How much does it cost to tunnel per mile?
The CHSRA estimated in the Alternatives Analysis (AA) that the “cut and cover” or “deep tunnel” options could cost 5 – 7 times more than other available alternatives. Some cost analysis has been performed; however, very broad assumptions were made and there is more uncertainty regarding the specific conditions that would exist along the alignment/profile ultimately selected for implementation of tunneling. Previous studies have estimated the cost for tunneling to be in the range of $100 – $200 million per mile. Additional information is contained in the the CHSRA Tunneling Report.
