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AX0622181133PDX iii <br />Contents <br />Section Page <br />Acronyms and Abbreviations .............................................................................................................. v <br />1 Introduction ....................................................................................................................... 1-1 <br />2 Background Information ..................................................................................................... 2-1 <br />3 Basis of Design Report Summary ......................................................................................... 3-1 <br />4 Site Screening and Selection Process ................................................................................... 4-1 <br />4.1 Site Screening and Selection Process Overview .............................................................. 4-1 <br />4.2 Identify List of Potential Sites Using Initial Siting Criteria ................................................ 4-2 <br />4.3 Conduct Preliminary Site Screening ................................................................................. 4-3 <br />4.4 Conduct Secondary Site Screening .................................................................................. 4-4 <br />4.4.1 Step 1 – Secondary Site Screening ...................................................................... 4-4 <br />4.4.2 Step 2 – Secondary Site Screening, Scoring, and Ranking .................................. 4-7 <br />5 Public Involvement Activities .............................................................................................. 5-1 <br />6 Final Recommendation and Next Steps ................................................................................ 6-1 <br />Appendixes <br />A Basis of Design Report <br />B Site Ranking Matrixes <br />C Background Data for Select Secondary Screening Criteria <br />D Public Involvement Materials <br />Tables <br />4-1 Comparative Rough-Order-of-Magnitude Costs ........................................................................... 4-6 <br />4-2 Summary of Total Weighted Scores ............................................................................................. 4-8 <br />5-1 Summary of Community Feedback Received at Public Meetings ................................................ 5-1 <br />5-2 Number of Community Comments Received During Feedback Periods ...................................... 5-2 <br />Figures <br />2-1 Existing Site Flooding .................................................................................................................... 2-1 <br />4-1 Sequential Siting Process .............................................................................................................. 4-1 <br />4-2 Initial 60 Potential Sites ................................................................................................................ 4-2 <br />4-3 32 Sites Identified in Preliminary Screening ................................................................................. 4-3 <br />4-4 11 Sites Identified in Step 1 of Secondary Site Screening ............................................................. 4-4 <br />4-5 Conceptual Site Layouts of Three Potential Sites ......................................................................... 4-5 <br />4-6 US 97/Old Highway 10 Site ........................................................................................................... 4-6