FEIS Summary - Knik Arm Bridge and Toll Authority
FEIS Summary - Knik Arm Bridge and Toll Authority
FEIS Summary - Knik Arm Bridge and Toll Authority
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<strong>Knik</strong> <strong>Arm</strong> Crossing Final EIS<br />
<strong>Summary</strong><br />
Exhibit S-23 Environmental Impacts Associated with Construction <strong>and</strong> Operation of the Recommended Alternative (continued)<br />
Impact category<br />
Construction impacts<br />
Indirect impacts<br />
Cumulative impacts<br />
Impacts on the Cultural Environment<br />
Impacts on Archaeology <strong>and</strong> Historic Preservation<br />
Direct impacts<br />
Construction impacts<br />
Indirect impacts<br />
Cumulative impacts<br />
Impacts on Recreational Resources, Parks, <strong>and</strong> Wildlife Refuges<br />
Direct impacts<br />
Construction impacts<br />
Northern Access Alternative<br />
(Mat-Su Side)<br />
Recommended Alternative<br />
Southern Alignment Crossing with 8,200-Foot <strong>Bridge</strong> <strong>and</strong> Connecting<br />
Roadways on Gravel Fill<br />
(The Crossing)<br />
Erickson Alternative<br />
(Anchorage Side)<br />
Temporary increases in nonpoint <strong>and</strong> point source contamination could occur during construction as a result of improper storage or spills of hazardous materials within aquifer recharge<br />
areas.<br />
Increased residential <strong>and</strong> business development may adversely affect the<br />
area including:<br />
• aquifers through both point source <strong>and</strong> nonpoint source<br />
• street maintenance practices such as oiling roads for dust control<br />
affecting nearby shallow groundwater resources<br />
• increased vulnerability to bacteria, viruses, nitrates, <strong>and</strong> nitrites in areas<br />
with shallow ground water<br />
• bacteria <strong>and</strong> nutrients from livestock or pet wastes<br />
• sediment from mining or construction<br />
• fertilizers from agricultural <strong>and</strong> new residential areas<br />
N/A<br />
A deceleration in development growth will likely reduce water use within<br />
the Anchorage Bowl <strong>and</strong> reduce the rate of increase of drawdown of<br />
Anchorage-area aquifers.<br />
The KAC Project, along with reasonably foreseeable future actions in the Mat-Su Borough, will add to the general decline in ground water quality. Wastewater generation <strong>and</strong> residential<br />
water consumption will approximately triple existing rates by 2030. The prevalence of community or municipal stations will be critical for ground water resources.<br />
None<br />
Indirect <strong>and</strong> cumulative impacts will occur due to shifts in growth <strong>and</strong> development.<br />
None<br />
None<br />
None<br />
None<br />
None<br />
Direct impacts on the Government Hill Urban Renewal Historic District<br />
could include visual <strong>and</strong> audible elements as part of Phase 1 <strong>and</strong> 2. Noise<br />
impacts will not exceed FHWA abatement criteria.<br />
Three contributing properties in the Government Hill Urban Renewal<br />
Historic District will be adversely effected as part of Phase 2 due to<br />
acquisition.<br />
Harvard Park<br />
The KAC Project would result in:<br />
2% of park used<br />
0.10 acre of ROW acquired<br />
4.55 acres remaining<br />
Sunset Park<br />
The KAC Project would result in:<br />
31% of park used<br />
1.70 acres of ROW acquired<br />
3.75 acres remaining<br />
Harvard <strong>and</strong> Sunset Parks<br />
Parks may be temporarily unavailable to the public during construction.<br />
(continued on next page)<br />
Exhibit S-23 Environmental Impacts Associated with Construction <strong>and</strong> Operation<br />
S-42