The subfonds PWR/9 contains the following series:
- PWR/9/1 Institution of Civil Engineers, 1955-1995
- PWR/9/2 Institution of Water Engineers, 1961
- PWR/9/3 British Geotechnical Society, 1966-1991
- PWR/9/4 British Section, International Commission on Large Dams (ICOLD), 1982-1987
- PWR/9/5 International Society for Soil Mechanics and Foundation Engineering, 1982
- PWR/9/6 Science and Engineering Research Council, 1982
- PWR/9/7 Fellowship of Engineering, 1983
- PWR/9/8 University External Examiners' Boards, 1983-1986
- PWR/9/9 British Academy of Experts, 1988