Great way to create a dead zone off your beaches.

The river I grew up on was messed with by a bunch of 'geniuses' from the ACOE and State of MD.
The estuarine ecosystem was killed by an attempt to remove aquatic vegetation to
avoid fouling pleasure craft props.
What was then, 60 years ago, a thriving fishery full of fish, crabs, oysters, and clams has yet to recover, and likely never will, as attempts to re-establish the aquatic vegetation have failed, decade after decade. Whatever those idiots sprayed on the river at night is still lingering in the sediment (brackish water tidal estuary), and the replanted aquatic grasses start to grow and die.
You can still catch a few crabs there, and even tong a few oysters. The clams are gone (extinct, wiped out by Cow-nosed Ray which could only get at them with the grasses removed), and most of the species of fish I fished for as a child are just no longer present, replaced by 'river catfish' released into the James River, which supposedly did not go into the ocean, but somehow made it up from the James river to Cape Charles (via the Atlantic) and up into the Potomac and Chesapeake Bay.
Just quit screwing with Nature.
So if those idiots in Massachusetts want to screw with their water offshore, keep in mind the effects of such 'experiments' can be profound, negative, and lasting.