Merrimack River

Surface Flows Hydrology Weather

Merrimack River Levels

June 9 2023

14,658 ACRE-FT

Discharge Volume Today
+860.0 cfs (+13.17%) since yesterday
47.18% of normal Very Low

Total streamflow across the Merrimack River was last observed at 7390 cfs, and is expected to yield approximately 14658 acre-ft of water today; about 47% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 15662 cfs, with recent peaks last observed at 82,500 cfs on 2019-04-28.

Maximum discharge along the river is currently at the Merrimack River Bl Concord River At Lowell reporting a streamflow rate of 3,300 cfs. This is also the deepest point on the Merrimack River, with a gage stage of 42.62 ft. This river is monitored from 3 different streamgauging stations along the Merrimack River, the highest being perched at an elevation of 269 ft, the Merrimack River At Franklin Junction.

River Summary: The Merrimack River is a 117-mile long river that runs through New Hampshire and Massachusetts. It was named by the Native Americans and played a significant role in the growth and development of the region. The river has a watershed area of 4,700 square miles and is fed by several tributaries, including the Pemigewasset and Souhegan Rivers. The Merrimack River has been an important source of hydroelectric power, with several reservoirs and dams built along its length. The largest of these is the Franklin Falls Dam, which creates a 2,500-acre reservoir. The Merrimack River offers various recreational opportunities, including boating, fishing, and hiking, while also serving as a vital resource for agriculture and industry.

Last Updated 2023-06-09
Streamflow 7,390.0 cfs
Percent Normal 47.18%
Maximum 82,500.0 cfs

Merrimack River Peak Annual Discharge

Merrimack River maximum total discharge

Merrimack River Seasonal Comparison

Year over year discharge

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