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
O the Deep, Deep Love of Jesus o'er His loved ones, died to call them all His own; How for them He intercedeth, watcheth o'er them from the throne! O the deep, deep love of Jesus, love of every love the best! 'Tis an ocean vast of blessing, 'tis a haven sweet of rest! O the deep, deep love of Jesus, 'tis a heaven of heavens to me; And it lifts me up to glory, for it lifts me up to Thee! O the Deep, Deep Love of Jesus "O the Deep Deep, Love of Jesus" is a well-known Christian hymn, written by the London merchant Samuel