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identified on the basis of the vegetation, soils and hydrologic characteristics present at the site in <br />accordance with Interim Arid West Regional supplement to the COE Wetland Delineation <br />Manual, December 2006, and the U.S. Army Corps of Engineers Jurisdictional Determination <br />Form Instructional Guide Book, May 30, 2007. The wetland boundary delineation included <br />identification of plant species, vegetation composition and structure. Soil borings (18 ~ inches <br />deep) were taken with an auger for observation of wetland hydrologic and soil characteristics. <br />Soil horizons were examined for color, texture, and moisture characteristics. The wetland <br />boundaries based on these evaluation methods were marked with numbered orange flags and <br />surveyed by Meritt L S. Army Corps of Engineers wetland delineation data forms are in <br />appendix A of this report. Jurisdictional findings are presented in this report and on the <br />Jurisdictional Determination Forms (JDF) 2a and 2b. <br />Significant nexus determinations were made by examining the functions that may significantly <br />affect the physical, chemical, and biological integrity of downstream Traditionally Navigable <br />Waters (TNWs) or contributing Relatively Permanent Waters (RPWs) and Non-RPWs. <br />Additionally, these wetlands were evaluated for their potential to retain or transport sediment <br />and/or pollutants into a TNW or RPW. Where wetland characteristics were present, wetlands <br />were walked to determine surface water connectivity to WOUS and TNWs. Individual wetlands <br />were evaluated based on their physical, chemical, and biological functions and values. Upland to <br />wetland transects were installed and relevant vegetation, soils and hydrologic characteristics <br />were recorded on COE Data Forms. <br />Delineation Findings <br />This delineation included an irrigation canal, irrigation ditches, wetlands, and 2 potential <br />crossings of one perennial stream. WestWater's delineation identified 19 polygons with wetland <br />characteristics. Wetland type, polygon ID's, areas, and flag numbers are summarized in Table 1, <br />jurisdictional findings are summarized in Table 2, and individual flag and transect locations are <br />listed in Table 3. <br />Table 1. Wetland Area Summary <br />Wetland Type Area <br />ID Area in <br />acres Flag Numbers Upland/Wetland Transects <br />and comments <br />Emergent Wetland A 0.4 A001-A021 TAU (upland) -TAW <br />Marsh H 10.85 H001-H112 (wetland), Located at <br />(Total area = 11.51 acres) K 0.166 K001-K018 boundary flags A004. <br /> M 0.077 M001-M006 <br /> O 0.008 0001-0003 THU - THW, between flags <br /> H019 & H020 <br /> D 0.0001 D001 Raised water table from <br /> E 0.013 E001-E004 impounded irrigation water <br />Wetland Fringe B 0.26 B001-B018 TBU - TBW, located between <br />(Total area = 3.12 acres) C 0.6 0001-C052 flags B002 & B003 <br /> F 0.023 F001-F004 Ditch water has been <br /> G 0.01 G001-G005 impounded to raise water <br /> P 0.1 P001-P014 levels (B,C,P,Q,R) <br />WestWater Engineering Page 3 of 75 January 2008 <br />DBMS 424 <br />