Ron
That cement thing off the beach is part of the old sewer pumping system.
Its actual a vent. The sewerage for Quincy was formerly pumped thru underground pipe to an island off the coast close to my house. Of course, when we were kids, sometime the sewerage plant offshore would back up, so they had these 3 huge vats (pools) out on "Moon Island" to use as a temporary holding tank. Its tied into that unmanned pumping station I posted a pic, that has 6 parking spaces.
The vats were about 400 feet long, 100 foot wide and 75 ft deep. The road out to Moon island is about 1 mile long and then the road takes a 90 º turn. If you kept going straight, it was right into the vat full of you know what.
A Corvette went into the vat about 1968. That is the last one I heard of. Can you imagine swimming around in that $hit for 2 hours before they hauled you out?
They tried to sell the Corvette - no takers - the smell was overpowering. I remember seeing it.
Today the vats are closed and the sewerage pipe is now just a back-up/failsafe system.
But back in my days as a kid, they dumped the raw sewerage right into the bay about 2 or 3 times a month due to problems. Today, they close the beach if the waste count is 100 parts per million. Hell, we used to swim in the bay when the count was less than one tootsie rolls per sq ft.
We always did the breast stroke to get the floaters out of the way.
OK, now that I've ruined your supper ....