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>Summary</strong><br />
Initial Construction (Phase 1) Potential Future Expansion (Phase 2)<br />
to BRIDGE<br />
to BRIDGE<br />
to BRIDGE<br />
Degan Cut-<strong>and</strong>-Cover Tunnel<br />
• Includes a four-lane, cut-<strong>and</strong>-cover tunnel.<br />
• Access to/from the facility would require a stop<br />
<strong>and</strong> a turn.<br />
• A traffic signal would control the intersection with<br />
East Loop Road.<br />
EAST LOOP ROAD<br />
Erickson Cut-<strong>and</strong>-Cover Tunnel<br />
• Would include a two-lane, cut-<strong>and</strong>-cover tunnel.<br />
• On/off ramps constructed north <strong>and</strong> south of<br />
Government Hill.<br />
• Traffic would flow freely between East Loop Road<br />
<strong>and</strong> the facility (no traffic signal required).<br />
The preliminary design includes plans for potential future expansion (Phase 2) when traffic volumes would<br />
warrant its completion. In Anchorage, exp<strong>and</strong>ing the project would mean adding a connection to the<br />
Ingra‐Gambell Couplet <strong>and</strong> the future Highway-to-Highway Project with the Glenn <strong>and</strong> Seward Highways.<br />
These potential future expansions are noted above.<br />
EAST LOOP ROAD<br />
Degan Cut-<strong>and</strong>-Cover Tunnel<br />
to INGRA -<br />
GAMBELL<br />
• Signal intersection at East Loop Road would be replaced with a grade<br />
separation, allowing traffic to flow freely (no stops) through the tunnel<br />
<strong>and</strong> to/from the Ingra‐Gambell Couplet.<br />
• No direct access would be available between Government Hill <strong>and</strong> the<br />
Ingra‐Gambell Couplet.<br />
• Traffic to/from East Loop Road would gain access to the facility by way<br />
of Erickson Street <strong>and</strong> ramps north of Government Hill.<br />
EAST LOOP ROAD<br />
Erickson Cut-<strong>and</strong>-Cover Tunnel<br />
to INGRA -<br />
GAMBELL<br />
• Would exp<strong>and</strong> to a six-lane, cut-<strong>and</strong>-cover tunnel.<br />
• A wider tunnel would allow main line traffic to flow freely through the tunnel<br />
to/from the Ingra‐Gambell Couplet, as well as ramp traffic to flow freely<br />
through the tunnel to/from East Loop Road.<br />
• On/off ramps would be exp<strong>and</strong>ed north of Government Hill.<br />
• No direct access would be available between Government Hill <strong>and</strong> the<br />
Ingra‐Gambell Couplet.<br />
Exhibit S-18 Anchorage Side Alternatives – Traffic flow<br />
Exhibit S-18 Anchorage Side Alternatives – Traffic flow<br />
S-35