This image shows a closer view of the Bagnell Dam, featuring the power generation section in the foreground, and the spillways in the background. In addition, like many of these larger dams, it has a highway built across it to allow access to both sides of the lake.
Blair Cedar and Novelty Works, Camdenton, Mo.
The description states:
BAGNELL DAM, LAKE OF THE OZARKS, MO.
This engineering masterpiece forming the beautiful Lake extending 150 miles with 1300 miles of shoreline.
–Additional views of this dam are available here. This card likely dates to the 1950s.