I remember this almost being the last bonus I collected in 2010. I got all the way to Watford City where one GPS was a siren song pulling me in with "big points, go west to the tunnel" and the other GPS barking "head east or you will DNF". I think it was the biggest non-Rest bonus of that rally and it was only a 1/2 hour away! It was the first time I bailed on my route plan and my stomach was in knots. Got back to Leo's with an hour to spare, so whatever time it took to walk/run through the tunnel is what I would have been late.
Couldn't get that missed bonus out of my head until a wandering motorcycle vacation took me back there in 2015. An amazing feat of engineering and a memorable location and bonus. For me, the bridge was as impressive as the tunnel. Plus I got to enjoy it all while not in rally-mode. Hopefully they will get the funds somehow.