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Page 5 <br /> Jim Monroe <br /> Patterson Pass Business Park <br /> Recent sediment deposits in the channel mask the existing vegetative cover. A narrow band of <br /> wetland vegetation was observed along the bank, dominated by rabbitsfoot grass, however <br /> most of the vegetation growing in the channel were upland species such as wild oats and <br /> mustard (Brassica nigra). The channel narrows and ends abruptly as'the terrain becomes flat <br /> and opens into a field. This drainage is classified as waters of the U.S. (see Sheet 3). <br /> Drairiare B and Pond <br /> This drainage flows from a culvert under the California Aqueduct down a narrow canyon. <br /> The drainage swale is only two feet across, however the presence of algal growth along the <br /> bottom of the channel clearly defines the boundaries. The swale is surrounded by upland <br /> species such as mustard and rye grass. The swale appears to end in a flattened area dominated <br /> by upland species. The narrow canyon drains to a pond. •Two data points were taken to <br /> define the extent of the pond. At the pond's edge curly dock and Mediterranean barley <br /> (Flordeum marinum ssp gussoneanum) were the dominant species. Surrounding the pond <br /> -.were upland species such as mustard, ripgut breme (Bromus diandrus), soft chess (Bromus <br /> hordaceus), fescue (Vu1Dia sp.), fiddleneck (Amsinckia sp.), milk thistle (Silybum marianum), <br /> and mi'iers' lettuce (Claytvnia perfoliato), which define the upland boundary of the pond. <br /> Drainage B is classified as waters of the U.S., whereas the pond is classified as a wetland (see <br /> Sheet 4). <br /> Acreaees of Wetlands and Waters of the U.S. <br /> _ <br /> Site Wetland acreage i Waters acreage: <br /> Patter`on R;:n 2.04 _ <br /> -- <br /> Area — --- 2.8 <br /> _Dra192cjeA 0.19 <br /> Drainage B 0.016 _ <br /> Pond 0.65 <br /> We appreciate your review of this information and response to this request for a jurisdictional <br /> determination. If you have any questions, please do not hesitate to call me at (510)438-077I. <br /> Since ><{, <br /> H6pe Km' gena �— <br /> Biologist <br /> Enclosures <br /> cc: Paul Lang, King and Lyons <br /> Eddie Sieu, Ruggeri-Jensen-Azar&Associates <br /> Jane Valerius <br /> RMI <br /> R E,q v x c MA %A G M L S 7 <br /> I %T[f l.% n T 1 4%A l. INC. — <br />