Agenda Packet 7-22-19 Work Session

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Ordinance Exhibit DOrdinanceExhibitD DOWNTOWN RIVERFRONT LAND USE COMPONENTS CA 19-1,RA 19-1,Z 19-5,WG 19-3,ST 19-3,and SDR 19-2 April 19,2019 According to ODFW,two salmonid populations listed under the ESA are documented as occurring within the reach of the Willamette River that flows through the project area: Upper Willamette River spring Chinook (Oncorhynchus tshawytscha )and Critical Habitat - federally threatened (FT) Columbia River bull trout (Salvelinus confluntus)Distinct Population Segment (DPS)and Critical Habitat -FT There are no other documented occurrences of significant wildlife species within the subject site. ODFW has not made any subsequent determinations of significant sites on the subject property.Based on these findings,this criterion is satisfied. (c)Protection and enhancement of the natural vegetative fringe along the Willamette River to the maximum extent practicable. As noted previously,the subject property includes 1,500 linear of frontage along the Willamette River. The subject property is located on an outer,scouring bank.The entire river frontage is reinforced with revetments to provide bank stability and protect civil infrastructure.The average slope of the riverbank,between the Riverbank Trail and water's edge,ranges between 34 and 44 percent. The vast majority of the subject site is prior developed and has been used for industrial and utility uses since 1908.Since that time,large volumes of fill material have been imported and placed on the subject site.These factors have reduced riverbank complexity,which,has contributed to a loss of riparian habitat on the subject site (Exhibit G:Riverfront Ecological Analysis and Design Report). Other on-site vegetation consists of trees,shrubs,and groundcovers within parking lot landscape islands and landscape strips adjacent to sidewalks,parking areas,and buildings;and,a narrow strip of shrubs and grasses between the westernmost edge of the Riverbank Trail and developed areas.As illustrated on Sheets S1.0 and Sl.l Existing Conditions Plan (Exhibit B.l),the natural vegetative fringe along the Willamette River is limited to the area between the water's edge the easternmost edge of the Riverbank Trail,with the exception of a small strip of landscaping along the west edge of the Riverbank Trail. Existing riparian vegetation protection measures established by the /WR Overlay Zone in EC 9.4900 9.4980 will not be affected by the proposal.The proposal designates approximately 7.07 acres of land adjacent the Willamette River for cultural landscape and open space uses.S-DR/CL sub-district development standards are designed to facilitate the restoration and enhancement of the natural vegetative fringe along the Willamette River,as illustrated on Sheets L1.0 and Ll.l Site Plans. As noted previously,the Riverfront Park includes three types and locations of riparian enhancement in order to protect and enhance the natural vegetative fringe along the Willamette River to the maximum extent practicable: 1)Riparian Enhancement -Grading and Planting The park site is narrow at the north and south ends to accommodate existing buildings on the river,namely the EWEB Headquarters buildings to the north and the decommissioned EWEB Steam Plant to the south.The site widens between these areas,allowing for a grading back of the bank to create a gentler slope;installation of a fabric encapsulated stabilization system; seeding;and replanting with native riparian species.This work will result in a rich and diverse river's edge habitat and will maintain the roughness needed to allow for slower water through this area. City of Eugene 56FINALSUBMITTALJuly 22, 2019, Work Session – Item 3