page_title: Cowlyd Tramway
section_title: History
hierarchical_section_title: Cowlyd Tramway / History
caption_attribution_description: The pipeline at Llyn Cowlyd where is passed over the old tramway
context_page_description: The Cowlyd Tramway was a 2 ft narrow gauge railway line used to convey men and materials to Llyn Cowlyd Reservoir, near Trefriw in North Wales during the enlargement of the dam, and thereafter for maintenance purposes.
context_section_description: Llyn Cowlyd had been a reservoir since 1908, owned by the Conwy and Colwyn Bay Joint Water Supply Board. By 1915 rights to water extraction were also held by the Aluminium Corporation and the North Wales Power and Traction Co. Ltd., both of Dolgarrog, and a severe drought in this year prompted the decision to increase water reserves by building a much higher dam.
  Construction of the Cowlyd Tramway began in 1916, and reached Llyn Cowlyd the following year. The dam was completed in December 1921, being built entirely from rock quarried from the adjacent mountainside, and was opened the following year in more favourable weather.
  The tramway was essentially a branch line of the former Eigiau Tramway, built originally as a standard gauge tramway to serve Llyn Eigiau, and connected to the works at Dolgarrog by a series of rope-worked inclines which ran down the steep Dolgarrog escarpment.
  The Eigiau Tramway was itself a successor to the narrow gauge Cedryn Quarry Tramway. At the time of the construction of the Cowlyd Tramway the Eigiau Tramway was re-gauged to the same narrow gauge so that the same locomotives could be used on both. After the collapse of the Eigiau dam in 1925, and the closure of that tramway, the inclines were only used by the Cowlyd Tramway.
caption: The pipeline from Llyn Cowlyd still has the 'hump' where it passed over the Tramway.
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