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plge 5 Jim Monroe Patterson Pass Business Park d of Recent sediment deposits in the channel mask the existing nvegetative tegd by rabb t foot grass, however wetland vegetation was observed along the bank, most of r vegetation growing in the channel were upland species such as wild oats and mustard (Brassica nigra). The channel narrows and ends abruptly as the terrain becomes flat ani opens into a field. This drainage is class fled as waters of the U.S. (see Sheet 3). Drainage B and Pond This drainage flows from a culvert under the California Aqueduct down a narrow canyon. The drainage swale is only two feet across, however the presence of algal growth along the- bottom of the channel clearly defines This surrounded by upland e boundaries.es to end ihe n a flattened area dominated species such as mustard and rye g PPS by upland species. The narrow canyon drains to a pond. •Two data points were taken to define the extent of helic pond. ai the pond's edge curly dock and Mediterranean barley (11ordeum marinun: s.+p gussoneamrm) were the dominant species. Soft cheg,the pond acre upland species such as mustard, ripgut breme (Bromus diandrus), h --rc upland fescue s suloia sp.), fiddleneck (Amsinckia sp.),milk thistle (Silybum marianum), and meiers' lettuce (Claytonia perfoliata), which define the upland boundary of the p?nd. Drainage B is classified as waters of the IJ.S., whereas the pond is classified as a wetland (see Sheet 4). Acreages of Wetlands and Waters of the U.S. Site _Wetland acreage °Wat_ e�e. Patterspn Run 2.04 _Area C-- — - 2.8 _ 0.19 Drainage A ------ 0.016 _ Crainage B --.– Pond 0.65 We appreciate your retiaew of this i tformat 1 ase do not hesitate o call me at (510)jurisdictionalnd response to this request for a 80771.. deterrnination. If you have any questions,p Sinct,�c H pe Ktngma Biologist Enclosures cc: Paul Lang,King and Lyons Eddie Sieu,Ruggeri-Jensen-Azar 8c Associates -Jane Valerius RMI MI t�T [f�ATIO�At.