Land Use Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project Portland, OR January 29, 2021 Earthquake Ready Burnside Bridge Land Use Technical Report Prepared for Multnomah County Transportation Division – Bridges 1403 SE Water Ave Portland, OR 97214 Prepared by HDR 1050 SW 6th Ave, Suite 1800 Portland, OR 97204 T (503) 423-3700 Parametrix 700 NE Multnomah St, Suite 1000 Portland, OR 97232 T (503) 233-2400 Contract# DCS-SVCSGEN-857-2019-conv HDR Project #10144814 CERTIFICATION The technical material and data contained in this document were prepared under the supervision and direction of the undersigned, as a professional planner. ______________ Signature Reserved for Final Version Prepared by Sabrina Robinson (Planner) ______________ Signature Reserved for Final Version Checked by Jennifer Hughes (Senior Environmental Planner) ______________ Signature Reserved for Final Version Approved by Heather Catron (Consultant Project Manager) Land Use Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project Contents Executive Summary ...................................................................................................................................... 1 1 Introduction .......................................................................................................................................... 1 1.1 Project Location ......................................................................................................................... 1 1.2 Project Purpose ......................................................................................................................... 3 2 Project Alternatives ............................................................................................................................. 3 3 Definitions ............................................................................................................................................ 3 4 Legal Regulations and Standards ....................................................................................................... 4 4.1 Laws, Plans, Policies, and Regulations .................................................................................... 4 4.1.1 State of Oregon ............................................................................................................ 4 4.1.2 Regional ....................................................................................................................... 5 4.1.3 City of Portland ............................................................................................................. 5 4.2 Design Standards ...................................................................................................................... 6 5 Affected Environment .......................................................................................................................... 7 5.1 Area of Potential Impact ............................................................................................................ 7 5.2 Resource Identification and Evaluation Methods ...................................................................... 7 5.2.1 Published Sources and Databases .............................................................................. 7 5.2.2 Field Visits and Surveys ............................................................................................... 8 5.3 Existing Conditions .................................................................................................................... 8 5.3.1 Zoning .......................................................................................................................... 8 5.3.2 Existing Land Use ...................................................................................................... 11 5.3.3 Long-Range Plans ...................................................................................................... 17 6 Impact Assessment Methodology and Data Sources ....................................................................... 21 6.1.1 Long-Term Impact Assessment Methods .................................................................. 21 6.1.2 Short-Term Impact Assessment Methods .................................................................. 22 6.1.3 Indirect Impact Assessment Methods ........................................................................ 22 6.2 Cumulative Impact Assessment Methods ............................................................................... 22 7 Environmental Consequences .......................................................................................................... 22 7.1 Introduction .............................................................................................................................. 22 7.2 Pre-Earthquake Impacts.......................................................................................................... 23 7.2.1 No-Build Alternative.................................................................................................... 27 7.2.2 Enhanced Seismic Retrofit Alternative ....................................................................... 27 7.2.3 Replacement Alternative with Short-Span Approach ................................................. 31 7.2.4 Replacement Alternative with Long-Span Approach ................................................. 33 7.2.5 Replacement Alternative with Couch Extension ........................................................ 35 7.3 Post-Earthquake Impacts ........................................................................................................ 41 7.3.1 No-Build Alternative.................................................................................................... 41 7.3.2 Enhanced Seismic Retrofit Alternative ....................................................................... 41 7.3.3 Replacement Alternative with Short-Span Approach ................................................. 42 7.3.4 Replacement Alternative with Long-Span Approach ................................................. 42 7.3.5 Replacement Alternative with Couch Extension ........................................................ 43 7.4 Construction Impacts ............................................................................................................... 43 7.4.1 Without Temporary Bridge ......................................................................................... 46 7.4.2 With Temporary Bridge .............................................................................................. 53 7.4.3 Potential Off-Site Staging Areas ................................................................................ 54 January 29, 2021 | i Land Use Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project 7.5 Cumulative Effects .................................................................................................................. 57 7.5.1 No-Build Alternative.................................................................................................... 57 7.5.2 Build Alternatives ........................................................................................................ 57 7.6 Compliance with Laws, Regulations, and Standards .............................................................. 58 7.6.1 Consistency with State and Local Planning Goals ..................................................... 58 7.7 Conclusion ............................................................................................................................... 60 8 Mitigation Measures .......................................................................................................................... 60 9 Contacts and Coordination ................................................................................................................ 63 10 Preparers ........................................................................................................................................... 63 11 References ........................................................................................................................................ 64 Tables Table 1. Existing Land Use in the API ........................................................................................................ 12 Table 2. List of Potential Redevelopment Lots ........................................................................................... 15 Table 3. Impacted Properties – Long-Term Impacts .................................................................................. 23 Table 4. Land Use Types Permanently Converted to Transportation Use by Alternative .......................... 26 Table 5. Impacted Properties – Temporary Construction Impacts ............................................................. 43 Table 6. Land Use Type with Temporary Construction Use by Alternative ................................................ 46 Table 7. Potential Mitigation Measures ....................................................................................................... 61 Figures Figure 1. Direct Impact API ........................................................................................................................... 2 Figure 2. Existing Zoning .............................................................................................................................. 9 Figure 3. Existing Land Use .......................................................................................................................