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Report - winterhill transmission mast - march 2012

Discussion in 'Other Sites' started by killer1479, Mar 18, 2012.

  1. killer1479

    killer1479 28DL Full Member
    28DL Full Member

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    i know this doesn't qualify as an urban explore, but i thought id give it a try and upload it =)


    Winter Hill is a hill on the border of the boroughs of Chorley, Blackburn with Darwen and Bolton, in North West England. It is located on Rivington Moor, Chorley and is 456 metres (1,496 ft) high. Part of the West Pennine Moors, it is a popular walking area, and has been the setting for mining activity, aeroplane disasters and murders.
    Its prominent position made it the ideal site for the Winter Hill TV Mast, transmitting to a large part of North West England. There are also a number of other telecommunication masts and towers around the summit and side of the hill for mobile phones, Professional Mobile Radio users and emergency services. Lancashire Constabulary was the first to use the site for one of their base stations in 1950; they had to build the road and it is said to have been built by policemen.

    The Winter Hill transmitting station is a broadcasting and telecommunications site situated on Winter Hill, at the southern boundary of the Borough of Chorley, and above Bolton in Greater Manchester, England. It is owned and operated by Arqiva.

    HEIGHT
    The original mast at Winter Hill was a 450 ft high tower which came into service on 3 May 1956, and carried the programmes of Granada ITV (weekdays) and ABC TV (weekends). In 1966 services were transferred to a new higher mast erected adjacent to the original tower.The main mast structure is 309.48 metres (1,015.4 ft) tall and has a diameter of 2.75 metres (9.0 ft). During the period of parallel digital and analogue transmissions, the DTT antenna attached to the top of the mast brought the overall height to 315.4 metres (1,035 ft),[1] however as part of the Digital Switchover plans, this antenna has now been removed, reducing its overall height to 309.48 metres (1,015.4 ft).[1] It is one of the tallest structures in the United Kingdom, the tallest being the mast at Belmont with a height of 351.5 metres (1,153 ft), however at 778.1 metres (2,553 ft) above sea level, Winter Hill has the highest television transmitting antenna in the UK.

    CONSTRUCTION
    Unlike most masts, which are of a lattice design, Winter Hill mast is of a tubular construction. Five other masts in England share this design (Belmont, Bilsdale, Mendip, Waltham and the original ill-fated structure at Emley Moor). Support wires, to hold the mast vertical, are pitched at 120° when viewed from above. These are connected at 5 heights, giving 15 supports in total. In recent years, these wires have been strengthened, and 152 metric tons (150 tons) of dampening chains have been fitted by Arqiva (then NTL Broadcast) to reduce the oscillations caused by high winds that were a factor in the collapse of Emley Moor's original structure in 1969.

    COVERAGE
    The station's coverage includes approximately 6.3 million people. Although not the 'correct' television region, it is the preferred region for some in North Wales, mainly because it carries Channel 4 (as opposed to S4C), Channel 5 and a much more powerful digital terrestrial output than the Welsh transmitters. The region's ITV franchisees, Granada Television (weekdays only until 1968) and ABC Television (Associated British Corporation) weekends (launched in 1956), were on air much earlier than North Wales' franchisee, WWN (Teledu Cymru) which launched in 1962 (subsequently HTV Wales) giving viewers more choice than they would with the Welsh transmissions. ABC Television lost its franchise in 1968, when Granada Television commenced broadcasting seven days a week. Since the digital switchover, the Welsh transmitters are broadcasting DTT at a much higher power and Channel 4 & Channel 5 are now included in the line-up. However, because of terrain and rough landscapes of North Wales, many will find it easier to stay with Winter Hill (as small local relays will only broadcast a limited range of the digital channels).
    In July 2007 it was confirmed by Ofcom that Winter Hill would be remaining a C/D group transmitter after DSO (digital switchover). One of the Winter Hill Multiplexes (Arqiva B or MUX6), broadcasting channels including Film4 & ITV4, was on reduced power (12.5 kW) until Sutton Coldfield went fully digital in September 2011. This compares with the other Winter Hill digital multiplexes which have broadcast with 100 kW since 2 December 2009. This significantly affected the Arqiva B multiplex coverage area until the Sutton Coldfield final switchover.
    Apart from North Wales, the coverage area is what is expected, covering a large area of the north-west. More Relay Transmitters appear towards the east in Greater Manchester.

    PLANE CRASH
    On 27 February 1958, a Silver City Bristol 170 Freighter (G-AICS) travelling from the Isle of Man to Manchester crashed into Winter Hill (also known as Rivington Moor) several hundred yards away from the mast. 35 people died and 7 were injured. The weather that night was so severe that none of the engineers working in the transmission centre were aware of the crash. Several feet of snow hampered rescue efforts, and a snow cat vehicle had to be diverted from the A6 to cut a path for emergency vehicles.


    apologies for the long introduction, but i hope some find it helpful who didn't know much about it or was curious about it...

    on with the pictures


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