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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Colenso Power Station was a coal-fired power station, located in Colenso on the banks of the Tugela River. It was built in the 1920's by the South African Railways to supply electricity for the railways, but was subsequently sold to the Electricity Supply Commission (Eskom). Steep gradients on the Natal section of South African Railways, particularly in the Natal Midlands meant that electricfication could well be beneficial, particularly if regenerative braking was employed. In 1921 the estimated cost of the electrification project, inclusive of the Power Station was GB 2,033,000. Building work started in 1921 and the power station was opened in 1926 with a capacity of 60 MW. Initially it only provided power for the 274 km section of the Glencoe - Pietermaritzburg part of the Durban-Johannesburg railway - the area that not only had the greatest gradients, but also the area that was closest to the coalfields of the Glencoe region. Power generated at Colenso was distributed at 88,000 Volt to twelve substation where it was converted to 6,600 Volt and then to 3,000 Volt DC current by Synchronous motor generators for use by the railways.

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