O New Collector Connector l Arctic Blvd Arctic Blvd to W. Dowling Rd. d S e w a r d New Bridge H ARRC Tracks and Arctic Blvd w T i n a y L a k Dowling Rd e C A Rovenna St M P New Bridge B Campbell Creek E C L M L S in t C n B e l u R s e L o a b Extend Road E t k e E a e r Rovenna to Raspberry r y K D r G R E E N W 68th Ave B E L T A B r l c Roadway Re-alignment v t d i I Raspberry to 68th Ave. c 0500250 Feet West Dowling Road Connection Project Revised Environmental Assessment & Programmatic Section 4(f)/6(f) Evaluation STP-0532(5)/55012 Prepared for: Federal Highway Administration Alaska Division On Behalf of the Sponsor Department of Transportation and Public Facilities Central Region Prepared by: HDR Alaska, Inc. 2525 C Street, Suite 305 Anchorage, Alaska 99503-2632 November 2007 Table of Contents 1.0 INTRODUCTION Purpose and Need 1-1 NEPA Process 1-4 Permits and Authorizations 1-5 2.0 DESCRIPTION OF THE PROPOSED ACTION AND ALTERNATIVES No Action Alternative 2-1 Proposed Action 2-2 Raspberry Dowling 2-56 S Curve 2-78 Frontage Road 2-910 Rovenna Frontage 2-1112 3.0 AFFECTED ENVIRONMENT AND CONSEQUENCES Physical Environment 3.1 Air Quality 3.1-1 3.2 Water Bodies 3.2-1 3.3 Floodplains 3.3-1 3.4 Water Quality 3.4-1 3.5 Coastal Zone 3.5-1 Biotic Environment 3.6 Vegetation 3.6-1 3.7 Wetlands 3.7-1 3.8 Fish and Essential Fish Habitat 3.8-1 3.9 Wildlife 3.9-1 3.10 Threatened & Endangered Species 3.10-1 Human Environment 3.11 Land Use and Zoning 3.11-1 3.12 Land Ownership 3.12-1 3.13 Socio-Economics 3.13-1 3.14 Transportation Systems 3.14-1 3.15 Noise 3.15-1 3.16 Archeology and Historic Preservation 3.16-1 3.17 Recreational Resources 3.17-1 3.18 Utilities 3.18-1 3.19 Contaminated Sites 3.19-1 3.20 Visual 3.20-1 3.21 Indirect and Cumulative Effects 3.21-1 3.22 Irretrievable and Irreversible Commitment of Resources 3.22-1 3.23 Local Short-Term Uses verses Long-Term Productivity 3.23-1 4.0 CONSULTATION AND COORDINATION 4-1 5.0 LIST OF PREPARERS 5-1 6.0 REFERENCES 6-1 PROGRAMMATIC SECTION 4(F)/6(F) EVALUATION List of Tables Table 3.1 – Floodplain Impacts 3.3-4 Table 3.2 – Wetlands 3.7-5 Table 3.3 – Wetland Impacts 3.7-5 Table 3.4 – Zoning 3.11-3 Table 3.5 – Racial Composition 3.13-3 Table 3.6 – Minority Status 3.13-3 Table 3.7 – Median Household Income (1999 dollars) 3.13-5 Table 3.8 – 2004 DHSS Poverty Guidelines for Alaska 3.13-5 Table 3.9 – Summary of Existing Ambient Noise Measurement 3.15-1 Results Table 3.10 – Noise Abatement Criteria 3.15-4 Table 3.11 – AM Peak Hour Noise Analysis Results 3.15-5 Table 3.12 – Contaminated Sites 3.19-1 Table 3.13 – Summary of Containments in Tina Lake 3.19-4 Table 4.1 – Summary of Issues and Responses 4-1 Table 4.2 – Summary of Comments Received during Comment Period and Responses 4-3 List of Figures Figure 1.1 – Study Area 1-2 Figure 2.1 – Proposed Action 2-3 Figure 2.2 – Typical Cross Section 2-2 Figure 2.3 – Campbell Creek Bridge 2-4 Figure 2.4 – Bridge Crossing Arctic Boulevard and Alaska Railroad Tracks 2-45 Figure 2.5 – Raspberry Dowling Concept 2-67 Figure 2.6 – S Curve Concept 2-89 Figure 2.7 – Frontage Road Concept 2-1011 Figure 2.8 – Rovenna Frontage Concept 2-1213 Figure 3.1 – Air Quality Maintenance Boundary 3.1-2 Figure 3.2 – Waterbodies 3.2-1 Figure 3.3 – Campbell Creek 3.2-1 Figure 3.4 – Tina Lake Storm Drain Outlet 3.2-2 Figure 3.5 – The approximate new Tina Lake Boundary 3.2-3 Figure 3.6 – Floodplains 3.3-2 Figure 3.7 – Campbell Creek Floodplain Impacts 3.3-4 Figure 3.8 – Tina Lake Floodplain Impacts 3.3-4 Figure 3.9 – Approximate Location of Proposed Drainage Swales 3.4-3 Figure 3.109 – Alaska Coastal Zone Boundary 3.5-1 Figure 3.1110 – Vegetation 3.6-2 Figure 3.1211 – Area of Re-vegetation 3.6-3 Figure 3.1312 – Components of a Wetland 3.7-2 Figure 3.1413 – Wetlands 3.7-3 Figure 3.1514 – Impacts to Wetlands near Tina Lake 3.7-6 Figure 3.1615 – Avoidance Alternative 3.7-9 Figure 3.1716 – Original Alignment 3.7-10 Figure 3.1817 – Minimization of Wetland Impacts in Tina Lake 3.7-10 Figure 3.1918 – Further minimization of Wetland Impacts 3.7-11 Figure 3.2019 – Percent of Land Use in the Study Area 3.11-1 Figure 3.2120 – Land Use 3.11-2 Figure 3.2221 – Anchorage 2020 Land Use 3.11-3 Figure 3.2322 – Zoning 3.11-4 Figure 3.2423 – Land Ownership 3.12-2 Figure 3.2524 – Anticipated Right of Way Acquisitions 3.12-3 Figure 3.2625 – Population by Census Block 3.13-2 Figure 3.2726 – Percent Minority 3.13-4 Figure 3.2827 – Median Household Income (1999 Dollars) 3.13-6 Figure 3.2928 – Median Household Income and the Poverty Level 3.13-7 Figure 3.3029 – Taku/Campbell Community Council 3.13-7 Figure 3.3130 – Impact of the Proposed Action on Census Block 2011, Block Group 2, Census Tract 25.02 3.13-9 Figure 3.3231 –The impact on Census Block 1006, Block Group 1, Census Tract 25.01 3.13-9 Figure 3.3332 – Road Classification from the Official Streets and Highways Plan 3.14-2 Figure 3.3433 – 2004 Average Daily Traffic Volumes 3.14-4 Figure 3.3534 – 2025 No Action Forecasted Average Daily Traffic Volume 3.14-5 Figure 3.3635 – 2025 No Action Forecasted V/C Ratio 3.14-6 Figure 3.3736 – 2025 Proposed Action Forecasted Average Daily Traffic Volume 3.14-7 Figure 3.3837 – 2025 Proposed Action Forecasted V/C Ratio 3.14-9 Figure 3.3938 – Difference in ADT 3.14-10 Figure 3.4039 – Noise Monitoring Sites 3.15-1 Figure 3.4140 – Noise Sensitive Receivers 3.15-3 Figure 3.4241 – Proposed Noise Wall Locations 3.15-8 Figure 3.4342 – Existing and Future Noise Levels at Chad Street 3.15-9 Figure 3.4443 – Recreational Resources 3.17-2 Figure 3.4544 – Cross Section of the Campbell Creek Trail Crossing 3.17-3 Figure 3.4645 – Impacts to Campbell Creek Greenbelt 3.17-4 Figure 3.4746 – Proposed Section 6(f) Mitigation 3.17-87 Figure 3.4847 – Chugach Electric 3.18-1 Figure 3.4948 – AWWU Sewer Pipes 3.18-2 Figure 3.5049 – AWWU Water Pipes 3.18-2 Figure 3.5150 – ENSTAR 3.18-3 Figure 3.5251 – Potentially Contaminated Sites 3.19-2 Figure 3.5352 – UST and LUST Sites 3.19-3 Figure 3.5453 – Approximate Location of Photos 3.20-1 Figure 3.5554 – View of Campbell Creek Crossing of Dowling Road from South Side of Trail 3.20-2 Figure 3.5655 – View of Campbell Creek Trail and Bridge Looking West on Dowling Road 3.20-2 Figure 3.5756 – View of the Alaska Railroad Crossing on Arctic Boulevard 3.20-3 Figure 3.5857 – View of Campbell Creek Bridge Looking East 3.20-3 Figure 3.5958 – Northern Edge of Tina Lake 3.20-4 Figure 3.6059 – Tina Lake looking South East 3.20-4 Figure 3.6160 – Existing Terminus of Raspberry Road 3.20-5 Figure 3.6261 – Cumulative Impact Boundary 3.21-2 Figure 3.6362 – Tina Lake in 1950 3.21-2 Figure 3.6463 – Tina Lake in 1975 3.21-3 Appendices Plan Set A Scoping Summary Report B Air Quality C Hydrology, Hydraulics, and Drainage D Wetlands E Essential Fish Assessment and Bird Survey F Conceptual Stage Relocation Report G Noise Study H Archeology and Historic Preservation I Contaminated Sites J Draft Permits K Environmental Assessment Review and Other Coordination L ACRONYMS ACMP Alaska Coastal Management Program ACS Alaska Communications Systems ADA Americans with Disabilities Act ADEC Alaska Department of Environmental Conservation ADF&G Alaska Department of Fish and Game ADNR Alaska Department of Natural Resources ADT average daily traffic AFD Anchorage Fire Department AHRS Alaska Heritage Resources Survey AMATS Anchorage Metropolitan Area Transportation Solutions ARRC Alaska Railroad Corporation AS Alaska Statutes AWWU Anchorage Water and Wastewater Utility BMP Best Management Practice CEA Chugach Electric Association CFR Code of Federal Regulations CMP Coastal Management Plan CO Carbon Monoxide CWA Clean Water Act dB[A] decibels using the A-weighted scale DOT&PF Alaska Department of Transportation and Public Facilities DRO diesel range organic EA Environmental Assessment EFH Essential Fish Habitat EIS Environmental Impact Statement EPA Environmental Protection Agency FEMA Federal Emergency Management Agency ESCP Erosion and Sediment Control Plan FHWA Federal Highway Administration FONSI Finding of No Significant Impact GCI General Communications Inc. GIS geographic information system ISA Initial Site Assessment kV kilovolt Leq(h) sound level occurring over a 1-hour period LRTP long-range transportation plan LUST Leaking Underground Storage Tank LWCF Land and Water Conservation Fund MOA Municipality of Anchorage MSFCMA Magnuson-Stevens Fishery Conservation and Management Act NAAQS National Ambient Air Quality Standards NAC Noise Abatement Criteria NEPA National Environmental Policy Act NHPA National Historic Preservation Act NO2 Nitrogen Dioxide NOAA Fisheries National Oceanic and Atmospheric Administration, NPDES National Pollutant Discharge Elimination System OPMP Office of Project Management and Permitting OS&HP Official Streets and Highways Plan Pb Lead PM Particulate Matter ROW Right-of-Way RRO residual range organic SHPO State Historic Preservation Office SIP state implementation plan SO2 Sulfur Dioxide SWPPP Storm Water Pollution Prevention Plan TMDL Total Maximum Daily Load TNM Traffic Noise Model USACE US Army Corps of Engineers USC U.