Moorside Edge transmitting station was originally constructed in 1931 to radiate the BBC's "North Regional" (from May 17 on 626 kHz) and "National" programmes (from July 12 on 995 kHz). It has one of the most powerful mediumwave radio transmitters in Britain at 200 kW erp. Formed of two 158 metres (518 ft) steel lattice towers it is located just above Moorside Edge (grid reference SE070154). Holme Moss is on a bearing of (168.17°, 11.56 km) and Emley Moor is on a bearing of (99.41°, 15.4 km). As with most MW transmitters a good "signal earth" is important and this is assured by the waterlogged nature of the ground on which it is built. The station is now owned and operated by Arqiva.