§ 64. Mr. Harold Daviesasked the Minister of Power what information he has sought, for the purposes of the inquiry he has ordered, into the cost of laying a cable underground in the area near Bagnall, Staffordshire, to avoid 205W having the pylons on the skyline in the village of Bagnall and regarding the difference this would make in the cost of the project in this small section of the Rugeley Whitfield Electricity Supply Scheme.
§ Mr. ErrollNone; the Central Electricity Generating Board must provide any necessary information at the inquiry.
COMPARATIVE COSTS OF OVERHEAD AND UNDERGROUND LINES — Single Circuit (a) Double Circuit 11,000 volt 33,000 volt Light Duty 132,000 volt Heavy Duty 132,000 volt Light Duty 275,000 volt Heavy Duty 275,000 volt Heavy Duty 400,000 volt Very Heavy Duty 400,000 volt £ £ £ £ £ £ £ £ One mile of overhead line 750 to 2,500 2,000 to 4,000 10,500 15,000 17,000 27,000 29,000 54,000 One mile of Cable installation of equivalent capacity 3,000 to 7,500 12,000 to 21,000 80,000(b) 118,000(b) 243,000(b) 461,000(b) 613,000(b) 1,226,000(b) Ratio 3–4 5–6 8 8 14 17 21 23 (a) Costs vary widely according to the size of conductors, the terrain to be crossed and other factors, but will usually lie within the range quoted. (b) Based on both circuits fully loaded and average conditions of laying in a rural area, including terminations and permanent reinstutement but excluding reactive compensation. 275 kV and 400 kV cables are those within present type approvals having conductor cross sections not exceeding 1.5 sq. in.