Graphs, notes, Conway & C.Bay Joint Water Supply Board Act 1916, new 15" main Plas Dulyn to Pont Wgan.
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 
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 
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.