The Fresno Trench is an approximately one mile long trench north of downtown Fresno that will carry high-speed trains under State Route 180, a rail spur, and an irrigation canal. The trench parallels Union Pacific freight tracks and includes an intrusion barrier wall to keep high-speed and Union Pacific trains separate. At its deepest point the trench will be about 40 feet below grade.
From approximately Olive Avenue to Stanislaus Street. Work on the trench has begun south of Belmont Avenue along with excavation beneath SR 180.
A little north of downtown Fresno, workers on the State Route 180 trench are tying rebar inside the section of the trench that crosses under the highway. This is the first step in creating the concrete box that will carry trains under SR 180, a rail spur and the Dry Creek Canal. When the rebar work is completed concrete will be poured to create a wall and floor of concrete about five feet thick.