I was only quoting figures which had been put forward on this thread and stating that they are not all likely to be for the same thing. Given that it could have been for just a single line over the section which is closed (about 25 miles, or about £4m per mile) and most of the heavy earthworks have already been done, I can see how that would seam reaistic to those suggesting it.
The news story which was probably being used can be found here:
http://www.plymouthherald.co.uk/Reo...e-Okehampton/story-18605657-detail/story.html
Likewise a few people have suggested £250 million
http://www.kalyr.com/weblog/railways/transport/storm-damage-at-dawlish/
http://www.bbc.co.uk/news/uk-26068375
Any idea how much the DAL will cost? How can anyone say that the DAL is better if we do not know the cost? If the DAL costs £100 million per mile (bearing in mind Crossrail is costing £188 million per mile and is mostly new tunnels) and may only save upto 10 minutes of the time for the express services (and probably less than that when it comes down to it), is that good value for money?
If the DAL where to cost £1bn (which 10 miles at £100m per mile would be the cost) it could be possible, by reopening a faster new route through Okehampton, could cut 20 minutes off the journey time (based on an average line speed of 90mph for the express services). If it included adding a chord avoiding Exeter (which others have suggested) one or two services a day could cut a further 10 minutes off the journey time, it could result in the fastest services from London to Plymouth being cut by 30 minutes to 2.5 hours and over half of all services being reduced to 3 hours or less (including all services which call at 3 or 4 stations between Exeter and Reading).
Before anyone says what about Exeter, it could then be served by new services from Torbay to London (say two to four services per day) to compensate for the one or two services a day which would then bypass it, resulting in more availabe seats from Exeter to London in addition to a better service for Torbay.
Nowhere did I say that Torbay would be cut off from the rail network. The point I was making was that the majority of express services do not directly serve Torbay, so in the greater scheme of things what does it matter that they go another route. I then went on to explain that by doing so Torbay could see an increase in the number of direct services to London.
Of course there maybe other new services which are not currently possible which would further improve things for Torbay further. Suggestions could include new services to (or at least through) Bristol.
Most people would rather see an improvement to their rail service every day, with (for instance) more trains going direct to London (as well as directly to Plymouth), but have to put up with a few days a year of having to get a bus (which will be less problematic as there will be less people wanting to use said buses as everyone to Plymouth or beyond could go via Okehampton and is no worse in terms of numbers of days as the do nothing option).
Whilst the DAL would bring benefits to Torbay in time there would also likely be a fair amount of weekend closures whilst the DAL was built. Meaning maybe the equivilant of up to 10 years worth of storm closures in one year (assuming 10 farily quite years) to build a line which means that they don't need to worry about storm closures once the line is open. Although people like to think that they take the long view, it is likely that everytime the line was closed to build the DAL those pushing the for route through Okehampton would suggest that it should have been built instead.