 The Montreal Alouettes were the first to undertake this project, adding 5,000 seats to Percival Molson Memorial Stadium in time for the 2010 CFL season.The Edmonton Eskimos and Calgary Stampeders also renovated their respective stadiums and facilities for the 2010 season.In 2011, the BC Lions played under a new, retractable roof in BC Place after spending one and a half seasons at Empire Field.