The Fresno Trench is an approximately one mile long trench north of downtown Fresno that will carry high-speed trains under State Route (SR) 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. The Fresno Trench begins south of Belmont Avenue running beneath SR 180.
Just outside of downtown Fresno, crews have completed the walls, floor and lid of the Fresno Trench and are now placing concrete for the intrusion protection barrier walls that will separate the high-speed rail corridor and Union Pacific Railroad. Meanwhile below SR 180, backfilling and reconstruction of eastbound lanes are taking place as crews prepare for the next stage of work that will reconstruct the number 1 and 2 lanes of SR 180 going east and westbound.