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Merrimack River @ Concord, Nh
Merrimack River at Concord
 Total Drainage Area: 2,385 sq. miles 
 Drainage Area Controlled by Corps Dams: 1,555 sq. miles (65%) 
 Warning Flow/Stage: ?? cfs / 10.0 feet 
 Flood Flow/Stage: ?? cfs / 13.7 feet 
Date Time
(Eastern)		 Stage
(ft)		 Flow
(cfs)		 CSM
(cfs / sq. mi.)
May-16 12:30 pm 11.19 21,820 9.2
May-16 11:30 am 11.13 21,640 9.1
May-16 10:30 am 11.09 21,520 9.0
May-16 09:30 am 11.03 21,340 9.0
May-16 08:30 am 10.96 21,130 8.9
May-16 07:30 am 10.87 20,860 8.8
May-16 06:30 am 10.78 20,590 8.6
May-16 05:30 am 10.68 20,290 8.5
May-16 04:30 am 10.56 19,930 8.4
May-16 03:30 am 10.45 19,575 8.2
May-16 02:30 am 10.30 19,050 8.0
May-16 01:30 am 10.16 18,560 7.8
May-16 12:30 am 9.99 17,975 7.5
May-15 11:30 pm 9.80 17,500 7.3
May-15 10:30 pm 9.60 17,000 7.1
May-15 09:30 pm 9.40 16,500 6.9
May-15 08:30 pm 9.17 15,925 6.7
May-15 07:30 pm 8.93 15,290 6.4
May-15 06:30 pm 8.66 14,480 6.1
May-15 05:30 pm 8.40 13,750 5.8
May-15 04:30 pm 8.12 13,050 5.5
May-15 03:30 pm 7.84 12,350 5.2
May-15 02:30 pm 7.56 11,650 4.9
May-15 01:30 pm 7.30 11,000 4.6
May-15 12:30 pm 7.02 10,300 4.3
Report Generated May 16, 2026 05:06 pm