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Surry Mountain Dam, Ashuelot River
Surry Mountain Dam, Ashuelot River
 Drainage Area: 100 sq. miles 
 Channel Capacity: 1,250 cfs 
 Storage at Spillway Crest: 5.94 in / 31,694 ac-ft  
 Normal Pool: 15 Feet (Summer), 18 Feet (Winter) 
 Gate Settings for May 15, 2026 03:17 pm Gate 1 Gate 2 E. Gate Loc. E. Gate Pos. Gate 5 Gate 6 Gate 7 Gate 8
  3.0 2.7 1          
Date Time
(Eastern)		 Pool
(ft)		 Storage
(%)		 Storage
(ac-ft)		 Tailwater
(ft)		 Flow
(cfs)		 Inflow
(cfs)		 Precip
(in)		 Air Temp
(F)
May-16 01:30 pm 16.77 1.8 492 7.23 615 570 18.34 75.3
May-16 12:30 pm 16.81 1.8 504 7.23 615 594 18.34 73.3
May-16 11:30 am 16.81 1.8 504 7.23 615 595 18.34 70.8
May-16 10:30 am 16.81 1.8 504 7.24 618 595 18.34 65.1
May-16 09:30 am 16.84 1.8 513 7.24 618 612 18.34 58.4
May-16 08:30 am 16.85 1.9 516 7.24 618 647 18.34 53.3
May-16 07:30 am 16.85 1.9 516 7.24 618 670 18.34 49.5
May-16 06:30 am 16.85 1.9 516 7.24 618 705 18.34 49.2
May-16 05:30 am 16.85 1.9 516 7.24 618 722 18.34 48.5
May-16 04:30 am 16.85 1.9 516 7.24 618 762 18.34 49.0
May-16 03:30 am 16.85 1.9 516 7.23 615 784 18.34 49.2
May-16 02:30 am 16.80 1.8 501 7.24 618 813 18.34 49.6
May-16 01:30 am 16.76 1.8 489 7.23 615 829 18.34 50.2
May-16 12:30 am 16.70 1.7 472 7.23 615 863 18.34 50.8
May-15 11:30 pm 16.67 1.7 463 7.22 612 902 18.34 51.1
May-15 10:30 pm 16.60 1.6 443 7.22 612 959 18.34 52.0
May-15 09:30 pm 16.56 1.6 431 7.22 612 1,052 18.34 54.5
May-15 08:30 pm 16.46 1.5 402 7.21 608 1,195 18.34 56.3
May-15 07:30 pm 16.39 1.4 382 7.21 608 74 18.34 60.6
May-15 06:30 pm 16.27 1.3 347 7.21 608 72 18.34 60.7
May-15 05:30 pm 16.17 1.2 318 7.19 601 110 18.34 61.5
May-15 04:30 pm 16.00 1.0 269 7.18 598 115 18.34 60.7
May-15 03:30 pm 15.78 0.8 210 7.17 595 107 18.34 59.3
May-15 02:30 pm 15.40 0.4 108 7.14 584 42 18.34 59.9
May-15 01:30 pm 17.27 2.3 641 6.79 463 1,288 18.34 59.5
Maximum 24 Hour Drawdown Rate (5 feet/day): 248 cfs + Inflow (570 cfs) = 818 cfs
Report Generated May 16, 2026 05:40 pm