FEIS Summary - Knik Arm Bridge and Toll Authority

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Summary Degan Street Alternative Key Costs and Impacts for Anchorage Approach Alternatives Erickson Street Alternative North 0 0.5 1 Mile Costs Construction Design, engineering, and construction administration Contingency Total (by phase) (Note that Phase 2 would include future build-out of project through 2030) Degan Alternative Phase 1: $38.9M Phase 2: 144.7M Phase 1: 5.6M Phase 2: 21.0M Phase 1: 12.2M Phase 2: 52.3M Phase 1: 56.7M Phase 2: 218.0M Erickson Alternative Phase 1: $43.5M Phase 2: 155.3M Phase 1: 6.3M Phase 2: 22.5M Phase 1: 13.3M Phase 2: 56.6M Phase 1: 63.1M Phase 2: 234.4M Controlled-Access Right-of-way (ROW): A designation that allows intersecting roads or driveways at only limited points to promote safety and travel efficiency. ROW costs $18.0M $11.5M Affected land parcels 42 40 Permanent ROW acquisitions (relocations) (The number of acquisitions may be less than the number of relocations because a single building acquired may mean multiple families/businesses are relocated) Temporary ROW impacts (Adversely affected entities have the option of being acquired or temporarily relocated, with compensation) 8 residences (14 families) 2 businesses (2 businesses) 2 nonprofits (2 organizations) 5 industrial buildings (6 businesses) 2 residences (3 families) 1 nonprofit (1 business) 9 residences (16 families) 4 businesses (4 businesses) 5 industrial buildings (6 businesses) 1 business (1 business) Total potential relocations 28 (Phases 1 and 2) 27 (Phases 1 and 2) Hazardous waste/Contaminated sites Historic properties Section 4(f) Recreational Properties Harvard Park Sunset Park Wetlands 3 high-risk sites 4 medium-risk sites 3 low-risk sites Adversely affects Anchorage Square & Round Dance Club 65% of park used 3.0 acres of ROW acquired 1.65 acres remaining 59% of park used 3.21 acres of ROW acquired 2.24 acres remaining 3 high-risk sites 4 medium-risk sites 3 low-risk sites Adversely affects Government Hill Urban Renewal Historic District including 3 contributing structures 2% of park used 0.10 acre of ROW acquired 4.55 acres remaining 31% of park used 1.70 acres of ROW acquired 3.75 acres remaining Forested 1.6 acres 1.3 acres Sedge and grass 1.1 acres 2.2 acres Scrub/shrub 7.9 acres 7.6 acres Total 10.6 acres 11.1 acres North 0 0.5 1 Mile Exhibit S-17 Anchorage Side Alternatives Exhibit S-17 Anchorage Side Alternatives S-34
Summary Initial Construction (Phase 1) Potential Future Expansion (Phase 2) to BRIDGE to BRIDGE to BRIDGE Degan Cut-and-Cover Tunnel • Includes a four-lane, cut-and-cover tunnel. • Access to/from the facility would require a stop and a turn. • A traffic signal would control the intersection with East Loop Road. EAST LOOP ROAD Erickson Cut-and-Cover Tunnel • Would include a two-lane, cut-and-cover tunnel. • On/off ramps constructed north and south of Government Hill. • Traffic would flow freely between East Loop Road and the facility (no traffic signal required). The preliminary design includes plans for potential future expansion (Phase 2) when traffic volumes would warrant its completion. In Anchorage, expanding the project would mean adding a connection to the Ingra‐Gambell Couplet and the future Highway-to-Highway Project with the Glenn and Seward Highways. These potential future expansions are noted above. EAST LOOP ROAD Degan Cut-and-Cover Tunnel to INGRA - GAMBELL • Signal intersection at East Loop Road would be replaced with a grade separation, allowing traffic to flow freely (no stops) through the tunnel and to/from the Ingra‐Gambell Couplet. • No direct access would be available between Government Hill and the Ingra‐Gambell Couplet. • Traffic to/from East Loop Road would gain access to the facility by way of Erickson Street and ramps north of Government Hill. EAST LOOP ROAD Erickson Cut-and-Cover Tunnel to INGRA - GAMBELL • Would expand to a six-lane, cut-and-cover tunnel. • A wider tunnel would allow main line traffic to flow freely through the tunnel to/from the Ingra‐Gambell Couplet, as well as ramp traffic to flow freely through the tunnel to/from East Loop Road. • On/off ramps would be expanded north of Government Hill. • No direct access would be available between Government Hill and the Ingra‐Gambell Couplet. Exhibit S-18 Anchorage Side Alternatives – Traffic flow Exhibit S-18 Anchorage Side Alternatives – Traffic flow S-35
Page 1 and 2: Knik Arm Crossing Final Environment
Page 3 and 4: Exhibit S‐1. Final EIS Document O
Page 5 and 6: Knik Arm Crossing Final EIS Summary
Page 15 and 16: Exhibit S‐22. Reasons for Preferr
Page 17 and 18: Findings, Compliance, and Permits E
Page 25 and 26: ! ! ! ! ! ! ! ! ! ! ! ! Knik Arm Cr
Page 33: The preliminary design includes pla

FEIS Summary - Knik Arm Bridge and Toll Authority

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