Designed for the 1976 Olympic Games, Olympic Stadium was not completed on time due to a strike by construction workers. The (556-foot-high) leaning tower used to retract the roof stood half finished until 1987 when the roof was finally completed. It took another 2 years before the roof, made from 60,696 square feet of Kevlar weighing 50 tons, became retractable.
The Stadium was remodeled in 1991, with 12,000 seats being removed for Expos games. In September of that year, one of the stadium’s 55-ton concrete beams fell, forcing the Expos to play a handful of home games on the road. Problems with opening and closing the roof led to its permanent closure in 1992. The roof was removed in May of 1998, turning the park into an outdoor stadium for the season. In the spring of 1998, the orange Kevlar roof was removed and a $26 million opaque blue roof replaced it later in the year. The new roof does not open. The stadium�s total cost has exceeded $1 billion.
The Expos played some of their home games during the 2003 and 2004 seasons at Hiram Bithorn Stadium in San Juan, Puerto Rico. The team announced they were moving to Washington, DC on September 29, 2004. A move had been in the works since the team was bought by the other 29 Major League Baseball team owners in 2002.