Image: PfaffensprungSpiralTunnel DoubleLoopCurvedAlignmentTunnels atWassen onNorthernRampToGotthardTunnel

Description: Outline of the Pfaffensprung spiral tunnel and the double loop at Wassen on the northern ramp to the Gotthard tunnel.
Title: PfaffensprungSpiralTunnel DoubleLoopCurvedAlignmentTunnels atWassen onNorthernRampToGotthardTunnel
Credit: Gotthardbahn in: Röll, V. Freiherr von: Enzyklopädie des Eisenbahnwesens, Band 5. Berlin, Wien 1914, S. 354-361. digitized version on www.zeno.org/Roell-1912
Author: Dietler, Hermann (1839-10-01 - 1924-01-24); Röll, Victor Freiherr von (1852-05-22 - 1922-10-12)
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