Line 5 Wisconsin Segment Relocation Project Wisconsin Department of Natural Resources Environmental Impact Report Revised March August 2020 LINE 5 WISCONSIN SEGMENT RELOCATION PROJECT ENVIRONMENTAL IMPACT REPORT REVISED AUGUST 2020 Table of Contents Executive Summary ...................................................................................................................................... 1 Project’s Purpose and Need .............................................................................................................. 4 1.1 LINE 5 System .............................................................................................................................. 4 1.1.1 Permanent Decommissioning of Replaced Segments of Line 5 from Service ...................... 6 Proposed Project Description ............................................................................................................ 7 2.1 Line 5 ............................................................................................................................................ 7 2.1.1 Route ..................................................................................................................................... 7 2.1.2 Landowners ........................................................................................................................... 8 2.1.3 Project Schedule .................................................................................................................... 9 2.1.4 Connected Actions ................................................................................................................ 9 2.2 Authorities and Approvals .......................................................................................................... 11 2.2.1 Federal Agencies ................................................................................................................. 11 2.2.2 Wisconsin Department of Natural Resources ..................................................................... 11 2.2.3 Public Service Commission of Wisconsin .......................................................................... 12 2.2.4 Wisconsin Department of Agriculture, Trade, and Consumer Protection .......................... 12 2.2.5 Wisconsin Department of Transportation ........................................................................... 12 2.2.6 Wisconsin Historical Society .............................................................................................. 12 2.2.7 County and Local Government Interests............................................................................. 13 2.2.8 Status of Wisconsin Required Permits and Approvals ....................................................... 13 Alternatives ..................................................................................................................................... 14 3.1 Comparison of Alternatives ........................................................................................................ 14 3.1.1 No-Action Alternative ......................................................................................................... 14 3.1.2 System Alternatives ............................................................................................................ 15 3.1.3 Alternative Transport Modes .............................................................................................. 15 3.1.4 Route Alternatives............................................................................................................... 17 Engineering and Construction Practices ......................................................................................... 22 4.1 Physical Pipeline Characteristics ................................................................................................ 22 4.2 Land Requirements ..................................................................................................................... 23 4.2.1 Construction Right-of-Way ................................................................................................. 23 4.2.2 Additional Temporary Workspace Areas ............................................................................ 25 4.2.3 Access Roads ...................................................................................................................... 25 4.2.4 Pipe Storage and Contractor Yards ..................................................................................... 28 4.2.5 Aboveground Facilities ....................................................................................................... 29 4.2.6 Cathodic Protection and AC Mitigation .............................................................................. 29 4.3 Construction Procedures ............................................................................................................. 29 i LINE 5 WISCONSIN SEGMENT RELOCATION PROJECT ENVIRONMENTAL IMPACT REPORT REVISED AUGUST 2020 4.3.1 Preparation of the Right-of-Way ......................................................................................... 30 4.3.2 Clearing and Grading .......................................................................................................... 30 4.3.3 Hauling and Stringing Pipe ................................................................................................. 33 4.3.4 Trenching ............................................................................................................................ 33 4.3.5 Trench Dewatering .............................................................................................................. 34 4.3.6 Bending ............................................................................................................................... 34 4.3.7 Lineup, Welding, and Weld Inspection............................................................................... 34 4.3.8 Field Coating ....................................................................................................................... 35 4.3.9 Lowering In ......................................................................................................................... 35 4.3.10 Backfilling ........................................................................................................................... 35 4.3.11 Hydrostatic Testing ............................................................................................................. 36 4.3.12 Road and Railroad Crossings .............................................................................................. 37 4.3.13 Final Tie-in and Commissioning ......................................................................................... 37 4.3.14 Cleanup and Restoration ..................................................................................................... 37 4.3.15 Revegetation ....................................................................................................................... 37 4.4 Erosion and Sediment Control Practices ..................................................................................... 38 4.4.1 Fugitive Dust ....................................................................................................................... 39 4.4.2 Spill Prevention and Management ...................................................................................... 39 4.5 Specialized Construction—Waterbodies .................................................................................... 39 4.5.1 Geotechnical Soil Borings and HDD Feasibility Assessments ........................................... 47 4.5.2 Restoration at Waterbody Crossings ................................................................................... 47 4.6 Specialized Construction—Wetlands ......................................................................................... 48 4.6.1 Restoration in Wetlands ...................................................................................................... 51 4.6.2 Wetland Mitigation ............................................................................................................. 51 4.6.3 Post-Construction Wetland Monitoring .............................................................................. 51 4.7 Invasive Species Management .................................................................................................... 51 4.8 Operation, Integrity, and Emergency Response .......................................................................... 52 4.8.1 Integrity Management Program .......................................................................................... 52 4.8.2 Valve Placement ................................................................................................................. 54 4.8.3 Leak Detection .................................................................................................................... 55 4.8.4 Emergency Response .......................................................................................................... 56 Existing Environment ..................................................................................................................... 57 5.1 Air Quality and Noise ................................................................................................................. 57 5.1.1 Air Quality .........................................................................................................................