Parks and Recreation Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project Portland, OR January 29, 2021 Earthquake Ready Burnside Bridge Parks and Recreation 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 planner. ______________ Signature Reserved for Final Version Prepared by Jennifer Hughes (Senior Environmental Planner) ______________ Signature Reserved for Final Version Checked by Jeff Heilman (NEPA Lead) ______________ Signature Reserved for Final Version Approved by Heather Catron (Consultant Project Manager) Parks and Recreation 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 ......................................................................................................................... 4 2 Project Alternatives ............................................................................................................................. 4 3 Definitions ............................................................................................................................................ 5 4 Legal Regulations and Standards ....................................................................................................... 5 4.1 Laws, Plans, Policies, and Regulations .................................................................................... 5 4.1.1 Federal ......................................................................................................................... 5 4.1.2 State and Local ............................................................................................................ 6 4.2 Design Standards ...................................................................................................................... 7 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 Willamette River Recreation ......................................................................................... 8 5.3.2 Willamette River Greenway Trail ................................................................................ 10 5.3.3 Vera Katz Eastbank Esplanade ................................................................................. 10 5.3.4 Governor Tom McCall Waterfront Park ...................................................................... 13 5.3.5 Ankeny Plaza ............................................................................................................. 18 5.3.6 Burnside Skatepark .................................................................................................... 18 6 Impact Assessment Methodology and Data Sources ....................................................................... 19 6.1 Long-Term Impact Assessment Methods ............................................................................... 19 6.2 Short-Term Impact Assessment Methods ............................................................................... 19 6.3 Indirect Impact Assessment Methods ..................................................................................... 20 6.4 Cumulative Impact Assessment Methods ............................................................................... 20 7 Environmental Consequences .......................................................................................................... 20 7.1 Introduction .............................................................................................................................. 20 7.2 Pre-Earthquake Impacts.......................................................................................................... 20 7.2.1 No-Build Alternative.................................................................................................... 20 7.2.2 Enhanced Seismic Retrofit Alternative ....................................................................... 21 7.2.3 Replacement Alternative with Short-span Approach ................................................. 24 7.2.4 Replacement Alternative with Long-span Approach .................................................. 25 7.2.5 Replacement Alternative with Couch Extension ........................................................ 27 7.3 Post-Earthquake Impacts ........................................................................................................ 28 7.3.1 No-Build Alternative.................................................................................................... 28 7.3.2 Enhanced Seismic Retrofit Alternative ....................................................................... 28 7.3.3 Replacement Alternative with Short-Span Approach ................................................. 29 7.3.4 Replacement Alternative with Long-Span Approach ................................................. 29 7.3.5 Replacement Alternative with Couch Extension ........................................................ 29 7.4 Construction Impacts ............................................................................................................... 29 January 29, 2021 | i Parks and Recreation Technical Report Multnomah County | Earthquake Ready Burnside Bridge Project 7.4.1 Without Temporary Bridge ......................................................................................... 35 7.4.2 With Temporary Bridge .............................................................................................. 42 7.4.3 Potential Off-Site Staging Areas ................................................................................ 44 7.5 Cumulative Effects .................................................................................................................. 45 7.5.1 No-Build Alternative.................................................................................................... 47 7.5.2 Build Alternatives ........................................................................................................ 47 7.6 Compliance with Laws, Regulations, and Standards .............................................................. 47 7.7 Conclusion ............................................................................................................................... 49 8 Mitigation Measures .......................................................................................................................... 49 8.1.1 Enhanced Seismic Retrofit Alternative ....................................................................... 49 8.1.2 Replacement Alternative with Short-Span Approach ................................................. 49 8.1.3 Replacement Alternative with Long-Span Approach ................................................. 50 8.1.4 Replacement Alternative with Couch Extension ........................................................ 50 8.1.5 Construction Impacts Mitigation ................................................................................. 50 9 Contacts and Coordination ................................................................................................................ 51 10 Preparers ........................................................................................................................................... 52 11 References ........................................................................................................................................ 53 Tables Table 1. Construction Timing with Parks and Recreation Resources ........................................................ 34 Table 2. Construction Activities Affecting Parks and Recreation Resources ............................................. 34 Table 3. Meetings with Parks and Recreation Stakeholders ...................................................................... 52 Figures Figure 1. Project Area ..................................................................................................................................
Details
-
File Typepdf
-
Upload Time-
-
Content LanguagesEnglish
-
Upload UserAnonymous/Not logged-in
-
File Pages64 Page
-
File Size-