Tale of a Tunnel Geoff Ballinger, BBC Wales

1. TALE OF A TUNNEL
GEOFF BALLINGER

6. First Severn Tunnel Act 1810

7. Three Pence an Ass…

44. TUNNEL TOTALS
Length:
4 miles 624 yards
14 years to build
76 million bricks
37,000 tons cement
23 million gallons of
water pumped daily
50 feet min between top
of tunnel and bottom
of river
20 minutes until water
reaches track level (in
case of failure)

45. Where the Great Spring goes…