MTGL Testing Laboratories

With so much of the work on the Project taking place deep underground, it is important to closely monitor the surroundings. That's where MTGL Testing Laboratories comes in. The Disadvantaged Business Enterprise (DBE) certified firm has been testing and inspecting soil and other materials for 27 years.

On the Project specifically, MTGL is tasked with daily testing of the tunnel's soil to confirm that it meets compaction specifications that ensure safety throughout construction. As the TBMs progress underground, curved pre-cast concrete walls are installed to form the interior walls of the subway tunnel. MTGL also tests and inspects the grout used during installation of these walls to check safe conformance.

MTGL has been operating in Southern California for nearly three decades and has three fully certified laboratories to conduct geotechnical analysis. The firm discovered an opportunity to work on this project through a Los Angeles County Metropolitan Transportation Authority (Metro) newsletter (like this one!), then followed up with a direct phone call to Frontier-Kemper that eventually led to a contract. Working so far beneath the surface can be challenging, but MTGL is grateful for the chance to work on a premier project for Metro.