The Denver Post » Financial terms released Tuesday for the controversial Interstate 70 expansion through northeast Denver show that a partnership agreement will cost the Colorado Department of Transportation an estimated $2.2 billion over the course of more than 30 years.  Kiewit Meridiam was selected in August from among four consortiums that bid to finance, design and build the $1.2 billion construction project, and then operate and maintain the widened 10-mile stretch for three decades.