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SECTION 2 Study Area Characteristics (South Flat Creek). Eight of the ten identified segments of Sites E61 and E69 are protected in the form of the Water Resources Conservation Overlay Zone adopted by the City of Eugene and Lane County, including setbacks ranging from 0 to 40 feet from top of high bank. Although not hydrologically linked with the southern portion, the northern portion of Flat Creek extends from Beltline Road and continues north where it exits the Metro Plan boundary near Beacon Drive. Eventually the creek joins the Willamette River by way of Ingram Slough near the community of Monroe. Unlike the Al Channel, Flat Creek is a natural drainage feature and is identified for possible protection in the 1987 River Road Santa Clara Urban Facilities Plan (Environmental Design Element), a refinement plan to the Eugene - Springfield Metro Plan. More recently, Flat Creek is listed as a riparian resource site (refer to E59: Flat Creek) in the adopted 2007 Goal 5 Water Resources Conservation Plan, also a refinement plan to the Metro Plan. Six of seven identified segments of Site E59 are protected in the form of the Water Resources Conservation Overlay Zone adopted by the City of Eugene and Lane County, including setbacks ranging from 0 to 20 feet from top of high bank. The condition and function of Flat Creek within the UGB varies significantly with some segments relatively undisturbed and others significantly altered due to urban development property owner impacts. 2.5.1.3 Spring Creek Spring Creek is about two miles long (within the UGB) and flows south -to -north beginning just north of Greenfield Avenue. It crosses River Road near Spring Creek Drive and continues north where it eventually joins the Willamette River nearly 3 miles north of the UGB. The creek flows through Awbrey Park and is adjacent to Spring Creek Elementary School serving both a stormwater and open space function. The creek is bordered by riparian vegetation, predominately Oregon ash and Bigleaf maple. Spring Creek is identified for possible protection in the 1987 River Road Santa Clara Urban Facilities Plan (Environmental Design Element), a refinement plan to the Eugene - Springfield Metro Plan. More recently, Spring Creek is listed as a riparian resource site (refer to E58: Spring Creek) in the adopted 2007 Goal 5 Water Resources Conservation Plan, also a refinement plan to the Metro Plan. Five of six identified segments of Site E58 are protected in the form of the Water Resources Conservation Overlay Zone adopted by the City of Eugene and Lane County, including setbacks ranging from 0 to 40 feet from top of high bank. 2.5.1.4 Willamette Overflow The Willamette Overflow, also referred to as the "East Santa Clara Waterway" is a two mile long waterway located in the northeast portion of the basin and straddles the UGB. It has a relatively high wildlife value and is one of a few vegetated sloughs identified for potential protection in the River Road Santa Clara Urban Facilities Plan (Environmental Design Element), a refinement plan to the Eugene - Springfield Metro Plan. More recently, it is listed as a riparian resource site (refer to E57: East Santa Clara Waterway) in the adopted 2007 Goal 5 Water Resources Conservation Plan, also a refinement plan to the Metro Plan. Two of four identified segments of Site E57 are protected in the form of the Water Resources Conservation Overlay Zone adopted by the City of Eugene and Lane County, including setbacks ranging from 20 to 40 feet from top of high bank. 0:\25695978 Eugene RR -SC Final Basin P1an\Nlaster P1anTINAL 2- 2010\Master_Plan 3- 11- 10_FINAL_ Word _Version.doc 2-15