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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 charwel 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 /> Drainage 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 draws 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 /> (Hordeum marinun: ssP gussoneanlrm) were the dominant species. Surrounding the pond <br /> mus <br /> acre upland species such as mustard, ripgut brome (Bromus diandrus), soft chess (Bro <br /> hordaceus), fescue (Yuloia sp.), iiddleneck.(tlmsinckia sp.);milk thistle (Silybum marianum), <br /> and mi?iers' lettuce (Claytonia perjoliata), 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 /> Screages of Wetlands and Waters of the U.S. <br /> _ Site _WetIsnd acreage Maters acreage: <br /> _Pattersgn Run _ 2.04 <br /> _Area C _ 2•$ <br /> _- DrainageA 0.19 J <br /> Drainage B O.Q16 <br /> Pond O.GS <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)438-07711. <br /> Sine <br /> H6pe Kingma - <br /> Biologist <br /> Enclosures <br /> cc: . Paul Lang,King and Lyons - <br /> Eddie Sieu,Ruggeri-Jensen Azar&. Associates <br /> Jane Valerius <br /> RHnI'FC[ AIA SFGFIlNCT - <br />