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Basin Index

New England District Corps of Engineers
Projects
June 11, 2026 09:53 PM
Legend: Pool >50% Full Spillway Discharge (pool stage > spillway)
  Storage Flow Rainfall Pool
Project Drain.
Area
( mi2 )
Date/Time Pool
(ft)
6 Hr Change
(ft)
24 Hr Pred.
Stage
(ft)
% Cap. Avail.
per Drain. Area
(in)
Outflow
(cfs)
Inflow
(cfs)
24hr
(in)
48hr
(in)
7-Day
(in)
Normal Spillway
NAUGATUCK RIVER BASIN
Basin Regulator: Margaret DiGiorno
Thomaston Dam 97 11 JUN 09:30 pm 10.22 .63 11.4 0 8.09 42 51 .25 .25 .59 0 114
Black Rock Dam 20 11 JUN 09:30 pm 27.11 .04 27.2 0 7.80 3 4 .17 .17 .49 27 110
Hop Brook Dam 16 11 JUN 09:45 pm 19.36 .30 n/a 0 7.76 n/a n/a .54 .54 .80 18.5 72
Northfield Brook Dam 6 11 JUN 09:30 pm 22.41 .03 22.6 0 7.70 10 11 --- --- --- 22.5 95.5
Hancock Brook Dam 12 11 JUN 09:30 pm 7.15 .01 7.2 1 6.02 40 40 --- --- --- 7 30
East Branch Dam 9 11 JUN 09:30 pm .87 -.04 1.2 0 8.80 14 14 --- --- --- 0 67
Hall Meadow Dam 17 11 JUN 09:30 pm 4.67 -.02 n/a 1 9.29 n/a n/a --- --- --- 9 48


New England District Corps of Engineers
River Gages
June 11, 2026 09:53 PM
Legend: Warning Stage Flood Stage
Gage Drainage
Area
( mi2 )
Date/Time Stage
(ft)
Q
(cfs)
6 Hour
Change
Stage (ft)
6 Hour
Change
Flow (cfs)
CSM
Q/DA
Warning
Flow
Warning
Stage
Flood
Flow
Flood
Stage
NAUGATUCK RIVER BASIN
Basin Regulator: Margaret DiGiorno
Naugatuck River @ Waterbury, Ct 174 11 JUN 09:30 pm 6.87 87 .13 26 .5 2190 10 5250 12.8
Naugatuck River @ Beacon Falls, Ct 259 11 JUN 09:30 pm 1.64 206 .44 81 .8 3990 7 9950 10.7
Housatonic River @ Stevenson, Ct 1545 11 JUN 09:30 pm 5.63 2,673 3.15 2,211 1.7 13700 11 27200 15