I Opinion by Ryan. <br />2 NATURE OF THE DECISION <br />3 Southeast Neighbors Neighborhood Association (Southeast Neighbors) appeals a <br />4 decision approving a tentative planned unit development application. <br />5 REPLY BRIEFS <br />6 Southeast Neighbors and intervenors West Creek, LLC, South Park Associates, LLC <br />7 and HomebuiIders Association of Lane County (collectively, West Creek) each filed a <br />8 response brief and each moves for permission to file a reply brief to respond to new matters <br />9 raised in the others response brief The reply briefs are allowed. <br />10 FACTS <br />11 West Creek applied for tentative planned unit development (PUD) approval to create <br />12 75 residential lots on an approximately 26-acre property located in the South Hills area of the <br />13 city. The subject property is zoned Low Density Residential (R-1), and is within the PUD <br />14 overlay zone and the Water Resources (WR) overlay zone. The property is located south of <br />15 the intersection of West Amazon Drive and Martin Street. Access to the property is proposed <br />16 to be provided over an existing unimproved right of way that extends the developed portion <br />17 of West Amazon Drive through the property from north to south, from Martin Drive to Fox <br />18 Hollow Road. The entire property is included on the city's inventory of significant resources <br />19 under Statewide Planning Goal 5 (Natural Resources, Scenic and Historic Areas, and Open <br />20 Spaces) and the property is also included on the city's inventory of buildable lands under <br />21 Statewide Planning Goal 10 (Housing). Three segments of Amazon Creels are located on the <br />22 property. <br />23 The property is sloped. One provision of the Eugene Code (EC) that we set out and <br />24 discuss later prohibits grading on portions of a development site that meet or exceed 20 <br />25 percent slope. EC 9.8325(5). The slope of the property was and is a central question in this <br />26 appeal. Based on a slope map of the property provided by West Creek that measured slope <br />Page 2 <br />