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New England District Corps of Engineers
Projects
May 16, 2026 01:33 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
UPPER CONNECTICUT RIVER BASIN
Basin Regulator: Jeremy Kellett
Union Village Dam 126 16 MAY 01:30 pm 26.90 -4.07 12.8 1 5.57 1,225 1,073 .00 1.43 2.40 0 144
North Hartland Dam 220 16 MAY 01:30 pm 36.37 -.12 35.8 1 5.84 875 818 .00 1.01 1.81 35 156.5
North Springfield Dam 158 16 MAY 12:30 pm 16.47 -.17 16.6 1 5.90 683 696 .00 .91 1.92 15 93.5
Ball Mountain Dam 172 16 MAY 01:15 pm 57.25 -.62 n/a 3 5.76 n/a n/a --- --- --- 65 211.5
Townshend Dam 278 16 MAY 01:15 pm 23.71 -.04 23.6 1 5.75 881 875 .00 .45 1.31 21 96
Surry Mountain Dam 100 16 MAY 01:15 pm 16.78 -.07 16.5 2 5.85 615 576 .00 .41 1.46 15 65
Otter Brook Dam 47 16 MAY 01:15 pm 24.18 -.42 22.3 3 6.80 322 242 .00 .87 1.97 20 98
LOWER CONNECTICUT RIVER BASIN
Basin Regulator: Peter Upham
Birch Hill Dam 175 16 MAY 12:30 pm 6.41 n/a n/a 3 5.21 868 n/a --- --- --- 0 37
Tully Dam 50 16 MAY 12:30 pm 17.02 .18 17.7 6 7.57 27 147 .00 .56 1.80 16 43
Barre Falls Dam 55 16 MAY 01:30 pm 772.48 -.06 n/a 0 8.17 n/a n/a --- --- --- 772 807
Conant Brook Dam 8 16 MAY 12:30 pm 2.30 -.21 2.4 0 8.99 26 26 .00 .59 2.04 0 64
Knightville Dam 162 16 MAY 01:30 pm 3.06 -.10 7.4 0 5.69 258 274 .05 .20 .64 35 130
Littleville Dam 52 16 MAY 12:30 pm 519.14 -.02 519.1 2 8.19 67 56 .07 .29 .92 518 576
Colebrook Dam 118 16 MAY 12:30 pm 710.49 -.02 710.4 4 7.68 140 96 .01 .01 .05 708 761
Mad River Dam 18 16 MAY 12:30 pm 17.43 -.02 17.3 0 9.79 19 18 --- --- --- 17 128
Sucker Brook Dam 3 16 MAY 12:30 pm 1.29 .00 .0 0 8.10 2 2 --- --- --- 0 54
MERRIMACK RIVER BASIN
Basin Regulator: Margaret DiGiorno
Franklin Falls Dam 1000 16 MAY 12:30 pm 327.80 -.24 327.2 11 2.51 14,510 14,088 .00 1.19 3.42 307 389
Blackwater Dam 128 16 MAY 12:30 pm 535.35 1.11 537.8 4 6.46 1,589 1,938 .01 1.35 2.95 516 566
Edward Macdowell Dam 44 16 MAY 01:30 pm 914.60 -.03 914.5 6 5.13 320 310 .01 1.51 3.13 911.5 946
Hopkinton Dam 426 16 MAY 12:30 pm 386.05 -.36 384.0 4 6.39 3,036 2,426 .00 1.30 2.72 380 416
Everett Dam 64 16 MAY 01:30 pm 343.62 -.03 343.4 0 6.78 306 294 .00 .79 1.36 340.5 418
NAUGATUCK RIVER BASIN
Basin Regulator: Margaret DiGiorno
Thomaston Dam 97 16 MAY 01:00 pm 7.23 -1.13 n/a 0 8.09 n/a n/a .02 .28 .84 0 114
Black Rock Dam 20 16 MAY 12:30 pm 27.19 .00 27.2 0 7.80 6 6 .01 .21 .79 27 110
Hop Brook Dam 16 16 MAY 01:15 pm 19.23 -.01 n/a 0 7.76 n/a n/a .00 .43 1.17 18.5 72
Northfield Brook Dam 6 16 MAY 01:15 pm 22.56 .04 22.5 0 7.69 11 11 --- --- --- 22.5 95.5
Hancock Brook Dam 12 16 MAY 12:30 pm 7.34 -.01 7.3 2 6.00 64 63 --- --- --- 7 30
East Branch Dam 9 16 MAY 12:30 pm 1.67 -.03 .0 0 8.80 25 25 --- --- --- 0 67
Hall Meadow Dam 17 16 MAY 12:30 pm 4.06 .13 n/a 1 9.32 n/a n/a --- --- --- 9 48
THAMES RIVER BASIN
Basin Regulator: Stephen Kissock, P.E.
Buffumville Dam 27 16 MAY 12:30 pm 11.80 .00 11.8 2 7.89 69 68 .00 .65 1.77 11 42.5
Hodges Village Dam 31 16 MAY 12:30 pm 3.88 -.04 3.8 0 7.98 68 67 .00 .72 1.69 0 35.5
East Brimfield Dam 67 16 MAY 12:30 pm 14.15 .02 14.2 1 8.17 219 236 .00 .64 1.87 13 34
Westville Dam 99 16 MAY 01:15 pm 12.31 .04 11.8 1 6.40 309 300 .00 .39 1.88 10.5 57
West Thompson Dam 172 16 MAY 12:30 pm 15.75 -.01 15.7 3 6.33 315 311 .00 .58 1.58 15 50.5
Mansfield Hollow Dam 159 16 MAY 12:30 pm 20.37 -.16 19.7 3 5.58 633 474 .00 .02 1.14 16.5 62
BLACKSTONE RIVER BASIN
Basin Regulator: Stephen Kissock, P.E.
West Hill Dam 28 16 MAY 12:30 pm 2.77 -.04 2.7 1 8.29 56 55 .00 .23 .71 2 30
Woonsocket Falls Dam 369 16 MAY 01:30 pm 1.59 -.07 n/a n/a n/a n/a n/a .00 .19 .52 ---