This postcard, published by the Duluth Photo Engraving Company, was mailed 100 years ago today — Aug. 30, 1924. It shows the Great Northern Power Company Dam, now known as the Thomson Dam and operated by Minnesota Power.

The card was mailed to Jennie Wooster of Minneapolis from June Pfaff, who sent it from Superior. The message on the back reads:

Dear Miss Wooster,
I am spending my vacation here. Having a wonderful time. Been on a boat on Lake Superior about 7 times. Will see you later.