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Sub-basin/Drainage Area: Amazon Creek/Ridgeline <br />Major Open watervays: Amazon Cr. (17.9 miles), Amazon Diversion Channel (2.3 miles), Dead Cow Cr., Tugman Cr. <br />Land use: primarily low -medium density residential land. Several large tracts of agricultural and parks/open space land on the downstream end of this <br />sub-basin. Commercial land is concentrated along Amazon Creek. <br />Kincaid's lupine NA Not present in upper Amazon although potential Dispersal limited in upper Amazon because of isolation <br /> habitat exists. West Eugene has scattered and human use. Best opportunities for dispersal are on <br /> o ulations. restored wetlands in west Eu ene. <br />Howell's montia NA Suitable habitat is limited in upper Amazon; one Seed dispersal via automobile tires may provide for <br /> population known in church parking lot. West dispersal between upper and lower portions of sub- <br /> Eugene has scattered suitable habitat. Not known in basin. <br /> any native habitats in west Eugene. Could be found <br /> on native habitat that is vernally wet with sparse <br /> ve etation. <br />tall bugbane NA Secure in small populations along Ridgeline trail. Disperal habitat is also threatened by hillside <br /> Populations are threatened by closing canopies and development and increasinfgy closed canopies. <br /> hillside develo ment. <br />timwort NA Not present in upper Amazon (little potential habitat Sometimes this species will disappear at one site and <br /> exists). West Eugene has scattered populations; reappear at another nearby site. Dispersal <br /> located at shorelines of shallow water habitats (e.g. opportunities fairly good. <br /> restoration sites . <br />Birds <br />Bald eagle Y May hunt over fields and prairie areas in sub-basin. Adjacent habitat near enough for easy dispersal. <br /> Nesting sites nearby along Fem Ridge Reservoir. <br />common nighthawk N Foraging habitat could be almost anywhere in sub- Adjacent habitat near enough for easy dispersal. <br /> basin <br />olive sided flycatcher N Habitat exists in headwater portions of Amazon Adjacent habitat near enough for easy dispersal. <br /> Creek and Rid eline area. <br />pileated woodpecker Y Habitat exists in headwater portions of Amazon Adjacent habitat near enough for easy dispersal. <br /> Creek and Rid eline area. <br />little willow flycatcher N Habitat along riparian areas and wetlands with Adjacent habitat near enough for easy dispersal. <br /> willows and other shrubs. <br />American ere rine falcon Y/N Sub-basin lacks suitable Westin habitat. Adjacent habitat near enou h for eas dis ersal. <br />yellow-breasted chat N Habitat along riparian areas and wetlands with Adjacent habitat near enough for easy dispersal. <br /> thickets es eciall blackber and shrubs. <br />Oregon vesper sparrow N Potential habitat in agricultural areas and parks and Adjacent habitat near enough for easy dispersal. <br /> o ens aces. <br />purple martin N Nesting at Fem Ridge Reservoir. May forage on the' Opportunties to disperse are limited by lack of suitable <br /> westem frin a of Amazon sub-basin. ad'acent Westin habitat. <br />westem bluebird Y Potential habitat in agricultural areas, parks and Adjacent habitat near enough for easy dispersal. <br /> other o ens aces. <br />westem meadowlark N Potential habitat in agricultural areas, parks and Adjacent habitat near enough for easy dispersal. <br /> other o ens aces. <br />~Y= yes, N= no, D= downstream, NA= not applicable, YIN= some individuals migrate/others overwinter <br />ZPermanent resident refers to speciesthat do not migrate out of the area at any Point during their life cycle. <br />Hydrology <br />Roughly 1/3 of open waterways have been channelized; several miles of Amazon Creek are encased in concrete <br />The majority of the area in this sub-basin is covered by impervious surfaces. In combination with stream channelizafion, this has created a flashy system. <br />This is very different than historical conditions when wetlands surrounding Amazon Creek were flooded most of the winter, which presumably attenuated <br />high flows and may have recharged groundwater in some places. <br />Water Quality <br />Water quality issues include low summertime dissolved oxygen, high water temperature, high total phosphorus, high levels of E. coli, heavy metals and <br />other chemical toxins. Amazon Creek is listed on the state's 303(d) fist for bacteria (year round) & dissolved oxygen (summer); sediment contaminants <br />listed as potential concern include PAHs, phthalates, cadmium, copper, lead, zinc, DDT, chlordane, dioxins, & furans. <br />Designated Beneficial Uses of Amazon Creek and Waterbodies Immediately Downstream <br />.Industrial water supply, irrigation, livestock watering, salmonid fish rearing (trout & whitefish), resident fish & aquatic life, fishing, boating, water contact <br />recreation, wildlife & hunting, aesthetic quality <br />Water Quantity <br />No instream water rights <br />Water flow data for 9/1979-5/1982 data collected at Amazon Creek near Eugene indicates the following average flows: winter- moderate flows of 20-70 <br />CFS with several very high daily flows of (examples) 411,432, 918 CFS; spring - variation between years with average flow of 20-40 CFS and years with <br />average flow of 7-15 CFS; summer -very low flow of 1.5-4 CFS; fall -very low flows of 1-3 CFS. <br />Soils <br />A large percentage of the soils in this sub-basin are considered highly erodible (according to soil conservation service models). However, this designation <br />is only meaningful in those places not covered by an impervious surface. Hydric soils are prevalent along Amazon Creek. <br />Riparian Conditions <br />