Construction of the stadium was completed within budget and time. When the venue opened it had a capacity for 42,500 and a natural grass turf. Unlike most other major stadiums in Canada, Commonwealth Stadium elected for a natural grass turf. The original configuration included 39,384 bucket seats and 3,200 bench seating on the north end. The venue was officially opened on July 15, 1978 in an event which attracted 15,000 spectators. The venue went through a slight expansion in 1980, when the seating capacity was increased to 43,346. Additional proposals for a roof, ranging from $10 to $32 million in cost, were presented in 1979, but since then the discussion of covering the stadium died out.