DescriptionFreggioAndPratoSpiralTunnelsBetweenRodi-FiessoAndFaidoStationsOnSouthernRampToGotthardTunnel.jpg	English: Outline of the Freggio and Prato spiral tunnels between the Rodi-Fiesso and Faido stations on the southern ramp to the Gotthard tunnel. Going down the southern ramp of the Gotthardbahn after the Gotthard Tunnel the line passes the station of Rodi-Fiesso in a 90° left turn, crosses to the left side of the Ticino River (Tessin) valley. There it passes the 270° Freggio Spiral Tunnel in a left turn into the left side of the valley. Leaving the tunnel the line crosses again the Ticino River valley to proceed a kilometer on the right valley side before moving through the 360° Prato Spiral Tunnel in a right turn into the right valley side. Exiting the tunnel the line crosses again to the left valley side bridging smaller streams before passing through the Faido station and continuing the decent down the southern ramp. From Rodi-Fiesso at 945 m to Faido at 758 m the line drops 187 m along 8.2 km of tracks with 26‰ being the sharpest decline in this section. The shortest beeline distance between the stations is approximately 4km. I.e. the average decline was reduced by approximately 50%, reducing the power needed by the locomotives for the climb. The elevation data and inclination data were all taken from the figure Profile of the Gotthardbahn.
Date	1914, book (or prior source predating the publication of volume 5 of Röll's encyclopedia in 1914)
Source	Gotthardbahn in Röll, V. Freiherr von: Enzyklopädie des Eisenbahnwesens, Band 5. Berlin, Wien 1914, p. 356 and 357 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)
Permission (Reusing this file)	Public domainPublic domainfalsefalse This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 80 years or fewer. You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.  Note that a few countries have copyright terms longer than 80 years: Mexico has 100 years and Jamaica has 95 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse

The original German caption of the graph in the cited publication reads "Abb. 290. Linienentwicklung bei Dazio Grande (Ferggio- und Prato-Kehrtunnel)."
No scale or legend was provided with the map other than the travel distance along the Gotthard line from Immensee indicated for each full kilometer by a small circular mark and the specified distance in km. A hight information is also not provided.
Some of the notations on the map are hard to resolve and prone to be misread or misinterpreted. This includes, but is not limited to the two station names and the name of one of the spiral tunnels, which are the more prominent features marked in larger letter type compared to others. Here the correct name is used with a possible misinterpretation shown in brackets and in the case of the two stations their travel distance from Immensee as interpreted from the data provided in the map:

Rodi-Fiesso Station (Rodi-Tiesso) 97.8km
Faido Station (F??ido) 106.0km
Prato Kehrtunnel (Prxte Kehrtunnel)

These distances match the ones currently listed for the stations in the route diagramm of the Gotthardbahn. Tessin is the Ticino River.

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.  Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).

This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse