the original cement dam at Tunhovdfjorden i Norway completed in 1920 had mechanical gear works to regulate the sluice gates. the dam was rebuilt in the 1960s as a rockfill dam around the original structure with a paved road across it. the original gear works were removed and placed on display at the northeast end of the dam. earlier this summer we stopped there where i took these shots with my S22 phone. the photos were originally in color but i edited the ones posted here to black and white.
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From @eolianpariah2