Idea for alternate NEC routings

[PRR 60]

Don't forget if one tube is down for years the other tube will have to be shut every 2 - 4 weekends for major work.

The estimated time to repair each tube is one year of 24/7 work. The defects do not involve elements relating to structural integrity. The issues are with the concrete lining, the bench wall, and track and ballast - important items, but it's not like the tunnel will suddenly fail and water will start gushing into the tubes. The post Sandy inspection found the cast iron tube, the structural heart of the tunnel, is sound.

 

[west point]

Work on a bore has to be staged. If too much concrete is removed without replacement it is possible that tube would try to float ? That could significantly extend work ?

 

[jis]

Work on a bore has to be staged. If too much concrete is removed without replacement it is possible that tube would try to float ? That could significantly extend work ?

I am sure they have taken such issues into consideration in their planning without our amateurish help