Because this de-silting was not done, their storage capacity dwindled steadily through years and is now only a mere 2 or 3 percent of their originalcapacity at the time of their commissioning.
"Extending the 7 line to New Jersey could address many of the region's transportation capacity issues at a fraction of the original tunnel's cost, but the idea is still in its earliest stages, " said Andrew Brent, a spokesman for Deputy Mayor Robert Steel.
Spurs chairman Daniel Levy had defended the club's ambition to move to Stratford by stating very clearly that staying in Tottenham - and following an original plan to develop White Hart Lane which would increase the capacity to 58, 000 - is not financially viable.