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Page 5 <br /> Jun Monroe <br /> Patterson Pass Business Park <br /> Recent sediment deposits in the channel mask the existing vegetative cover. A marrow 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 /> ' D:airtare 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. Tae 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 /> (Hordeum marinum ssp gussoneanum) were the dominant species. Surrounding the pond <br /> •:,,cre upland species such as mustard, ripgut brome (Bromus diandrus), soft chess (Bromus <br /> hordaceus), fescue (Vulvia sp.), fiddleneck (Amsinckia sp.), milk thistle (Silybum marianum), <br /> and miners' lettuce (Claylonla perfoliota), which define the upland boundary of the pond. <br /> Drainage B is classified as waters of the U.S., whereas the pond is classified ac a wetland (see <br /> Sheet 4). <br /> Acreaees of Wetlands and Waters of the U.S. <br /> _ Site Wetland acreage :Waters acreage: <br /> Pattercpn Run - _ 2.04 <br /> 2,8 <br /> DrainJe A 0.19 <br /> _-_ Drainane B _ 0.016 <br /> -- Pond 0.65 — — — <br /> We appreciate your review of this kTonnation and response to this request for a jurisdictional <br /> determination. If you have any questions, please do not hesitate to call meat (510)438-077I. <br /> Since i� <br /> H6pe Kmgma <br /> Biologist <br /> Enclosures <br /> cc: Paul Lang, King and Lyons <br /> Eddie Sieu, Ruggeri-Jensen-Azar&Associates <br /> Jane Valerius <br /> RMI <br /> I % T(A\ n T9C) t. I n(. <br />