Deep Navigation Colliery now home to many local rugby and football teams. Deep Navigation Colliery Deep Navigation Colliery was a coal mine in South Wales, that operated from 1872 until 1991. Located next to the co-developed village of Treharris in the borough of Merthyr Tydfil, on development it was the deepest coalmine in South Wales Coalfield by some . Producing the highest quality steam coal, it powered both the Cunard passenger steamers RMS "Mauretania" and RMS "Lusitania" in their successful attempts at the Blue Riband prize for the most rapid Atlantic Ocean passage. The mine is also thought to have been one of
Titans of the Deep creatures seen and filmed at that depth for the first time. Titans of the Deep Titans of the Deep is a 1938 film inspired by the early 1930s deep sea dives made by William Beebe and Otis Barton. Beebe and Barton were the first to set ocean depth records in a device invented by Barton. The film was written by Les Adams. It was somewhat intended as a documentary but was often sold and advertised as an exploitation/horror picture. Prominent scientists Dr. William Beebe and Otis Barton, using the Bathysphere invented by Barton, descend several thousand feet to the ocean