The Severn Railway Tunnel - Extensive ten chapter history of the construction. Topics include highs and lows, tunnelling methods, and a collapse in the tunnel. Opened in 1886. The Tunnel of Samos - Illustrated scholarly essay which discusses the theories about the methods of construction of this ancient water tunnel built in the sixth century B.C.. By Tom M. Apostol. St. Clair Tunnel Company - Opened in 1891, running under the St. Clair River, which joins Lake Huron to Lake St. Clair. Includes short history, photographs, and references. Tunnelling Against Time - Illustrated essay on the construction history of the Cascade mountains tunnel completed in 1929. Standedge Tunnel - Construction history, restoration details and photo gallery of the longest, highest and deepest canal tunnel in Britain. First opened in 1811. The Hoosac Tunnel - Comprehensive range of commentary, data, history and construction images. Sutro Tunnel - Facsimile of the letter from the Secretary of War, transmitting the report of the commission to examine and report upon the Sutro Tunnel, in Nevada. January 9, 1872. Bridge and Tunnel Centres - Full text of this 1875 book by John B. McMaster. Report of the Superintendent of the Sutro Tunnel Company - Full text of this document providing detailed reports from the heads of department for the year ending 1873. Sutro Tunnel - Facsimile of the 1872 report of the commissioners and evidence taken by the committee on mines and mining of the House of representatives. London Transport History - Tunnelling - Illustrated commentary on tunnelling methods used in the 19th century. How the Swiss Built the Greatest Tunnel in the World - Short contemporary commentary by Francis Fox about the construction of the Simplon tunnel through the Alps completed in 1905.