The Pontiac Silverdome was a stadium in Pontiac, Michigan. It opened in 1975 and sat on 199 acres of land. When the stadium opened, it featured a fiberglass fabric roof held up by air pressure, the first use of the architectural technique in a major athletic facility. With a seating capacity of 82,600+, it was the largest stadium in the National Football Leagu…The Pontiac Silverdome was a stadium in Pontiac, Michigan. It opened in 1975 and sat on 199 acres of land. When the stadium opened, it featured a fiberglass fabric roof held up by air pressure, the first use of the architectural technique in a major athletic facility. With a seating capacity of 82,600+, it was the largest stadium in the National Football League until FedExField in Landover, Maryland, a suburb of Washington, D.C. expanded its capacity to over 85,000 in 2000.
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