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I have encountered what are known as "Locking" manholes (or maintenance holes if you prefer).
You have to rotate the lid about 15° (clockwise? counterclockwise? I forget.) to release the "finger-like" protrusion on the underside of the lid from the slot on the ring. If you don't know it's a locking lid you can spend all day trying to get it open.
Posted : February 18, 2023 5:35 pm
