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intrastate rivers and streams, as well as their intermittent tributaries. The limit of <br /> federal jurisdiction of Non-Tidal Waters of the U.S. extends to the "ordinary high <br /> water mark". The ordinary high water mark is established by physical <br /> characteristics such as a natural water line impressed on the bank, presence of <br /> shelves, destruction of terrestrial vegetation, or the presence of litter and debris. <br /> Jurisdictional wetlands are vegetated areas that meet specific vegetation, soil, <br /> and hydrologic criteria defined by the ACOE Wetlands Delineation Manual and <br /> Regional Supplement (ACOE, 1987; 2008). Jurisdictional wetlands are usually <br /> adjacent to or hydrologically associated with Waters of the U.S. Isolated <br /> wetlands are outside federal jurisdiction, but may be regulated by RWQCB under <br /> the State Wetlands Program. <br /> No potentially jurisdictional wetlands or Waters of the U.S. were observed in the <br /> site. The site consists of upland grassland vegetation that is periodically disked <br /> and soils appear well draining. There are no aquatic features mapped in the site <br /> in the National Wetland Inventory (NWI) (Attachment D). <br /> While it may be best described as a "ditch", Bieghle Drain is a potentially <br /> jurisdictional Waters of the U.S. Bieghle Drain is adjacent to the north edge of <br /> the site, is straight, trapezoidal in shape, and contains sparse amounts of <br /> hydrophytic vegetation. The potential jurisdictional limit of the drain is defined by <br /> an ordinary high water mark (OHWM). The drain carries water from east to west. <br /> Bieghle Drain is depicted as a "blue-line" stream on the USGS topographic map <br /> (Figure 2) and as a Riverine feature in the National Wetland Inventory (NWI) <br /> (Attachment D). Drainage patterns apparent on historical topographic maps and <br /> aerial photographs suggest the drain is a realigned ephemeral creek that flowed <br /> in to Duck Creek further west of the site. While some sections of Bieghle Drain <br /> to the west of the site have been piped, the drain is still tributary to Duck Creek. <br /> 2706 Pock Lane: Biology 10 November 23, 2021 <br />