ST. LAWRENCE RIVER BASIN
04290500 WINOOSKI RIVER NEAR ESSEX JUNCTION, VT
LOCATION.--Lat 44°28'44", long 73°08'21", Chittenden County, Hydrologic Unit 02010003, on right bank, 0.5 mi downstream
from Muddy Brook and 2 mi southwest of Essex Junction.
DRAINAGE AREA.--1,044 mi².
PERIOD OF RECORD.--Discharge records: October 1928 to current year.
Water-quality records: Water years 1953, 1976-79.
REVISED RECORDS.--WSP 714: 1930(M). WSP 894: Drainage area. WSP 1307: 1929(M).
GAGE.--Water-stage recorder. Elevation of gage is 185 ft above sea level, from topographic map; prior to
October 1, 1964, datum was 1.00 ft higher.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Flow regulated by powerplants
upstream, by Peacham Pond and Mollys Falls Reservoir, combined usable capacity, 492 million ft³ by Waterbury
Reservoir (station 04288500) since 1937, and by East Barre and Wrightsville Detention Reservoirs (Reservoirs in
Winooski River Basin) since 1935. See table with station 04286000 for monthend contents in Peacham Pond and Mollys
Falls Reservoir.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge since at least 1830, 113,000 ft³/s, November 4, 1927, gage
height, 50.4 ft, present datum, from floodmarks, from rating curve extended above 27,000 ft³/s on basis of
computations of flow over dam at gage heights 19.72, 24.54, and 51.4 ft, and slope-area measurements at gage height
51.4 ft, all at present datum.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 20,700 ft³/s, December 2, gage height, 13.64 ft; minimum daily
discharge, 324 ft³/s, August 10.
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
1 859 1240 1800 1540 e1070 3290 5130 3830 1350 338 371 1110
2 572 929 14900 1760 e980 3400 3540 5890 1940 349 341 1280
3 520 894 11000 2040 e920 4580 3290 4200 1840 359 367 732
4 557 1030 5540 2130 859 3140 3310 4600 1450 1460 513 994
5 514 976 4110 2070 1100 2690 3680 3690 1450 1140 463 962
6 402 1340 3300 2750 1040 2350 6590 3570 1260 1200 458 793
7 413 1100 2540 2440 918 2190 9640 7790 1160 588 565 562
8 424 1370 2570 1930 797 1960 8470 4800 973 626 358 661
9 529 5700 2370 1220 780 1840 5380 3620 837 998 378 592
10 933 8090 2210 1070 797 1930 4070 3390 897 1750 324 607
11 1330 3920 2080 1510 986 e1900 3270 3530 602 1100 466 862
12 1010 2670 2030 1760 1020 e1700 2950 3250 638 876 828 892
13 614 2310 2140 1550 e980 e1450 2860 3220 575 885 1230 959
14 640 1770 2270 1340 e960 e1420 3080 2920 731 780 4380 537
15 735 1270 2310 1280 e900 e1410 2800 2720 631 1200 2480 494
16 533 1390 2230 1160 e900 e1600 2540 2620 581 4170 1970 487
17 439 1410 2340 e1300 e880 e1400 2850 2760 591 2810 1490 437
18 491 1350 3010 e1390 e940 e1390 3550 2630 794 2860 876 441
19 483 1530 3160 e1400 e1150 e1280 4450 2130 1260 1960 690 528
20 401 1470 2670 e1450 e1450 e1300 4930 2440 1750 1380 750 447
21 5250 1680 2040 e1520 e1900 e1250 4780 2410 926 1050 1120 466
22 9320 1760 1840 e1470 5590 1170 4510 2430 1100 797 2810 492
23 6400 1580 1930 e1580 11100 907 4060 3070 1670 698 2560 490
24 4260 1270 2470 e1750 4790 1000 3720 2540 1200 687 1980 517
25 3170 1180 6290 e1500 2640 1090 3200 2250 1040 581 1400 519
26 2060 1240 3370 e1350 2400 1210 2970 2260 631 515 1350 558
27 1610 1280 2740 e1250 2680 1730 2890 1930 613 439 1080 589
28 1350 1070 2560 e1100 4160 1840 3830 1880 657 438 1780 482
29 1170 1170 2500 e1120 --- 3890 5330 1550 646 442 2110 661
30 859 1550 3180 e1100 --- 6230 4000 1370 466 577 1470 1700
31 1550 --- 2130 e1090 --- 5740 --- 1410 --- 471 849 ---
TOTAL 49398 55539 105630 47920 54687 68277 125670 96700 30259 33524 37807 20851
MEAN 1593 1851 3407 1546 1953 2202 4189 3119 1009 1081 1220 695
MAX 9320 8090 14900 2750 11100 6230 9640 7790 1940 4170 4380 1700
MIN 401 894 1800 1070 780 907 2540 1370 466 338 324 437
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1929 - 1997, BY WATER YEAR (WY)
MEAN 1141 1588 1504 1308 1239 2566 5151 2834 1292 765 720 691
MAX 4587 3525 4549 3578 4266 9642 9256 6826 5027 3368 3284 3096
(WY) 1946 1984 1974 1996 1981 1936 1933 1972 1947 1973 1976 1938
MIN 245 389 378 350 337 554 1477 846 364 297 225 231
(WY) 1964 1954 1930 1931 1940 1940 1995 1965 1938 1965 1934 1963
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1929 - 1997
ANNUAL TOTAL 929123 726262
ANNUAL MEAN 2539 1990 1732
HIGHEST ANNUAL MEAN 2751 1973
LOWEST ANNUAL MEAN 832 1965
HIGHEST DAILY MEAN 24300 Jan 20 14900 Dec 2 41600 Mar 19 1936
LOWEST DAILY MEAN 282 Sep 23 324 Aug 10 24 Sep 7 1968
ANNUAL SEVEN-DAY MINIMUM 326 Sep 2 426 Jul 31 54 Aug 5 1964
INSTANTANEOUS PEAK FLOW 20700 Dec 2 45300 Mar 19 1936
INSTANTANEOUS PEAK STAGE 13.64 Dec 2 24.54 Mar 19 1936
10 PERCENT EXCEEDS 5900 4060 4000
50 PERCENT EXCEEDS 1590 1400 1000
90 PERCENT EXCEEDS 519 516 354
e Estimated.
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