Cornerstone Earth Group, Inc. recently attended the 𝗔𝗣𝗪𝗔 𝗦𝗶𝗹𝗶𝗰𝗼𝗻 𝗩𝗮𝗹𝗹𝗲𝘆/𝗔𝗦𝗖𝗘 𝗦𝗮𝗻 𝗝𝗼𝘀𝗲 joint luncheon at Michael’s at Shoreline in Mountain View, CA. The focus of the event was the 𝗕𝗔𝗥𝗧 𝗦𝗶𝗹𝗶𝗰𝗼𝗻 𝗩𝗮𝗹𝗹𝗲𝘆 Phase II Extension Project (BSVII Project), as presented by speaker 𝗞𝗿𝗶𝘀𝗵𝗻𝗮 𝗗𝗮𝘃𝗲𝘆, 𝗗𝗲𝗽𝘂𝘁𝘆 𝗗𝗶𝗿𝗲𝗰𝘁𝗼𝗿 of the BART Silicon Valley Program. Mr. Davey’s 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 VTA’s 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.