USC set out to overhaul the 1923 Los Angeles Memorial Coliseum with a new structure that would include suites, a concourse, and a press box.
Hathaway Dinwiddie began construction the day after the last Rams game in 2017. Existing stadium seating rested on grade with tunnels leading from the exterior to the field.
Demolition and excavation limits were kept tight to protect stadium seating outside the new work area. The excavation exposed existing tunnels and elements from prior retrofit work.
Historical and retrofit drawings were incorporated into the shoring coordination. Existing entrance stairs were supported from the shoring and cantilevered over the excavation during construction.
Calex Engineering installed the shoring system and helped coordinate unexpected field conditions not shown on the as-built drawings.
