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 Economic Impacts Impacts on Employment Direct impacts Construction impacts Indirect impacts Cumulative impacts Impacts on Economic Sectors Direct impacts Construction impacts Indirect impacts Cumulative impacts Impacts on the Physical Environment Air Quality Impacts Direct impacts Northern Access Alternative (Mat-Su Side) Recommended Alternative Southern Alignment Crossing with 8,200-Foot Bridge and Connecting Roadways on Gravel Fill (The Crossing) Project-related design and engineering activity ($30M to $37.5M) will occur before construction. This will mean 300 to 400 part- and full-time jobs, over a two-year period prior to construction, primarily in the architectural and engineering sectors. Labor income from such activities will range from $19M to $24M. 60 part- and full-time jobs will be supported during the project’s operational phase, with a labor income of $2.7M. Erickson Alternative (Anchorage Side) Dislocation impacts (four businesses and seven industrial properties) and possible loss of employment will be focused on the Government Hill neighborhood. Temporary and short-term interruptions of business activity will occur. Anticipated level of construction-related spending in region will be $220M to $280M. 4,400 to 6,200 part-and full-time construction jobs will be needed over 24 months or 2,200 to 3,100 jobs per year. Total income for construction jobs will be $309M to $328M. Workers for the 1,700 to 3,100 jobs per year will be nonlocal hires. About 150–200 indirect jobs will be generated in the regional economy during design and engineering stages of the KAC Project, with a labor income of $5.3 to $7.1M. During construction, 2,160–3,080 indirect jobs, with a labor income of $67.1 to $94.2M, will occur. In the operation phase, about 50 indirect jobs will be generated, with a labor income of $2M. An increasing share (about 2%, or 6,700 jobs, compared with a projected 2030 level without the project) of retail and services employment growth in the region will be allocated to the Mat-Su. The KAC project will create economic efficiencies for locations in the Mat-Su of warehousing, transportation services, industrial land uses, and accommodations of residential population growth. Operation of the project will add about $8M in operation and maintenance activities and repair sector as well as state and local government sectors. Construction spending is expected to create an increase in economic activity $210 to $285 million in the local construction sector during the construction phase of the project. Multiplier effects of project spending in the regional economy will be expected in the construction, engineering and architectural, and state and local government sectors, These will further propagate into the retail, professional and business services, and personal services sectors. Purchase of construction materials (e.g., structural steel) from out-of-state will involve an indirect economic benefit for local wholesale, water, air, and truck transportation sectors. Nonlocal hires during construction are expected to spend $55M in the local retail and personal services sectors. New gravel extraction sites could be opened in the southwest Mat-Su and offer new transportation and marketing opportunities such as direct truck delivery of gravel from quarries to the north end of Anchorage. A modest shift in basic sector activity, limited to warehousing and other businesses that require large tracts of land, could occur from Anchorage to Point MacKenzie. Paving of unpaved roads in the Mat-Su Borough is expected to reduce fugitive dust emissions. Expected to reduce vehicle miles traveled in the existing carbon monoxide (CO) maintenance area; therefore, the KAC Project will maintain compliance with the NAAQS for CO in Anchorage. No exceedances of the National Ambient Air Quality Standards (NAAQS) are expected. (continued on next page) Exhibit S-23 Environmental Impacts Associated with Construction and Operation S-40
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 Impacts on Noise Levels Direct impacts Construction impacts Indirect impacts Cumulative impacts Geology/Soils/Seismic Impacts Direct impacts Construction impacts Indirect impacts Cumulative impacts Northern Access Alternative (Mat-Su Side) Recommended Alternative Southern Alignment Crossing with 8,200-Foot Bridge and Connecting Roadways on Gravel Fill (The Crossing) A direct effect from earthmoving activities and construction equipment traveling over unpaved areas will be the release of particulate matter into the immediate environment. Construction equipment engine exhaust effects will occur, such as gaseous pollutants, and will include sulfur dioxide, nitrogen oxides, CO, and volatile organic compounds. Erickson Alternative (Anchorage Side) The air quality evaluation conducted for the project accounts for the cumulative air quality impacts of the project together with other projects of regional significance. The project and other projects of regional significance would not cause any exceedances of the National Ambient Air Quality Standards (NAAQS). There will be a 6- to 7-dBA increase over existing noise levels at noise sensitive receptors; however, the project will not approach or exceed noise abatement criteria. There will be short-term noise impacts. Impacts Relating to Hazardous Materials and Contaminated Sites Direct impacts Construction impacts Indirect impacts Cumulative impacts Impacts on Energy Resources Direct impacts Construction impacts Indirect impacts Cumulative impacts Impacts on Ground Water Direct impacts Conversion of undeveloped land to residential, retail, educational, commercial, industrial, etc., uses will increase background noise levels and create sensitive receptors where they currently do not exist. Seismic risk will be minimized by adherence to Alaska-specific and national design codes. No known contaminated sites. There is a possibility of encountering unexploded ordnance (UXO). None There will be short-term noise impacts and strong pulses of underwater sound due to pile-driving. Negligible impacts The Below-the-Bluff Roadway will have potential impacts on 3 low-risk hazardous materials sites. The eastern bridge abutment may affect known ordnance and explosives (OE) from the Former Susitna Gunner Range (FSGR). Short-term impacts will result from fuel consumption during construction and embedded energy in construction materials. None Negligible impacts There will be a 2- to 5-dBA increase over existing noise levels at noise sensitive receptors; however, the project will not approach or exceed noise abatement criteria. There will be short-term noise impacts. 3 high-risk sites 4 medium-risk sites 3 low-risk sites The KAC Project and reasonably foreseeable future actions will result in a more dispersed regional development pattern and greater total fuel consumption than would occur without the project. None (continued on next page) Exhibit S-23 Environmental Impacts Associated with Construction and Operation S-41
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 39: Knik Arm Crossing Final EIS Summary

FEIS Summary - Knik Arm Bridge and Toll Authority

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