| Ddisgrifiad / Description | Graphs, notes, Conway & C.Bay Joint Water Supply Board Act 1916, new 15" main Plas Dulyn to Pont Wgan. Plans:
 1) New 500ft break pressure tank
 2) Cowlyd & Dulyn supply-sources and trunk mains - present conditions
 3) C & D supply sources and trunk mains proposed future conditions
 4) C & D supply as above present conditions 21.7.70 [2]
 5) C & D supply as above proposed future conditions Drg No.T/02/70
 6) Shewing Llandudno C/B Conway Penmaenmawr Llanfairfechan Maenan Eglwysbach and surrounding area
 7) Existing mains to be retained-shown. Proposed mains shown
 8) C & D proposed future conditions -23.7.70 and 30..7.70 [2]
 9) Water board lands pipelines in Cowlyd Valley shewing electricity board valve house. Printed -  Grant dated 7.10.1892 to construct dam and abstract water from Lake Cowlyd.
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