which were originally budgeted for $115–120 million, added a new upper deck on the east side, raising capacity from 21,566 seats to 30,000 for soccer, with 26,500 seats in CFL configuration, and is temporarily expandable with additional end zone seating to 40,000 for big events such as the rugby sevens at the 2015 Pan-Am games, NHL outdoor games, Grey Cup, MLS Cup, possible 2028 Summer Olympics or later or a successful 2026 FIFA World Cup by Canada. The plans called for $30 million retractable end zone seating in the south and a retractable terrace in the north end to ensure that fans aren't farther from the playing surface in soccer configuration due to the longer CFL field, and a roof over most permanent seating areas. Leiweke promised that soccer playing surface will remain natural grass. A reinforced hybrid playing surface such as Desso GrassMaster, in which artificial fibres are embedded in the turf to allow for the grass roots to intertwine with them to strengthen the pitch, was originally under consideration, but concerns that this would complicate repairs to the pitch led MLSE to decide against it. A $1 million subsurface heating system and a $1 million artificial lighting system were installed to encourage grass growth, and MLSE secured an exemption to use pesticides on the field. Portions of the CFL end zones are artificial turf. Removable paint is used for lining the field to allow for the football lines to be removed prior to soccer games. As well, the field has two football goalpost configurations so that the same grass isn't relined every game. Under a two-phase construction process, the field was lengthened and the capacity of the stadium increased for $77 million by May 1, 2015, with the roof added by May 1, 2016 for $43 million. Leiweke in the past had said that even without an expansion the stadium needed $30 million in repairs, and that the original agreement called for the city and MLSE to split that bill equally. Instead, MLSE looked for $10 million in public funding from each of the municipal, provincial, and federal governments to top up their $90 million contribution, plus any cost overruns, for the expansion. MLSE argued that the new stadium would result in $8 million in economic benefits, including taxes, accruing to the province annually, and $18 million in taxes on the construction project. The company has agreed to