Environmental Justice Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project Portland, OR January 29, 2021 Earthquake Ready Burnside Bridge Environmental Justice 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 environmental technical specialist. ______________ Signature Reserved for Final Version Prepared by Eduardo Montejo (Transportation Planner) ______________ Signature Reserved for Final Version Checked by Jeff Heilman (NEPA Lead) ______________ Signature Reserved for Final Version Approved by Heather Catron (Consultant Project Manager) Environmental Justice Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project Contents Executive Summary ...................................................................................................................................... 1 1 Introduction .......................................................................................................................................... 2 1.1 Project Location ......................................................................................................................... 2 1.2 Project Purpose ......................................................................................................................... 2 2 Project Alternatives ............................................................................................................................. 3 2.1 No-Build Alternative ................................................................................................................... 3 2.2 Build Alternatives ....................................................................................................................... 3 2.3 Construction Traffic Management Options ................................................................................ 4 3 Definitions ............................................................................................................................................ 5 3.1 Geographic Terminology ........................................................................................................... 5 3.2 Demographic Terminology ........................................................................................................ 7 4 Laws and Regulations ......................................................................................................................... 8 5 Impact Analysis Methodology and Data Sources................................................................................ 9 5.1 Long-Term Impact Assessment Methods ............................................................................... 10 5.2 Short-Term Impact Assessment Methods ............................................................................... 11 5.3 Indirect Impact Assessment Methods ..................................................................................... 11 5.4 Cumulative Impact Assessment Methods ............................................................................... 11 5.5 Mitigation Approach ................................................................................................................. 12 5.6 Public Outreach Methods ........................................................................................................ 12 6 Affected Environment ........................................................................................................................ 14 6.1 Environmental Justice Area of Potential Impact...................................................................... 14 6.1.1 West Bridgehead ........................................................................................................ 15 6.1.2 East Bridgehead ......................................................................................................... 15 6.1.3 Environmental Justice Populations ............................................................................ 16 6.2 Social and Emergency Service Providers ............................................................................... 28 6.2.1 West Bridgehead ........................................................................................................ 28 6.2.2 East Bridgehead ......................................................................................................... 28 7 Environmental Consequences .......................................................................................................... 28 7.1 Introduction .............................................................................................................................. 28 7.2 Pre-Earthquake Impacts (Long-Term) .................................................................................... 37 7.2.1 No-Build Alternative.................................................................................................... 45 7.2.2 Build Alternatives ........................................................................................................ 46 7.2.3 Enhanced Seismic Retrofit Alternative ....................................................................... 48 7.2.4 Replacement Alternatives with Short-Span or Long-Span Approaches .................... 49 7.2.5 Replacement Alternative with Couch Extension ........................................................ 51 7.3 Post-Earthquake Impacts (Long-Term) ................................................................................... 53 7.3.1 No-Build Alternative.................................................................................................... 53 7.3.2 Enhanced Seismic Retrofit Alternative ....................................................................... 55 7.3.3 Replacement Alternatives with Short-Span or Long-Span Approach ........................ 56 7.3.4 Replacement Alternative with Couch Extension ........................................................ 56 7.4 Construction Impacts (Short-Term) ......................................................................................... 56 January 29, 2021 | i Environmental Justice Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project 7.4.1 Without Temporary Bridge ......................................................................................... 57 7.4.2 With Temporary Bridge .............................................................................................. 58 7.5 Cumulative Effects .................................................................................................................. 59 7.5.1 No-Build Alternative.................................................................................................... 61 7.5.2 Build Alternatives ........................................................................................................ 62 7.6 Compliance with Laws, Regulations, and Standards .............................................................. 62 7.6.1 No-Build Alternative.................................................................................................... 62 7.6.2 Build Alternatives ........................................................................................................ 63 7.7 Conclusion ............................................................................................................................... 63 7.7.1 Long-Term Impacts .................................................................................................... 64 7.7.2 Short-Term Impacts .................................................................................................... 65 8 Mitigation Measures .......................................................................................................................... 66 8.1 Community Engagement and Communications Measures ..................................................... 66 8.2 Economic Measures ................................................................................................................ 67 8.3 Transportation Measures ........................................................................................................ 67 8.4 Acquisition and Displacement Measures ................................................................................ 68 9 Contacts and Coordination ................................................................................................................ 69 10 Preparers ........................................................................................................................................... 69 11 References ........................................................................................................................................ 70 Tables Table 1. Minority Populations within the API and County ........................................................................... 18 Table 2. Minority Populations within Census Tracts ................................................................................... 18 Table 3. Minority Population Change Over Time (2012–2017) .................................................................