Facts and Figures
- Length of tunnel I: 19,803 m (12.305 mi)
- Length of tunnel II: 19,823 m (12.317 mi)
- Elevation at north portal, Brig: 685.80 m (2,250.0 ft)
- Elevation at crest of the tunnel: 704.98 m (2,312.9 ft)
- Elevation at south portal, Iselle: 633.48 m (2,078.3 ft)
- Gradient on north side: 0.2%
- Gradient on south side: 0.7% ( 1 in 143)
- Start of construction on north side: 22 November 1898
- Start of construction of south side: 21 December 1898
- Breakthrough: 24 February 1905
- Inauguration: 19 May 1906
- First electrical operation: 1 June 1906
Read more about this topic: Simplon Tunnel
Famous quotes containing the words facts and/or figures:
“Perhaps the facts most astounding and most real are never communicated by man to man.”
—Henry David Thoreau (1817–1862)
“The human heart concerns us more than the poring into microscopes, and is larger than can be measured by the pompous figures of the astronomer.”
—Ralph Waldo Emerson (1803–1882)