Both topography and geography change over time.  Geologically, Wales hasn’t changed much in 2000 years, but the topography has, from mining, from the building of villages and cities, and from the wholesale cutting–and then replanting–of forests.  As evidenced by the loss of the location of many of the Roman roads, transportation routes change over time.  What used to be on a major pathway across the country is now in a desolate, hard-to-reach area. As one example, in Powys, in the 19th century, the leader of Birmingham City Council set about finding a clean water supply for the City.  He identified the Elan and Claerwen Valleys as having the best potential for water storage with ample water (72 inches a year), narrow downstream valleys, impermeable bedrock, and a higher altitude eliminating the need for pumps. “An Act of Parliament was passed Read more…