Design & Construction Details

Allegheny Tunnel Design & Construction Details

Transportation Improvement Project

Environmental Document

The Pennsylvania Turnpike Commission's Allegheny Tunnel Transportation Improvement Project Environmental Document was finalized in November 2021.  The preferred alternative was identified as the Gray Cut Alternative. The Gray Cut Alternative was selected as the project preferred alternative because as it best balances all the operational, safety, cost, and environmental considerations that are components of the project. 

Preliminary Design of the Gray Cut Alternative will commence in early 2023.

Title Type Size Action
Allegheny Tunnel Environmental Document  PDF 16615 KB Download
Appendix A  PDF 6493 KB Download
Appendix B  PDF 7871 KB Download
Appendix C  PDF 3637 KB Download
Appendix D  PDF 14733 KB Download
Appendix E  PDF 14536 KB Download
Appendix F, Figures F-10A to F10G  PDF 31997 KB Download
Appendix F, Figures F-1A to F1G  PDF 38910 KB Download
Appendix F, Figures F-2A to F2G  PDF 38148 KB Download
Appendix F, Figures F-3A to F3G  PDF 39979 KB Download
Appendix F, Figures F-4A to F4G  PDF 37724 KB Download
Appendix F, Figures F-5A to F5G  PDF 38313 KB Download
Appendix F, Figures F-6A to F6G  PDF 38674 KB Download
Appendix F, Figures F-7A to F7G  PDF 33800 KB Download
Appendix F, Figures F-8A to F8G  PDF 33648 KB Download
Appendix F, Figures F-9A to F9G  PDF 38599 KB Download
Appendix G, Figure G-1  PDF 568 KB Download
Appendix G, Figure G-2  PDF 1191 KB Download
Appendix G, Figure G-3  PDF 3021 KB Download
Appendix H  PDF 36419 KB Download
Appendix I  PDF 232 KB Download
Appendix J  PDF 8510 KB Download
Appendix K, Table K-1  PDF 87 KB Download
Appendix K, Table K-2  PDF 242 KB Download
Appendix K, Table K-3  PDF 106 KB Download

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Project Overview

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