by Epilobium angustilolium, Ouercus gambelii, and Rosa woodsii. The soil and hydrology <br />characteristics of OX-4 parallel those of OX-2 with the exception of a slightly lighter matrix chroma. <br />• Atypical upland transition community is represented by sample point OX-5. This sample point is <br />located on the second terrace above the OHWM. The vegetation community is dominated by O. gambelii <br />and Amelanchier a/nilolia in the shrub stratum, Smiladna stellata in the herbaceous stratum, and P. <br />
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