View of the upstream face of the concrete dam wall under construction showing the chutes provided to deliver concrete from the mixing station, situated high up and on the top of the krantz, to cocopans running on a tramway on the wall PWSA July 1948 Vol IX No 56:16 Submitted by Roger Fisher (2026) Photographer: Scanned image. University of Pretoria Library Services

View of concrete arched wall and base of valve tower is on the left flank under construction PWSA July 1948 Vol IX No 56:16 Submitted by Roger Fisher (2026) Photographer: Scanned image. University of Pretoria Library Services

Downstream view of completed concrete arch dam wall PWSA July 1948 Vol IX No 56:14 Submitted by Roger Fisher (2026) Photographer: Scanned image. University of Pretoria Library Services

View of dam overflowing shortly after completion PWSA July 1948 Vol IX No 56:15 Submitted by Roger Fisher (2026) Photographer: Scanned image. University of Pretoria Library Services

View from the foot of left flank with valve tower showing one of the valves being opened and, on the extreme left, one of the nappe-interruptors, which permit air to enter behind the sheet of water when the dam overspills PWSA July 1948 Vol IX No 56:14 Submitted by Roger Fisher (2026) Photographer: Scanned image. University of Pretoria Library Services

The gantry for operating the emergency gates can be seen on the valve tower at the left. The two nappe-interruptors on the curved crest divide the overspilling sheet of water to enable air to enter behind and thus relieve the suction PWSA July 1948 Vol IX No 56:17 Submitted by Roger Fisher (2026) Photographer: Scanned image. University of Pretoria Library Services