Early in 1835,
Anthony Hill, owner of the
Plymouth Ironworks at Merthyr, asked the engineer
Isambard Kingdom Brunel, a personal friend, to estimate the cost of building a railway from Merthyr to
Bute Docks in Cardiff. Brunel's estimate was £190,649. However, by the following year Brunel had revised his estimate upwards, to £286,031, to accommodate improved gradients, mineral branches and shipping
staithes. In October 1835 a meeting of 'the Proprietors of Iron Works, Collieries, and others interested in the Minfral and other Property of the Vallies of the Taff, Rhondda, Cynon, Bargoed, and other adjacent places, and the Trade of the Town of Merthyr Tydvil and Port of Cardiff' was held at the Castle Inn in Merthyr Tydfil, chaired by
John Josiah Guest, the
MP for Merthyr. The meeting resolved to form "The Taff Vale Railway Company" and a provisional committee was appointed, consisting of J. J. Guest, W. Thompson, T. R. Guest, Richard Hill, Anthony Hill, William Forman,
Walter Coffin, E. I. Hutchins, Edward Morgan, Robert Beaumont,
Thomas Powell, W. Thomas, D. W. James, David Evans,
George Insole, W. Jones, Henry Charles, and
David Davis.
Act of Parliament The promoters agreed to go forward with a parliamentary bill in the 1836 session. The Glamorganshire Canal Company opposed the bill, but it was passed and obtained
royal assent on 21 June 1836 as the '''''' (
6 & 7 Will. 4. c. lxxxii). The Taff Vale Railway Company was incorporated with capital of £300,000. The directors were Josiah Guest (who became its first chairman), Walter Coffin, Edward Lee, Thomas Guest, Thomas Guppy, Thomas Powell, Christopher James, Thomas Carlisle, Henry Rudhall, William Wait, William Watson, and Peter Maze. However, at the company's first general meeting on 16 September 1836 the following were appointed as directors: J. J. Guest, Walter Coffin, T. R. Guest, Thomas Powell, T. Carlisle, E. H. Lee, Henry Rudhall, C. E. Bernard, Chris. James, W. K. Wait,
Elijah Waring, and R. H. Webb. The act authorised a railway from
Merthyr Tydfil to
Cardiff, to be known as the Taff Vale Railway, with several branches: to connect with the tramroad to
Dowlais and other ironworks nearby; to collieries at
Llancaiach; to the tramroad serving
Dinas collieries (in the
Rhondda); and to
Cogan Pill. Company profits were limited to 7%; this could be augmented to 9% if the tolls for use of the line were substantially reduced. Independent carriers as well as the company itself were potentially able to use the line. The act also limited the speed of the trains on the line to , with stiff penalties for any speeding. (These two clauses were repealed by the '''''' (
3 & 4 Vict. c. cx)) Locomotive operation and the carriage of passengers were permitted by the Taff Vale Railway Act 1836.
Construction and opening of the first main line The construction of the line posed no great engineering challenges as its course followed the valley of the River Taff. The line was in length. At
Quakers Yard there was a sudden steep change of ground level and Brunel used stationary winding engines; the inclined section was in length with gradients of 1 in 19 and 1 in 22. Locomotives did not ascend the incline. There was a 1 in 13 gradient on the
Pwllyrhebog branch, near
Tonypandy; it too was rope-worked with special locomotives. Inevitably there were some stiff gradients elsewhere. There were two stone viaducts on the route: the first, at
Pontypridd, crosses the
River Rhondda, and the second bridges the
Taff valley between Goetre-coed and Quakers Yard. A ceremonial opening of the line between Cardiff and Navigation House,
Abercynon, took place on 8 October 1840,
Early branches A mineral branch from Pontypridd to
Dinas Rhondda opened in June 1841. The
Llancaiach Branch was authorised in the original Taff Vale Railway Act 1836 (
6 & 7 Will. 4. c. lxxxii). It opened on 25 November 1841 for mineral traffic only, from Stormstown south of Abercynon to three adjacent collieries at Llancaiach. There was a self-acting rope-worked incline long on a 1 in 8 gradient. Use of the line was less than expected, traders finding that the charges on the canal were substantially lower. The TVR hesitated to build the authorised branch to the tramroad to
Dowlais and the clause in the act enabled the Dowlais Iron Company to take over the construction and the branch, which they did. ==First years of operation==