Includes (1) photographs of models and corresponding prototype structures highlighting the more important studies done in the Hydraulic Models Laboratory over 28 years. (2) Reflections of professional engineers who participated in the implementation of Gordon R. McKay's ideas in hydraulic engineering, including Jim Turnbull on dams and George Pavlu on models.

Spanner created during first-year practical training project as part of a civil engineering course at The University of Queensland in 1948.