Project Brief www.geocomp.com PB20180924 Parallel Thimble Shoal Tunnel Background & Project Challenges The Parallel Thimble Shoal Tunnel Project in Chesapeake Bay (CBBT), Virginia involves the construction of a new bored 1-mile, two- lane tunnel under Thimble Shoal Channel next to the existing two-lane tunnel. The new tunnel, 42 feet in diameter, will expand capacity and improve safety for travelers who use the CBBT The new tunnel will be constructed using a tunnel boring machine (TBM) that will advance from the new man-made portal island. For this project, Geocomp is providing the instrumentation and monitoring to monitor the existing facilities, as well as the temporary construction element needed to perform the tunneling in this unique environment. Geocomp Role & Accompli

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