The series comprises mainly typed minutes of meetings of the executive committee, discussing issues such as afforestation, the designation of special areas of Wales as national parks, national park administration, road and bridge schemes, preservation of historic buildings, planning regulations, housing and industrial developments, coastal development, siting of radio and television stations, construction of power stations and electricity lines, reservoir and hydro-electric schemes, nuclear energy, pollution, protection of wildlife and natural habitats. Recurrent high profile issues include Trawsfynydd nuclear power station, 1954-1965, 1975, Llyn Brianne, 1966-1969, 1973-1976, the Rio Tinto Zinc Corporation, 1966-1971, pumped water storage schemes at Dinorwic (Dinorwig), 1971-1973, 1976-1981, and the Severn Barrage, 1981-1989. The minutes include circulars concerning CPRW constitution and policy, annual events, conferences and representation on other bodies such as the National Trust and Nature Conservancy Council.

Papers, 1939-1975, relating to 'The Road in Wales', T. I. Ellis's translation into English of R. T. Jenkins, Y Ffordd yng Nghymru (Wrexham, 1933). The translation is unpublished.

The file consists of the Parliamentary Debates of sittings of the Welsh Grand Committee and other official publications, discussing education, rural development, roads and communications, agriculture, proposals for local government re-organisation, the Welsh economy and the Welsh Council.