PRELIMINARY ENGINEERING REPORT Roosevelt Drive Upgrade Study MT BSilver Bow 2016(9) IDIQ Contract No. DTFH7015D00007 Task Order No. 69056719F000080 DRAFT Prepared for: WESTERN FEDERAL LANDS HIGHWAY DIVISION 610 East Fifth Street, Vancouver, WA 98661 Aug. 08, 2019 Prepared by: ROBERT PECCIA & ASSOCIATES Helena, Montana Roosevelt Drive Upgrade Study, MT BSilver Bow 2016(9) TABLE OF CONTENTS Table of Contents ......................................................................................................................... i List of Tables ............................................................................................................................................. ii List of Figures ........................................................................................................................................... ii List of Appendices .................................................................................................................................... iii Abbreviations/Acronyms .......................................................................................................... iv 1.0. Introduction and Background .............................................................................................. 1 1.1. Study Area ........................................................................................................................................ 1 1.2. Historic Construction and Improvements .......................................................................................... 2 1.3. Existing Plans and Regulations ........................................................................................................ 3 1.4. Current and Planned Projects ........................................................................................................... 4 2.0. Transportation Conditions ................................................................................................... 5 2.1. Physical Features and Characteristics ............................................................................................. 5 2.1.1. Hydraulics .................................................................................................................................... 5 2.1.2. Bridges ........................................................................................................................................ 5 2.1.3. Culverts ....................................................................................................................................... 5 2.1.4. Access Points .............................................................................................................................. 6 2.1.5. Roadway Surfacing ..................................................................................................................... 7 2.1.6. Maintenance and Operations ...................................................................................................... 9 2.1.7. Right-of-Way ............................................................................................................................. 10 2.1.8. Utilities ....................................................................................................................................... 11 2.1.9. Recreational Opportunities ........................................................................................................ 11 2.2. Geometric Conditions ..................................................................................................................... 12 2.2.1. Design Criteria ........................................................................................................................... 12 2.2.2. Horizontal Alignment ................................................................................................................. 14 2.2.3. Vertical Alignment ..................................................................................................................... 14 2.2.4. Intersection Alignment ............................................................................................................... 15 2.2.5. Sight Distance ........................................................................................................................... 15 2.2.6. Clear Zone ................................................................................................................................. 16 2.3. Traffic Conditions ............................................................................................................................ 16 2.3.1. Existing Traffic Volumes ............................................................................................................ 16 2.3.2. Projected Traffic Volumes ......................................................................................................... 16 2.3.3. Heavy Vehicle Traffic ................................................................................................................ 17 2.3.4. Alternative Transportation Modes ............................................................................................. 17 2.4. Safety .............................................................................................................................................. 17 2.4.1. Safety Trends, Contributing Factors, and Crash Clusters ........................................................ 18 2.5. Other Vulnerabilities........................................................................................................................ 19 3.0. Environmental Setting .......................................................................................................22 3.1. Physical Environment ..................................................................................................................... 22 3.1.1. Land Ownership and Land Use ................................................................................................. 22 3.1.2. Soil Resources and Prime Farmland ........................................................................................ 22 3.1.3. Geologic Hazards ...................................................................................................................... 23 3.1.4. Surface Waters .......................................................................................................................... 23 3.1.5. Groundwater .............................................................................................................................. 24 3.1.6. Floodplains and Floodways ....................................................................................................... 24 DRAFT Preliminary Engineering Report August 08, 2019 i Roosevelt Drive Upgrade Study, MT BSilver Bow 2016(9) 3.1.7. Wetlands and Waters of the U.S. .............................................................................................. 24 3.1.8. Hazardous Substances ............................................................................................................. 24 3.1.9. Air Quality .................................................................................................................................. 25 3.1.10. Noise ....................................................................................................................................... 25 3.2. Biological Resources ...................................................................................................................... 25 3.2.1. Vegetation ................................................................................................................................. 25 3.2.2. Fish and Wildlife ........................................................................................................................ 25 3.2.3. Threatened and Endangered Species ...................................................................................... 26 3.2.4. Other Species of Concern ......................................................................................................... 26 3.3. Social and Cultural Resources ....................................................................................................... 26 3.3.1. Demographic and Economic Conditions ................................................................................... 26 3.3.2. Recreational Resources ............................................................................................................ 27 3.3.3. Cultural and Historic Resources ................................................................................................ 28 3.3.4. Visual Resources ...................................................................................................................... 28 4.0. Areas of Concern Summary ..............................................................................................29 4.1. Transportation Conditions ............................................................................................................... 29 4.2. Environmental Setting ..................................................................................................................... 30 5.0. Goals and Objectives ........................................................................................................32 6.0. Improvement Options ........................................................................................................34 6.1. Option 1: Rehabilitation