Cornerstone Earth Group, Inc. recently attended the ๐๐ฃ๐ช๐ ๐ฆ๐ถ๐น๐ถ๐ฐ๐ผ๐ป ๐ฉ๐ฎ๐น๐น๐ฒ๐/๐๐ฆ๐๐ ๐ฆ๐ฎ๐ป ๐๐ผ๐๐ฒ joint luncheon at Michaelโs at Shoreline in Mountain View, CA. The focus of the event was the ๐๐๐ฅ๐ง ๐ฆ๐ถ๐น๐ถ๐ฐ๐ผ๐ป ๐ฉ๐ฎ๐น๐น๐ฒ๐ Phase II Extension Project (BSVII Project), as presented by speaker ๐๐ฟ๐ถ๐๐ต๐ป๐ฎ ๐๐ฎ๐๐ฒ๐, ๐๐ฒ๐ฝ๐๐๐ ๐๐ถ๐ฟ๐ฒ๐ฐ๐๐ผ๐ฟ of the BART Silicon Valley Program. Mr. Daveyโs recent accomplishments include the successful commissioning of the first phase and the development of technical requirements for the second phase of BART extension into Santa Clara County, which are multi-billion dollar infrastructure projects, and led VTAโs effort in the development of alternative tunneling for transit, the single-bore tunnel. The decision to adopt the single-bore alternative involved several steps, a few of them unique, and multiple stakeholders including regulatory bodies. This is the first single-bore tunnel in the world for heavy rail transit.