RIVER GAUGE · MERRIMACK RIVER
Merrimack River at Franklin Jct.
Merrimack County, New Hampshire
Water level4.10 ft
Flow785 cfs
Last readingSep 16, 2026, 4:30 PM UTC (last recorded)
Action14 ft18,000 cfs
Minor flood16 ft21,800 cfs
Moderate flood22 ft36,200 cfs
Major flood28 ft54,500 cfs
The past week
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What floods at each level
- 16 ft
Lowland flooding begins.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Mar 18, 1936 | 36.4 ft | 83,000 cfs |
| Nov 4, 1927 | 30.85 ft | 63,000 cfs |
| Sep 21, 1938 | 29.5 ft | 59,200 cfs |
More on Merrimack River
DownstreamMerrimack River at Goffs Falls
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