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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 01:15 pm 16.78 1.8 495 7.23 615 576 18.34 74.9
May-16 12:15 pm 16.81 1.8 504 7.23 615 594 18.34 72.8
May-16 11:15 am 16.82 1.8 507 7.24 618 601 18.34 70.3
May-16 10:15 am 16.81 1.8 504 7.23 615 595 18.34 64.4
May-16 09:15 am 16.85 1.9 516 7.24 618 636 18.34 56.1
May-16 08:15 am 16.85 1.9 516 7.24 618 647 18.34 51.7
May-16 07:15 am 16.85 1.9 516 7.24 618 664 18.34 49.8
May-16 06:15 am 16.85 1.9 516 7.24 618 704   48.8
May-16 05:15 am 16.85 1.9 516 7.24 618 721 18.34 48.6
May-16 04:15 am 16.85 1.9 516 7.24 618 762 18.34 48.9
May-16 03:15 am 16.82 1.8 507 7.23 615 772 18.34 49.3
May-16 02:15 am 16.80 1.8 501 7.24 618 812 18.34 50.1
May-16 01:15 am 16.77 1.8 492 7.23 615 846 18.34 50.6
May-16 12:15 am 16.70 1.7 472 7.23 615 874 18.34 50.2
May-15 11:15 pm 16.67 1.7 463 7.23 615 937 18.34 50.3
May-15 10:15 pm 16.60 1.6 443 7.22 612 1,007 18.34 52.1
May-15 09:15 pm 16.55 1.6 429 7.22 612 1,121 18.34 54.5
May-15 08:15 pm 16.46 1.5 402 7.22 612 1,216 18.34 57.0
May-15 07:15 pm 16.37 1.4 376 7.21 608 81 18.34 60.9
May-15 06:15 pm 16.25 1.3 342 7.20 605 72 18.34 61.6
May-15 05:15 pm 16.11 1.1 301 7.19 601 75 18.34 61.4
May-15 04:15 pm 15.91 0.9 245 7.18 598 78 18.34 60.9
May-15 03:15 pm 15.64 0.6 172 7.16 591 49 18.34 58.6
May-15 02:15 pm 15.36 0.4 97 7.14 584 56 18.34 59.6
May-15 01:15 pm 17.23 2.2 629 6.79 463 1,316 18.34 59.8
Maximum 24 Hour Drawdown Rate (5 feet/day): 250 cfs + Inflow (576 cfs) = 826 cfs
Report Generated May 16, 2026 01:19 pm