October 9, 2020 — Green Harbor in Marshfield is located 14 miles from the tip of Stellwagen Bank’s southwest corner, a trip that take most fishing vessels just a few hours. Provincetown is closer, but a trip over land adds hours.
“That makes Green Harbor ideal for day trippers to go out there, potentially catch a tuna fish, and land it,” Marshfield Harbormaster Mike Dimeo said. “It’s not a big harbor, but it’s the location.”
The geographic location is an advantage for Marshfield, which is home to roughly 100 tuna boats and 50 lobster boats, but maintaining the harbor proves a near constant effort by the town.
Misaligned jetties at the entrance to Green Harbor provide a nearly yearly headache for the town, Dimeo said. The existing design of the rock structures leads to a faster buildup of sediment than in other harbors, which requires frequent dredging.
The entrance is typically 100 feet wide, but sediment can half that and create a dangerously shallow depth at low tide – sometimes preventing fishermen from heading out or coming back in.
Working around the tides, a boat might head out in weather that’s more dangerous than would be advisable or fish more during off hours.