HUDSON RIVER BASIN
01334000 WALLOOMSAC RIVER NEAR NORTH BENNINGTON, VT
LOCATION.--Lat 42°54'47", long 73°15'25", Bennington County, Hydrologic Unit 02020003, on left bank, 0.6 mi downstream
from Paran Creek and 1.4 mi south of North Bennington.
DRAINAGE AREA.--111 mi².
PERIOD OF RECORD.--Discharge records: June 1931 to current year.
Water-quality records: Water years 1953-54.
REVISED RECORDS.--WSP 781: 1933(M).
GAGE.--Water-stage recorder. Elevation of gage is 525 ft above sea level, from topographic map.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Occasional diurnal fluctuation at
low flow caused by mills upstream; diurnal fluctuation greater prior to 1960.
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 2,000 ft³/s and maximum (*):
Discharge Gage height Discharge Gage height
Date Time (ft³/s) (ft) Date Time (ft³/s) (ft)
Dec. 2 0900 * 5,290 * 9.24 No other peak greater than base discharge.
Minimum discharge, 27 ft³/s, August 11.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 103 141 838 e260 132 350 536 361 147 45 32 51
2 84 130 3000 291 126 441 435 454 144 45 31 46
3 75 121 899 329 120 468 405 488 133 46 32 62
4 69 119 533 329 115 337 449 676 121 54 32 54
5 67 117 409 326 197 295 498 424 114 55 42 44
6 65 111 356 420 190 426 650 488 106 49 37 40
7 63 110 317 309 147 325 1040 561 102 47 33 39
8 63 119 307 e233 131 e256 710 403 100 59 32 39
9 214 534 271 220 117 e236 445 364 93 129 31 40
10 221 353 245 241 e114 e244 357 423 85 133 29 36
11 253 236 231 219 e110 235 321 431 82 77 32 35
12 161 192 285 e191 108 216 316 355 80 61 38 64
13 125 169 361 190 e99 e189 522 318 115 52 69 56
14 120 154 301 187 e96 e175 416 291 99 46 79 48
15 111 139 272 181 103 e214 354 272 80 53 49 45
16 102 131 249 223 99 e190 340 258 71 80 50 41
17 103 129 283 e172 96 e180 359 253 73 56 99 37
18 96 128 402 e155 102 179 430 246 82 62 55 43
19 87 154 380 e136 180 173 405 242 91 51 43 41
20 597 165 326 e134 271 174 382 446 79 46 38 49
21 547 146 268 e143 271 169 404 313 71 46 52 74
22 337 132 243 e154 603 210 416 285 65 46 64 52
23 255 124 233 175 424 190 401 258 59 41 52 46
24 296 118 431 e137 289 165 382 232 60 38 47 54
25 239 116 790 180 e205 159 343 218 68 38 40 46
26 198 361 401 189 222 479 324 206 69 35 37 41
27 176 329 332 e134 462 352 314 190 67 35 35 40
28 174 214 301 e167 544 337 493 178 60 36 36 38
29 168 192 388 e138 --- 464 476 166 54 36 49 96
30 153 175 519 e130 --- 663 371 158 49 35 52 128
31 156 --- 334 126 --- 676 --- 157 --- 34 42 ---
TOTAL 5478 5359 14505 6419 5673 9167 13294 10115 2619 1666 1389 1525
MEAN 177 179 468 207 203 296 443 326 87.3 53.7 44.8 50.8
MAX 597 534 3000 420 603 676 1040 676 147 133 99 128
MIN 63 110 231 126 96 159 314 157 49 34 29 35
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 1997, BY WATER YEAR (WY)
MEAN 150 211 215 192 181 320 540 327 175 121 103 115
MAX 418 413 471 425 575 958 1008 742 414 311 481 585
(WY) 1976 1960 1974 1937 1981 1936 1969 1943 1972 1935 1976 1938
MIN 30.9 39.6 94.6 61.6 54.2 68.0 215 116 53.1 39.8 41.2 25.6
(WY) 1965 1965 1948 1965 1980 1965 1946 1987 1964 1964 1964 1964
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1931 - 1997
ANNUAL TOTAL 113399 77209
ANNUAL MEAN 310 212 221
HIGHEST ANNUAL MEAN 362 1976
LOWEST ANNUAL MEAN 98.9 1965
HIGHEST DAILY MEAN 3000 Dec 2 3000 Dec 2 6350 Dec 31 1948
LOWEST DAILY MEAN 43 Sep 4 29 Aug 10 a 21 Sep 22 1964
ANNUAL SEVEN-DAY MINIMUM 44 Sep 2 33 Jul 29 22 Sep 20 1964
INSTANTANEOUS PEAK FLOW 5290 Dec 2 b 8450 Sep 21 1938
INSTANTANEOUS PEAK STAGE 9.24 Dec 2 12.04 Sep 21 1938
INSTANTANEOUS LOW FLOW 27 Aug 11 4.0 Sep 27 1932
10 PERCENT EXCEEDS 651 431 459
50 PERCENT EXCEEDS 193 155 141
90 PERCENT EXCEEDS 66 41 57
a Also occurred on September 23, 1964 and July 12, 1965.
b From rating curve extended above 2,800 ft³/s on basis of contracted-opening measurements at gage heights 10.13 ft,
10.49 ft, 11.50 ft, and 12.04 ft and slope area measurement and computation of flow over dam at
gage height 12.04 ft.
e Estimated.
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