ST. LAWRENCE RIVER BASIN
04286000 WINOOSKI RIVER AT MONTPELIER, VT
LOCATION.--Lat°44 15'23", long 72°35'36", Washington County, Hydrologic Unit 02010003, on right bank, 0.4 mi upstream
from Dog River and 1 mi downstream from railroad depot at Montpelier.
DRAINAGE AREA.--397 mi².
PERIOD OF RECORD.--Discharge records: May 1909 to June 1914 (fragmentary), July 1914 to September 1923, August 1928 to
current year.
REVISED RECORDS.--WSP 424: 1915. WSP 894: Drainage area. WSP 1437: 1912-14(M), 1915-18, 1919(M), 1920, 1921(M),
1922-23, 1929, 1933, 1934(M), 1936, 1937(M), 1938, 1946(M), WDR MA-NH-RI-VT-72-1: 1969(M), 1970(P), 1971(M).
GAGE.--Water-stage recorder. Datum of gage is 499.99 ft above sea level. Prior to June 16, 1914, nonrecording gage at
site 0.9 mi upstream at different datum. June 16 to July 3, 1914, nonrecording gage at present site and datum.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Flow regulated by several small
powerplants upstream, by Peacham Pond and, since 1926, by Mollys Falls Reservoir, combined usable capacity,
492 million ft³, which regulated runoff from 24 mi², and by East Barre and Wrightsville Detention Reservoirs since
1935 (Reservoirs in Winooski River Basin).
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge since at least 1830, 57,000 ft³/s, November 3, 1927, gage height,
27.1 ft, from rating curve extended above 9,090 ft³/s.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 5,500 ft³/s, December 2, gage height 9.86 ft; minimum daily discharge,
115 ft³/s, August 8.
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
1 273 440 420 e450 e300 e850 1660 1350 547 135 133 350
2 179 343 3820 e490 e280 e920 1260 1990 684 132 124 348
3 199 342 2700 e760 e310 e1350 1180 1410 534 288 180 354
4 192 330 1900 e780 e380 e980 1240 1540 474 776 168 327
5 153 379 1580 606 e330 873 1470 1240 425 439 152 287
6 151 429 1040 865 e320 781 2660 1300 385 245 146 213
7 140 407 901 739 e350 782 3350 2230 361 188 131 206
8 143 351 823 e470 e270 662 3060 1570 265 178 115 228
9 221 1290 699 e450 e240 596 2320 1280 271 330 126 200
10 327 1860 710 e500 e270 e560 1830 1300 264 576 133 187
11 469 964 709 e540 e290 e540 1340 1350 214 341 139 173
12 341 707 666 e430 e300 e520 1220 1140 227 207 184 232
13 244 579 741 e410 e300 e520 1210 1140 246 178 656 229
14 220 480 656 e440 e270 e510 1260 1020 265 199 1710 191
15 184 377 710 e490 e250 e490 1140 928 215 1840 1210 179
16 176 352 717 e450 e240 e450 1160 940 186 2520 655 158
17 171 404 780 e400 e220 e420 1500 1080 206 1590 444 151
18 172 407 1350 e330 e230 e410 1880 854 294 1250 418 147
19 160 408 1350 e290 e400 e415 2290 838 1030 726 315 143
20 162 547 1090 e310 e620 e420 2170 997 550 470 279 150
21 2700 559 760 e300 e640 e405 1980 799 429 333 393 185
22 3030 521 756 e310 e1500 e410 1860 726 559 331 1440 178
23 2110 446 731 e460 e1800 e390 1740 694 608 254 1040 164
24 1360 406 1030 e380 e1150 e400 1670 611 357 231 665 201
25 979 372 2000 e430 e800 e435 1500 563 283 204 511 192
26 633 425 1030 e340 e760 603 1380 527 272 187 405 232
27 437 405 966 e300 e840 716 1310 489 225 175 395 213
28 407 358 839 e340 e1300 778 1660 479 188 183 1180 144
29 385 411 842 e360 --- 1180 1890 455 165 190 802 286
30 383 362 1110 e310 --- 1760 1390 445 148 165 545 533
31 548 --- 662 e270 --- 1780 --- 455 --- 144 369 ---
TOTAL 17249 15661 34088 14000 14960 21906 51580 31740 10877 15005 15163 6781
MEAN 556 522 1100 452 534 707 1719 1024 363 484 489 226
MAX 3030 1860 3820 865 1800 1780 3350 2230 1030 2520 1710 533
MIN 140 330 420 270 220 390 1140 445 148 132 115 143
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 1923, 1928 - 1997, BY WATER YEAR (WY)
MEAN 385 516 491 423 390 896 1870 959 476 270 239 229
MAX 1432 1164 1504 1226 1475 3442 3275 2374 1785 1245 1008 934
(WY) 1946 1991 1984 1935 1981 1936 1933 1972 1947 1973 1990 1938
MIN 74.3 152 126 109 91.6 153 555 254 131 88.5 87.1 60.1
(WY) 1964 1979 1915 1940 1940 1940 1995 1921 1995 1991 1952 1921
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1914 - 1923, 1928 - 1997
ANNUAL TOTAL 321937 249010
ANNUAL MEAN 880 682 595
HIGHEST ANNUAL MEAN 967 1976
LOWEST ANNUAL MEAN 270 1965
HIGHEST DAILY MEAN 5500 Jan 20 3820 Dec 2 12200 Mar 18 1936
LOWEST DAILY MEAN 97 Sep 24 115 Aug 8 17 Sep 3 1933
ANNUAL SEVEN-DAY MINIMUM 113 Sep 2 135 Aug 5 49 Sep 10 1957
INSTANTANEOUS PEAK FLOW 5500 Dec 2 17200 Apr 7 1912
INSTANTANEOUS PEAK STAGE 9.86 Dec 2 17.55 Jun 30 1973
INSTANTANEOUS LOW FLOW 101 Aug 8
10 PERCENT EXCEEDS 2220 1500 1420
50 PERCENT EXCEEDS 537 444 328
90 PERCENT EXCEEDS 176 178 118
e Estimated.
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