New England District Corps of Engineers
Geotech Action Status
June 20, 2025 09:55 PM
Legend: Warning Action Required
Project Drain. Area
(sq. mi.)
Invert Elev.
(ft NGVD)
Date/Time Pool
(ft)
6-Hr Change
(ft)
24-Hr Pred.
Stage (ft)
Daily Project
Inspection Level
Precip.
24-Hr (in)
Precip.
48-Hr (in)
Geotech
Recon. Level
Geotech
Recon. % Full
Normal Pool Spillway
UPPER CONNECTICUT RIVER BASIN
Basin Regulator: Margaret DiGiorno
Ball Mountain Dam 172 805.5 20 Jun 09:45 pm 56.90 .18 n/a 75 .00 .02 150.0 36.0 65 Feet (Summer), 35 Feet (Winter) 211.5
North Hartland Dam 220 390 20 Jun 09:45 pm 36.34 -.14 n/a 50 .05 .05 129.0 64.0 35 Feet 156.5
North Springfield Dam 158 452 20 Jun 09:30 pm 15.74 -.03 15.7 45 .00 .13 68.0 50.0 15 Feet 93.5
Otter Brook Dam 47 683 20 Jun 09:45 pm 19.88 -.08 19.6 32 .00 .00 87.0 80.0 20 Feet (Summer), 21 Feet (Winter) 98
Surry Mountain Dam 100 485 20 Jun 09:45 pm 17.07 -.19 16.3 25 .00 .00 57.0 77.0 15 Feet (Summer), 18 Feet (Winter) 65
Townshend Dam 278 457 19 Jun 09:00 pm 22.81 -.05 22.6 32 .02 .19 72.0 50.0 21 Feet 96
Union Village Dam 126 420 20 Jun 09:45 pm 9.13 -.62 6.6 35 .14 .15 90.0 26.0 0 Feet (Summer), 20 Feet (Winter) 144
LOWER CONNECTICUT RIVER BASIN
Basin Regulator: Peter Upham
Barre Falls Dam 55 761 20 Jun 09:45 pm 771.82 -.02 n/a 790 .00 .06 797.0 50.0 772 Feet (Summer), 776 Feet (Winter) 807
Birch Hill Dam 175 815 20 Jun 09:30 pm 2.92 .00 2.9 14 .00 .01 25.0 41.0 0 Feet 37
Colebrook Dam 118 575 20 Jun 09:45 pm 708.20 .00 n/a 718 .01 .02 739.0 55.0 708 Feet NGVD (Normal), 714.5 Feet (Spring) 761
Knightville Dam 162 480 20 Jun 09:45 pm 5.12 -.17 n/a 60 .00 .00 125.0 90.0 0 Feet (Summer), 35 Feet (Winter) 130
Littleville Dam 52 486.5 20 Jun 09:30 pm 519.13 -.04 519.0 528 .01 .04 549.0 46.0 518 Feet NGVD 576
Mad River Dam 18 855 20 Jun 09:30 pm 17.08 -.09 .0 n/a n/a n/a n/a n/a 17 Feet 128
Sucker Brook Dam 3 881 20 Jun 09:30 pm .70 .00 .0 n/a n/a n/a n/a n/a 0 Feet 54
Tully Dam 50 625 20 Jun 09:45 pm 16.66 -.02 16.6 25 .00 .01 32.0 49.0 16 Feet (Summer), 13 Feet (Winter) 43
MERRIMACK RIVER BASIN
Basin Regulator: Laura Fraser
Blackwater Dam 128 515 20 Jun 09:30 pm 519.47 -.11 519.0 540 .00 .00 561.0 72.0 516 Feet NGVD 566
Edward Macdowell Dam 44 904 20 Jun 09:45 pm 912.26 -.03 912.1 918 .01 .01 929.0 39.0 911.5 Feet NGVD 946
Everett Dam 64 325 20 Jun 09:45 pm 341.22 .00 341.2 347 .00 .00 375.0 8.0 340.5 Feet NGVD 418
Franklin Falls Dam 1000 300 20 Jun 09:30 pm 307.42 -.03 307.2 320 .00 .00 375.0 73.0 307 Feet NGVD 389
Hopkinton Dam 426 366 20 Jun 09:30 pm 382.32 -.28 n/a 388 .00 .00 395.0 19.0 380 Feet NGVD(Summer), 382 Feet NGVD(Winter) 416
NAUGATUCK RIVER BASIN
Basin Regulator: Laura Fraser
Black Rock Dam 20 410 20 Jun 09:30 pm 27.15 -.02 27.1 45 .00 .11 80.0 44.0 27 Feet 110
East Branch Dam 9 798 20 Jun 09:30 pm .78 -.04 .0 n/a n/a n/a n/a n/a 0 Feet 67
Hop Brook Dam 16 292 20 Jun 09:45 pm 19.27 -.02 n/a 30 .01 .04 45.0 25.0 18.5 Feet 72
Hancock Brook Dam 12 454 20 Jun 09:30 pm 7.34 -.01 7.3 17 n/a n/a 23.0 56.0 7 Feet 30
Hall Meadow Dam 17 850 20 Jun 09:30 pm 9.37 -.07 9.1 n/a n/a n/a n/a n/a 9 Feet 48
Northfield Brook Dam 6 480.5 20 Jun 09:30 pm 22.57 .02 .0 30 n/a n/a 61.0 30.0 22.5 Feet 95.5
Thomaston Dam 97 380 20 Jun 09:30 pm 4.64 -.12 4.2 40 .01 .09 76.0 35.0 0 Feet 114
THAMES RIVER BASIN
Basin Regulator: Stephen Kissock, P.E.
Buffumville Dam 27 481.5 20 Jun 09:30 pm 11.46 -.01 11.4 19 .00 .00 27.5 40.0 11 Feet 42.5
East Brimfield Dam 67 619 20 Jun 09:45 pm 13.53 -.01 13.5 16 .00 .00 23.0 31.0 13 Feet 34
Hodges Village Dam 31 465.5 20 Jun 09:45 pm 2.83 -.02 2.7 15 .00 .00 19.0 27.0 0 Feet 35.5
Mansfield Hollow Dam 159 195 20 Jun 09:30 pm 18.75 -.10 18.3 25 .00 .00 40.0 35.0 16.5 Feet (Summer), 15 Feet (Winter), 18.5 Feet (Spring) 62
West Thompson Dam 172 292 20 Jun 09:30 pm 15.26 .05 15.4 20 .00 .00 37.0 46.0 15 Feet 50.5
Westville Dam 99 515 20 Jun 09:45 pm 11.23 -.05 11.1 20 .00 .00 35.0 15.0 10.5 Feet 57
BLACKSTONE RIVER BASIN
Basin Regulator: Stephen Kissock, P.E.
Woonsocket Falls Dam 369 20 Jun 09:30 pm .41 -.12 n/a n/a .00 .00 n/a n/a 0 Feet n/a
West Hill Dam 28 234 20 Jun 09:30 pm 2.44 -.02 2.4 15 .00 .00 19.0 34.0 2 Feet 30