From an early date, the Mansel‑Talbot family were deeply involved in industrial development, leasing land for ironworks, copper works and the extraction of coal, iron and limestone. As the 19th century progressed, industrial income soared through royalties, wayleaves and mineral rents. Land agents oversaw this growing enterprise and negotiating leases, collecting payments and managing the constant legal and administrative demands. Experts such as Edward Daniel, the estate’s inspector of mines, provided specialist guidance as new collieries and works were opened across the estate. Industrial expansion wasn’t without conflict. In 1833, when John Vigurs began building a copper works at Cwmavon, C.R.M. Talbot objected to the fumes and threatened to halt the works if damage occurred. Disputes continued over water extraction, stone removal and pollution. Meanwhile, major companies such as Vivian & Sons, the Oakwood Coal & Iron Company and the Bryndu Coal Company became key tenants, with coal output reaching hundreds of thousands of tons a year. By 1903, mineral income for Miss Talbot exceeded £39,000 annually, a reflection of the estate’s industrial importance.
To support the booming industries of the Afan valley, Talbot and local entrepreneurs founded a company in 1834 to build a new dock at Taibach. The project, later named Port Talbot in honour of the family, involved widening the River Afan, cutting a new channel and constructing what was then the largest lock in the Bristol Channel. Despite engineering setbacks, the dock opened in stages from 1837 to 1841. By the late 19th century, the original dock could no longer handle modern shipping. Emily Charlotte Talbot backed a major redevelopment, leading to the creation of the Port Talbot Railway and Dock Company in 1894. A new deep‑water dock, breakwater and enclosed basin were completed in 1898, transforming Port Talbot into a major industrial port. Coal exports rose from 16,000 tons in 1890 to more than two million tons by 1913, and the port gained independent status in 1904.
Christopher Rice Mansel Talbot was a pioneer of railway development in South Wales. As chairman and major shareholder of the South Wales Railway, he personally financed the completion of the line when funds ran short in 1849. In June 1850 he travelled the newly opened route with Isambard Kingdom Brunel, greeted by cheering crowds at every station. The railway transformed travel across Wales, and Talbot later became a director of the Great Western Railway, investing heavily in its expansion. Industrialisation also brought environmental problems. Copper fumes from the Taibach and Cwmavon works damaged crops, livestock and soil across the estate. Scientific tests in the 1890s confirmed contamination, leading to an injunction restricting the smelting of impure ores. Public protests followed, but the Cwmavon works eventually closed in 1906. Not all industrial ventures succeeded. Financial difficulties forced several lessees to surrender their leases, including the Bryndu Coal and Coke Company. Despite heavy losses, Emily Charlotte Talbot kept the colliery running to protect local jobs, but by 1912 operations ceased, leaving the estate with significant financial losses.