 The final cost of the extension was $198.9 million, with the Cumberland station costing approximately $10 million.In the month following the opening of the three new stations 6,000 additional commuters used the northwest service.The Cumberland station became particularly attractive to suburban commuters from Des Plaines and Park Ridge; a study commissioned shortly after the station's opening found that only 12.4% of commuters parking in the Cumberland and Rosemont stations were Chicagoans.