includes charts and graphs of daily flow, number of branches equivalent to main pipe works of water supply, correspondence, construction programme charts on break pressure tanks, notes on treatment Cowlyd Valley improvement scheme Contract No.2. Water treatment building Contract No.1. trunk main Dec 1973. Llyn Cowlyd Agreement - Extract from Consent dated 4.7.91 from National Power to Welsh Water. Map: new communities in Borough of Aberconwy 1991 [copies]
Envelope of correspondence from Allott & Lomax Consulting Engineers 23 Ashton Lane, Sale, Cheshire re above.