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Hopkinton Dam, Contoocook River
Hopkinton Dam, Contoocook River
 Drainage Area: 426 sq. miles 
 Channel Capacity: 7,000 cfs 
 Storage at Spillway Crest: 6.5 in / 70,100 ac-ft  
 Normal Pool: 380 Feet NGVD(Summer), 382 Feet NGVD(Winter) 
 Gate Settings for October 09, 2026 02:21 pm Gate 1 Gate 2 Gate 3 Gate 4 Gate 5 Gate 6 Gate 7 Gate 8
  0.0 0.0 0.0 0.0 0.0 0.0    
Date Time
(Eastern)		 Pool
(ft)		 Storage
(%)		 Storage
(ac-ft)		 Tailwater
(ft)		 Flow
(cfs)		 Inflow
(cfs)		 Precip
(in)		 Air Temp
(F)
Oct-10 08:15 pm 382.04 0.9 677       0.05  
Oct-10 07:15 pm 382.02 0.9 669 1.43 69 -37 0.05 59.4
Oct-10 06:15 pm 382.01 0.9 664 1.41 65 -80 0.05 65.7
Oct-10 05:15 pm 382.01 0.9 664 1.72 149 -74 0.05 70.7
Oct-10 04:15 pm 382.05 0.9 682 1.81 182 -43 0.05 69.3
Oct-10 03:15 pm 382.11 1.0 707 1.89 215 -9 0.05 66.2
Oct-10 02:15 pm 382.18 1.0 737 1.99 260 40 0.05 65.3
Oct-10 01:15 pm 382.26 1.1 772 2.10 314 104 0.05 65.7
Oct-10 12:15 pm 382.35 1.1 811 2.40 497 165 0.05 67.5
Oct-10 11:15 am 382.40 1.2 832 1.83 190 198 0.05 68.4
Oct-10 10:15 am 382.41 1.2 836 1.82 186 229 0.05 65.7
Oct-10 09:15 am 382.44 1.2 849 1.99 260 285   59.9
Oct-10 08:15 am 382.46 1.2 858 2.08 303 333 0.05 48.6
Oct-10 07:15 am 382.46 1.2 858 1.92 228 372 0.05 42.8
Oct-10 06:15 am 382.46 1.2 858 1.92 228 401 0.05 43.7
Oct-10 05:15 am 382.44 1.2 849 1.91 224 408 0.05 44.6
Oct-10 04:15 am 382.42 1.2 841 1.89 215 414 0.05 45.0
Oct-10 03:15 am 382.38 1.2 823 1.85 198 392 0.05 45.5
Oct-10 02:15 am 382.33 1.1 802 1.80 179 364 0.05 45.9
Oct-10 01:15 am 382.27 1.1 776 1.73 153 320 0.05 46.8
Oct-10 12:15 am 382.22 1.1 755 1.65 125 293 0.05 48.2
Oct-09 11:15 pm 382.17 1.0 733 1.57 102 276 0.05 50.0
Oct-09 10:15 pm 382.12 1.0 712 1.51 87 268 0.05 52.2
Oct-09 09:15 pm 382.08 1.0 694 1.45 73 264 0.05 54.9
Oct-09 08:15 pm 382.04 0.9 677 1.42 67 256 0.05 59.4
Maximum 24 Hour Drawdown Rate (10 feet/day): 341 cfs + Inflow (-37 cfs) = 305 cfs
Report Generated October 11, 2026 12:22 am