FEIS Summary - Knik Arm Bridge and Toll Authority

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Knik Arm Crossing Final EIS Summary Exhibit S-23 Environmental Impacts Associated with Construction and Operation of the Recommended Alternative (continued) Impact category Indirect impacts Cumulative impacts Northern Access Alternative (Mat-Su Side) VMT b and VHT c will increase in Mat-Su compared with the No Build. A shift in population will cause an increase in traffic on some roads in the Mat-Su and a decrease on others between Palmer and Wasilla. Impacts on Community Facilities, Public Services, and Fiscal Conditions Direct impacts Construction impacts Indirect impacts Cumulative impacts Impacts on Population and Social Groups Direct impacts Construction impacts Indirect impacts Cumulative impacts Subsistence Impacts Direct impacts b VMT (million vehicle miles traveled) c VHT (million vehicle hours traveled) Recommended Alternative Southern Alignment Crossing with 8,200-Foot Bridge and Connecting Roadways on Gravel Fill (The Crossing) The Recommended Alternative has been designed to be compatible with a future rail alignment crossing Knik Arm. No indirect impacts on air transportation will occur. Increased opportunity for transit operations between Anchorage and the Mat Su. The depth of Knik Arm currently limits the development or expansion of commercial marine operations north of the project and the project will have minimal effect on future development or expansion. None Erickson Alternative (Anchorage Side) VMT and VHT will decrease in Anchorage compared with the No Build. Improved access to Southwest and West Mat-Su will increase residential, commercial, and industrial development and supporting infrastructure. More truck freight traffic and more recreation-related traffic will follow. Increased traffic volumes and VMT will cause increased pressure to widen and pave roadways in West Mat-Su. Pressure for construction of a spur railroad line from Wasilla and/or the Parks Highway to Port MacKenzie to serve freight and commuters may increase. Short-term impacts include staging of construction materials, preconstruction facilities, and mobilization areas. These short-term preconstruction activities will have beneficial financial effects from revenues. Land purchases for the project will reduce the taxable value of the property and future tax revenues associated with the land. Land lease revenues of the Alaska Railroad Corporation (ARRC) will be reduced for land that will be taken. Growth in the Mat-Su will pose fiscal challenges to the Borough. Additional residential growth in the Mat-Su area will result in increased expenses for education and other public services. Increase in population will increase demand for public services of the Borough and the cities of Wasilla, Palmer, and Houston. Transportation linkages and utility connections will follow areas of growth. Population growth in Anchorage can be accommodated by existing and planned capacity of public services and facilities. As a result of the loss of business, residential, and other property within the ROW on Government Hill, a small loss of population from the Government Hill neighborhood could occur. The influx of construction workers will generate temporary effects on populations in the region. Regional population growth will be similar to the case without the KAC Project; there will, however, be impacts on spatial allocation of population across the region. Operation of the KAC Project and its associated traffic will result in some long-term displacement of hunting activities along the road corridors. Operation of the KAC Project and its associated traffic will affect moose, primarily by increases in mortality through vehicle collisions. N/A None None . (continued on next page) Exhibit S-23 Environmental Impacts Associated with Construction and Operation S-38
Knik Arm Crossing Final EIS Summary Exhibit S-23 Environmental Impacts Associated with Construction and Operation of the Recommended Alternative (continued) Impact category Construction impacts Indirect impacts Cumulative impacts Impacts on Utilities Direct impacts Construction impacts Indirect impacts Cumulative impacts Relocation Impacts Direct impacts Construction impacts Indirect impacts Cumulative impacts Joint Development Impacts Direct impacts Construction impacts Indirect impacts Cumulative impacts Northern Access Alternative (Mat-Su Side) Construction activities will displace moose (short-term) and traditional moose hunting activities in the immediate vicinity. Recommended Alternative Southern Alignment Crossing with 8,200-Foot Bridge and Connecting Roadways on Gravel Fill (The Crossing) Short-term localized direct effects on both adult and juvenile salmon during construction could alter fish movement patterns. Short-term construction activities in marine and nearshore environments could affect beluga behavior, movement patterns, and foraging success through noise disturbance as well as through effects on their prey. Fish and wildlife populations used for traditional harvest will experience some minor adverse effects from development projects. Development on west side of Knik Arm could make it more difficult for Knik Arm Dena’ina to gain access to their hunting grounds and educational fishery. Several surface and subsurface utilities, including water, sewer, gas, electric utilities, communications, and fuel lines will require relocation prior to construction. Erickson Alternative (Anchorage Side) Indirect and cumulative demand on utilities will result in a more dispersed, regional development pattern; larger total infrastructure commitment; and greater gas, electric, water and sewer, and communication needs. The new bridge will provide an option for utility companies to lease space beneath the bridge decking for hanging pipes or cables for passage over Knik Arm to connect the Mat-Su and Anchorage. ROW Acquisition of Structures 0 structures Affected Land Parcels 28 ROW Costs $0.6M None N/A N/A None ROW Acquisition of Structures 18 structures • 9 residential (16 families) • 4 commercial (4 businesses) • 5 industrial (6 businesses) Affected Land Parcels 40 ROW Costs $11.5M Temporary Relocation • 1 business Indirect and cumulative impacts will be negligible. Property acquisitions and relocations will effectively reduce the housing supply in Anchorage to a relatively small degree and may be offset by new housing opportunities in the Mat-Su. None (continued on next page) Exhibit S-23 Environmental Impacts Associated with Construction and Operation S-39
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 and 34: The preliminary design includes pla
Page 35 and 36: Summary Initial Construction (Phase
Page 37: Knik Arm Crossing Final EIS Summary

FEIS Summary - Knik Arm Bridge and Toll Authority

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