Information about Brant Rock, MA
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An anchorage basin is on the east side of the channel off the town wharf.
The town wharf and a marina are on the east bank about 0.4 mile above the jetties. The facilities have approach and alongside depths of 6 feet. Berths, electricity, gasoline, diesel fuel, water, ice, sewage pumpout, launching ramps, a 12.5-ton lift, storage, and hull and engine repairs are available.
Green Harbor is a small village on the west side of the river. A marina and the Green Harbor Yacht Club are on the west bank near the head of the harbor close southward of the causeway. Berthage, electricity, gasoline, water, marine supplies, and a small-craft launching ramp are available at the marina. The service float has 6 feet reported alongside. A 15-ton mobile hoist can haul out vessels for hull, engine, electrical, and electronic repairs, and for open winter storage.
Click the “Map View” button above to see a chart of this harbor.
Brant Rock is a village about 5 miles southward of Fourth Cliff. The village derives its name from Brant Rock, a distinctive bare rocky islet about 300 yards offshore which is joined to the shore by a stone jetty. A square concrete tower in the village is very prominent. For about 1 mile south of Brant Rock to the entrance of Green Harbor River, foul ground extends offshore for nearly 1.5 miles to Farnham Rock, which is covered 14 feet. A lighted bell buoy is just eastward of the rock.
Green Harbor River has its entrance west of Blackmans Point at the southern end of Green Harbor Point. Bartlett Rock, which uncovers 2 feet, and Howland Ledge, covered 7 feet and marked by a buoy, are 0.6 and 1.2 miles eastward of the entrance, respectively. An obstruction reported to be covered 6 feet is about 275 yards south-southeast of Bartlett Rock. In 1987, an obstruction was reported 200 yards south of Bartlett Rock in about 42°04’34.2″N., 70°37’49.0″W. Jetties are on each side of the entrance; the east jetty is marked by a light. A channel, marked by a buoy at the entrance and a buoy inside, leads to a turning basin about 0.6 mile above the seaward ends of the jetties.
In 2010, the controlling depth was 6.5 feet (8 feet at midchannel) to just inside the east jetty, thence 5.8 feet to the turning basin at the head of the project except for shoaling to bare around Blackman’s Point; 6 feet can be carried in the left outside quarter around the shoal. Depths of 5 to 6 feet were available in the anchorage basin and turning basin.
Local fishermen adjust their arrival and departure times so that they are not in the entrance channel 90 minutes on either side of low water. A current flowing out of the entrance channel during the falling tide reportedly sets up a rip just inside the entrance jetties.