CHICAGO (CBS)–The $6 billion Lincoln Yards Project would span 55 acres of old industrial space along the Chicago River in Lincoln Park and Bucktown.

Project developer Sterling Bay scrapped a 20,000-seat soccer stadium and large music venues, but still plans parks, major public transit upgrades and housing and commercial space.

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Opponents say they want a vote on revisions and tax increment financing that would help the project move ahead delayed until the next mayor and city council are in place.

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They say there are too many unanswered questions.

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The city’s Plan Commission unanimously approved the latest plans for Lincoln Yards on Jan. 24, but it still needs City Council approval.