Orchard Street Realignment Study
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Concept Report | January 2020 Orchard Street Realignment Study Ada County Highway District, Idaho This realignment study was a collaborative effort between the Ada County Highway District and the City of Boise with assistance from Burgess & Niple, Inc., Forsgren Associates, Inc., and Bionomic. Valuable input was contributed to this study by area stakeholders and the general public. Project Sponsor: 3775 Adams Street Garden City, Idaho 83714 208.387.610 Project No. 519026 ACHD Team Brooke Green, MBA, PCED, Senior Transportation Planner/Project Manager Christy Foltz-Ahlrichs, Senior Communications Specialist Chelsea Miller, Business/Community Relations Coordinator Caitlin Stevens, Environmental Programs Coordinator Joshua Saak, P.E., P.T.O.E., Traffic Design Engineer Matt Degen, P.E., Civil Engineer Michele White, Senior Right of Way Agent Mitch Skiles, Impact Fee Administrator Carson Shaw, Planning and Projects Student Intern Project City: 150 N. Capitol Blvd. Boise, Idaho 83701 208.384.3830 City of Boise Team Karen Gallagher, Associate Transportation Planner Zach Piepmeyer, P.E., Associate Transportation Planner Consultant Team: Burgess & Niple Bionomics 3597 E. Monarch Sky Lane 1045 E. Winding Creek Drive Suite F-240 Eagle, Idaho 83616 Meridian, Idaho 83646 Forsgren 415 S. 4th Street Boise, Idaho 83702 Consultant Team Steve Thieken, P.E., P.T.O.E., A.I.C.P. Project Manager (B&N) Molly Loucks, P.E. (B&N) Stephen Waldinger, P.E. (Forsgren) Sam Larrondo, P.E. (Forsgren) Ashley Tarter, Environmental Specialist (Bionomics) Table of Contents Table of Contents .......................................................................................................................................................... 1 List of Figures ................................................................................................................................................................ 2 List of Tables ................................................................................................................................................................. 3 Appendices ................................................................................................................................................................... 3 Executive Summary ...................................................................................................................................................... 4 Chapter 1: Introduction ................................................................................................................................................ 7 1.1 Study Goals and Objectives ................................................................................................................................ 7 1.2 Study Process ...................................................................................................................................................... 7 1.3 Stakeholder and Public Involvement .................................................................................................................. 7 Chapter 2: Existing Conditions ...................................................................................................................................... 8 2.1 Existing Study Area Characteristics ..................................................................................................................... 8 2.2 Existing Utilities ................................................................................................................................................. 10 2.3 Existing Drainage Features ................................................................................................................................ 10 2.4 Previous Studies ................................................................................................................................................ 10 2.5 Environmental Overview .................................................................................................................................. 10 2.6 Initial Stakeholder and Public Input .................................................................................................................. 10 Chapter 3: Traffic Forecasts ........................................................................................................................................ 11 Chapter 4: Concept Development and Screening ...................................................................................................... 11 Chapter 5: Alternatives Development ........................................................................................................................ 15 5.1 Alternatives ....................................................................................................................................................... 16 Alternative 1 ....................................................................................................................................................... 16 Alternative 2 ....................................................................................................................................................... 18 5.2 Traffic Operations ............................................................................................................................................. 20 5.3 Key Issues .......................................................................................................................................................... 20 Cross Street Impacts ........................................................................................................................................... 20 Landfill Impacts and Risks ................................................................................................................................... 20 Drainage .............................................................................................................................................................. 21 Pedestrian Accommodations over the New York Canal ..................................................................................... 23 Truck Accommodations at Roundabouts............................................................................................................ 23 Roadway Ownership ........................................................................................................................................... 27 Utilities ................................................................................................................................................................ 27 Boise Airport Runway Protection Zone .............................................................................................................. 28 5.4 Alternatives Cost Estimates .............................................................................................................................. 29 Chapter 6: Evaluation of Alternatives ......................................................................................................................... 30 6.1 Public Involvement and Stakeholder Comments.............................................................................................. 30 6.2 Alternatives Evaluation ..................................................................................................................................... 30 Chapter 7: Recommended Alternative ....................................................................................................................... 36 7.1 Recommended Conceptual Drainage Design ................................................................................................... 37 Chapter 8: Recommended Phasing Sequence ............................................................................................................ 40 Phase 1 ................................................................................................................................................................ 40 Phase 2 ................................................................................................................................................................ 42 Phase 3 ................................................................................................................................................................ 43 Phase 4 ................................................................................................................................................................ 45 Phase 5 ................................................................................................................................................................ 46 Chapter 9: Next Steps ................................................................................................................................................. 47 Study ................................................................................................................................................................... 47 Preliminary Design .............................................................................................................................................. 47 Final Design ......................................................................................................................................................... 47 1 Right-of-Way Acquisition ...................................................................................................................................