The new Perthshire centre will house a 60-seat cafe, a retail area and a multi-space area for educational use once completed.
In addition, a main exhibition space will be created showcasing accounts from engineers who worked to build the dam over 70 years ago.
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SSE Head of Heritage, Gillian O'Reilly, said: "The new visitor centre is very important to us because SSE's history is Scotland's history.
"Hydro electricity improved the lives of ordinary people living in the north of Scotland and we are really interested to hear from the people who experienced it first hand."
Ms O'Reilly added anyone who worked on various Scottish hydro schemes during the 1940s, 60s or 60s, or who lived near a construction project/worker's camp, should get in contact with SSE.
The new facility is on schedule to be opened this autumn.
(LM/MH)
