Overview of the dam and valley, and reservoir almost full. The image is annotated "Drift Reservoir nearing completion 1-2-61"
It is stamped on the reverse "Richards Brothers, Penzance"
View of central section of dam, water and small inflatable boat to the right. A few men working at the top middle section. The image is annotated "View of upstream face showing widened section 4-1-61"
It is stamped on the reverse "Richards Bros,…