|
|
|
| The
tunnel was originally going to have trams travelling through
'Central Avenue'. |
| Length
of Roadway |
2.13
miles |
| Total
length of Tunnel including approaches and branch tunnels |
2.87
miles |
| Width
of main Tunnel between kerbs |
36
feet |
| Width
of branch Tunnels between kerbs |
19
feet |
| Internal
diameter of main Tunnel |
44
feets |
| External
diameter of main Tunnel |
46ft.
3 ins |
| Weight
of rock, gravel and clay excavated |
1,200,000
tons |
| Weight
of explosives used |
560,000
lbs |
| Weight
of cast-iron used in lining Tunnel |
82,000
tons |
| Weight
of Concrete used |
270,000
tons |
| Total
length of electric cable in Tunnel |
583.5
miles |
| Average
cover of rock over the top of the Tunnel under the River |
20
feet |
| Total
number of bolts in cast-iron lining is approximately |
1
million |
| Total
number of men employed directly on tunnel construction |
1,700 |
|
|
|
|
|
