Merrimack River

Streamflow Hydrology Weather

Merrimack River Levels

May 28 2024

19,855 ACRE-FT

Discharge Volume Today
+490.0 cfs (+5.15%) since yesterday
59.11% of normal Low

Total streamflow across the Merrimack River was last observed at 10,010 cfs, and is expected to yield approximately 19,855 acre-ft of water today; about 59% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 16,936 cfs, with recent peaks last observed on 2023-12-20 when daily discharge volume was observed at 88,890 cfs.

Maximum discharge along the river is currently at the Merrimack River Bl Concord River At Lowell reporting a streamflow rate of 5,250 cfs. This is also the highest stage along the Merrimack River, with a gauge stage of 43.28 ft at this location. This river is monitored from 3 different streamgauging stations along the Merrimack River, the highest being situated at an altitude of 269 ft, the Merrimack River At Franklin Junction.

Last Updated 2024-05-28
Streamflow 10,010.0 cfs
Percent of Normal 59.11%
Maximum 88,890.0 cfs

About the merrimack river

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.

Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Merrimack River At Franklin Junction
USGS 01081500
2000 cfs 5.34 ft 36.99
Merrimack R Nr Goffs Falls
USGS 01092000
2760 cfs 4.06 ft -13.21
Merrimack River Bl Concord River At Lowell
USGS 01100000
5250 cfs 43.28 ft 7.58

Peak Annual Discharge

Merrimack River Maximum Total Discharge

Seasonal Comparison

Merrimack River Year Over Year Discharge

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