Hydrologic data of the lower Merrimack River basin, Massachusetts, from Concord River, Lowell, to Plum Island, Newburyport

The lower Merrimack River basin study area drains approximately 180 square miles along the New Hampshire border in northeastern Massachusetts. This area includes parts of the Merrimack River basin within Massachusetts east of the Beaver Brook and Concord River basins, except for the Shawsheen River basin. Even though the Blackwater River basin within Massachusetts isn't part of the lower Merrimack River basin, it has been included in this report. Principal tributaries to the Merrimack River, which discharges to the Atlantic Ocean at Newburyport, Massachusetts, are: Bare Meadow, Bartlett, Cobbler Creek, Fish, Richardson, and Trull Brooks, Artichoke, East Meadow, Indian, Little, Powwow, and Spicket Rivers, and Johnson Creek.