The tunnel begins just west of the central business district, at 12th and Rowan streets. It will continue east and southeast for 2.5 miles, ending near The Home of the Innocents on East Main Street.
There will be three construction staging areas located where the three drop shafts are being built to access the tunnel. These are located at:
- 12th and Rowan streets, also site of new Pump Station
- 7th and Washington streets downtown
- Franklin and Buchanan streets in the Butchertown area