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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 November 14, 2025 07:00 am Gate 1 Gate 2 Gate 3 Gate 4 Gate 5 Gate 6 Gate 7 Gate 8
  0.0 0.0 0.0 0.0 8.0 8.0    
Date Time
(Eastern)		 Pool
(ft)		 Storage
(%)		 Storage
(ac-ft)		 Tailwater
(ft)		 Flow
(cfs)		 Inflow
(cfs)		 Precip
(in)		 Air Temp
(F)
Nov-17 07:00 am 382.44 1.2 849       6.32  
Nov-17 06:00 am 382.43 1.2 845 2.05 303 319 6.32 33.8
Nov-17 05:00 am 382.43 1.2 845 2.05 303 317 6.32 33.8
Nov-17 04:00 am 382.42 1.2 841 2.05 303 308 6.32 33.8
Nov-17 03:00 am 382.42 1.2 841 2.04 298 316 6.32 34.2
Nov-17 02:00 am 382.42 1.2 841 2.05 303 316 6.32 34.7
Nov-17 01:00 am 382.42 1.2 841 2.04 298 324 6.32 34.7
Nov-17 12:00 am 382.41 1.2 836 2.04 298 314 6.32 35.6
Nov-16 11:00 pm 382.41 1.2 836 2.04 298 322 6.32 36.0
Nov-16 10:00 pm 382.41 1.2 836 2.04 298 312 6.32 36.9
Nov-16 09:00 pm 382.40 1.2 832 2.04 298 311 6.32 37.4
Nov-16 08:00 pm 382.40 1.2 832 2.04 298 310 6.32 37.4
Nov-16 07:00 pm 382.39 1.2 828 2.02 289 309 6.31 39.2
Nov-16 06:00 pm 382.39 1.2 828 2.03 294 300 6.30 41.0
Nov-16 05:00 pm 382.38 1.2 823 2.03 294 300 6.30 43.2
Nov-16 04:00 pm 382.39 1.2 828 2.03 294 316 6.30 45.0
Nov-16 03:00 pm 382.38 1.2 823 2.02 289 306 6.30 46.8
Nov-16 02:00 pm 382.38 1.2 823 2.02 289 305 6.30 47.7
Nov-16 01:00 pm 382.37 1.2 819 2.02 289 305 6.30 47.7
Nov-16 12:00 pm 382.38 1.2 823 2.02 289 312 6.30 47.3
Nov-16 11:00 am 382.37 1.2 819 2.02 289 311 6.30 44.6
Nov-16 10:00 am 382.36 1.2 815 2.02 289   6.30 41.0
Nov-16 09:00 am 382.36 1.2 815 2.01 284 309 6.30 38.7
Nov-16 08:00 am 382.36 1.2 815 2.01 284 316 6.30 37.8
Nov-16 07:00 am 382.35 1.1 811 2.01 284 307 6.30 37.4
Maximum 24 Hour Drawdown Rate (10 feet/day): 428 cfs + Inflow (319 cfs) = 747 cfs
Report Generated November 17, 2025 07:14 am