Originally Posted by josh_cat_eyes
Yeah they did say that, but my proposal was to put a tunnel at both ends of the 111 highway and get rid of the bridges. It would be a MASSIVE project, but I think it would help downtown. Especially the part about having the new stadium and metro centre on the site of halport next to the woodside tunnel connecting through pleasant point park to a north west arm crossing. Perhaps you could even name one of the tunnels after Vince Coleman or Charles Tupper? Just a thought.
I would like to see the tunnels built, but the cost would be overwhelming. I think just the cost of the two tunnels would be in the $2.5 - 3 billion dollar vicinity. I am basing this on the estimate for the southern tunnel which was $1.6 billion. The northern tunnel would likely be cheaper but if the southern tunnel were $1.6 billion then the northern tunnel would likely be at least $1 billion.
I remember reading that when the MacDonald bridge is re-decked in 2014, the clearance under the bridge will be higher (I can't find a reference, but I think it was in this story which can only be accessed by paying a fee to the Chronicle Herald - Lions Gate makeover a preview of what's ahead for Macdonald
- The Chronicle-Herald - Metropolitan - 11-24-2010). This project will replace the entire bridge structure except for the bridge towers and main suspension cables and is estimated to cost about $150 million. I believe that they are planning to do it at night and on the weekends by replacing one section at a time - this will be a major engineering feat (i.e. replacing most of the bridge without shutting it down for an extended period of time).
It is interesting to note the the two Halifax harbour bridges are running at a revenue surplus, it would be difficult to achieve that with a costly southern crossing, whether it be a tunnel or bridge.