See http://en.wikipedia.org/wiki/Dawlish_railway_station .
I cannot help but think this delightful line along the coast is going to have to go. It has been there for over 150 years and was once on Brunel's 7 foot gauge. At one time there was an inland route from Newton Abbot to Exeter but this was lifted about 50 years ago and now part of the A38 uses the route. The only other alternative would be to re-lay the Tavistock to Plymouth line. This would be expensive and would leave the Dawlish area with questionable rail services. I don't have the answers, but think the time is drawing close when some serious decisions have to be made. One positive, it would create jobs whilst the line was being created.