I grew up in the Boston area in the 60s, before the Charles River was dammed to prevent Boston Harbor tides from flushing into the Charles Basin. Driving along

I grew up in the Boston area in the 60s, before the Charles River was dammed to prevent Boston Harbor tides from flushing into the Charles Basin. Driving along Storrow Drive at low tide in summer was a malodorous experience. Then in the 80s, long after the dam was put in, they had enormous air bubblers in the Charles Basin to stir up the stagnant bottom water. Fun to sail through.