Merrimack River

Streamflow Hydrology Weather


Merrimack River Levels

October 9 2024

6,337 ACRE-FT

Discharge Volume Today
+246.0 cfs (+8.34%) since yesterday
42.04% of normal Very Low

Total streamflow across the Merrimack River was last observed at 3,195 cfs, and is expected to yield approximately 6,337 acre-ft of water today; about 42% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 7,599 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 1,440 cfs. This is also the highest stage along the Merrimack River, with a gauge stage of 41.86 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 2024-10-09
Streamflow 3,195.0 cfs
Percent of Normal 42.04%
Maximum 88,890.0 cfs
2023-12-20

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
745 cfs 4 ft 2.76
Merrimack R Nr Goffs Falls
USGS 01092000
1010 cfs 3.01 ft 6.99
Merrimack River Bl Concord River At Lowell
USGS 01100000
1440 cfs 41.86 ft 12.5

Peak Annual Discharge

Merrimack River Maximum Total Discharge

Seasonal Comparison

Merrimack River Year Over Year Discharge


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