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Mansfield Hollow Dam, Natchaug River
Mansfield Hollow Dam, Natchaug River
 Drainage Area: 159 sq. miles 
 Channel Capacity: 2,900 cfs 
 Storage at Spillway Crest: 5.8 in / 52,000 ac-ft  
 Normal Pool: 16.5 Feet (Summer), 15 Feet (Winter), 18.5 Feet (Spring) 
 Gate Settings for October 10, 2026 09:37 am Gate 1 Gate 2 Gate 3 Gate 4 Gate 5 Gate 6 Gate 7 Gate 8
  1.0 0.0 0.0 0.0 0.0      
Date Time (EDT) Pool
(ft)		 Storage
(%)		 Storage
(ac-ft)		 Tailwater
(ft)		 Flow
(cfs)		 Inflow
(cfs)		 Inflow Test
(cfs)		 Precip
(in)		 Air Temp
(F)
Oct-10 06:30 pm 16.88 0.3 2,952 1.57 61 53   0.16 58.4
Oct-10 05:30 pm 16.88 0.3 2,952 1.57 61 54 38 0.16 66.5
Oct-10 04:30 pm 16.88 0.3 2,952 1.57 61 54 38 0.16 66.9
Oct-10 03:30 pm 16.88 0.3 2,952 1.57 61 54 38 0.16 67.5
Oct-10 02:30 pm 16.88 0.3 2,952 1.57 61 54 38 0.16 68.1
Oct-10 01:30 pm 16.88 0.3 2,952 1.59 63 47 37 0.16 67.2
Oct-10 12:30 pm 16.89 0.3 2,956 1.59 63 55 37 0.16 67.4
Oct-10 11:30 am 16.89 0.3 2,956 1.58 62 55 37 0.16 62.7
Oct-10 10:30 am 16.89 0.3 2,956 1.59 63 55 36 0.16 58.3
Oct-10 09:30 am 16.89 0.3 2,956 1.59 63 55 36 0.16 53.6
Oct-10 08:30 am 16.89 0.3 2,956 1.59 63 55 35 0.16 44.9
Oct-10 07:30 am 16.90 0.3 2,960 1.58 62 56 36 0.16 40.2
Oct-10 06:30 am 16.90 0.3 2,960 1.59 63 56 36 0.16 40.4
Oct-10 05:30 am 16.90 0.3 2,960 1.58 62 56 36 0.16 40.5
Oct-10 04:30 am 16.90 0.3 2,960 1.59 63 57 37 0.16 41.5
Oct-10 03:30 am 16.90 0.3 2,960 1.59 63 57 37 0.16 42.4
Oct-10 02:30 am 16.90 0.3 2,960 1.61 66 50 37 0.16 43.1
Oct-10 01:30 am 16.91 0.3 2,964 1.60 65 58 37 0.16 44.5
Oct-10 12:30 am 16.91 0.3 2,964 1.60 65 59 38 0.16 45.1
Oct-09 11:30 pm 16.91 0.3 2,964 1.60 65 59 38 0.16 46.7
Oct-09 10:30 pm 16.91 0.3 2,964 1.61 66 60 38 0.16 48.5
Oct-09 09:30 pm 16.91 0.3 2,964 1.62 67 52 38 0.16 51.9
Oct-09 08:30 pm 16.92 0.3 2,968 1.64 70 60 38 0.16 52.4
Oct-09 07:30 pm 16.92 0.3 2,968 1.62 67 60 38 0.16 54.9
Oct-09 06:30 pm 16.92 0.3 2,968 1.62 67 52 38 0.16 60.0
Maximum 24 Hour Drawdown Rate (5 feet/day): 970 cfs + Inflow (53 cfs) = 1,023 cfs
Report Generated October 10, 2026 10:54 pm