ST. LAWRENCE RIVER BASIN
04293000 MISSISQUOI RIVER NEAR NORTH TROY, VT
LOCATION.--Lat 44°58'22", long 72°23'15", Orleans County, Hydrologic Unit 02010007, on right bank, 200 ft upstream from
Big Falls, 1.5 mi downstream from Jay Branch, and 2.2 mi upstream from North Troy.
DRAINAGE AREA.--131 mi².
PERIOD OF RECORD.--Discharge records: August 1931 to current year.
REVISED RECORDS.--WSP 924: 1940. WSP 1114: 1933(M), 1936- 39.
GAGE.--Water-stage recorder. Elevation of gage is 580 ft above sea level, from topographic map.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Occasional regulation at low flow
caused by small powerplant upstream; greater regulation prior to 1967.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 8,940 ft³/s, July 15, 1997, gage height, 13.84 ft; minimum,
9.4 ft³/s, August 28, 1949.
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 3,300 ft³/s and maximum (*):
Discharge Gage height Discharge Gage height
Date Time (ft³/s) (ft) Date Time (ft³/s) (ft)
Dec. 2 1530 6,770 11.83 July 15 1400 * 8,940 * 13.84
Minimum discharge, 44 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
1 102 191 350 e160 e87 422 638 1170 248 53 59 149
2 73 155 5200 e145 e86 1260 476 1430 217 50 57 148
3 79 142 1740 e138 e84 1330 443 766 179 115 108 228
4 83 130 609 e130 e82 611 619 802 157 382 82 144
5 68 138 415 e190 e80 406 771 577 136 267 66 115
6 61 178 324 e395 e79 309 1760 627 128 129 62 97
7 57 175 270 e240 e77 e250 2850 1450 116 84 57 98
8 55 173 243 e160 e75 e225 1910 732 110 67 53 104
9 86 1360 268 e148 e73 e195 704 627 107 185 50 87
10 131 1420 233 e135 e70 e175 474 687 80 219 47 78
11 177 482 217 e130 e69 e162 409 630 77 111 62 75
12 115 311 206 e125 e68 e152 410 665 74 79 168 84
13 99 236 204 e120 e67 e140 571 758 82 69 328 191
14 82 185 225 e113 e66 e130 630 543 172 185 719 133
15 72 142 241 e110 e66 e123 479 447 124 6510 192 102
16 68 121 247 e108 e62 e120 576 471 91 1880 194 86
17 65 142 324 e105 e60 e117 1010 495 82 467 477 78
18 61 153 822 e103 e66 e112 1230 489 97 410 260 77
19 59 193 587 e102 e72 e110 881 421 162 249 136 73
20 61 237 371 e100 e650 e105 988 454 134 224 100 156
21 1010 190 262 e110 e600 e103 1040 418 102 163 281 344
22 1670 162 248 e120 e1450 e100 1050 974 207 133 1400 164
23 774 144 238 e195 e1360 e100 1090 950 160 113 768 152
24 455 118 454 e150 730 e95 1020 531 100 101 430 207
25 326 125 1210 e130 391 e90 856 415 87 88 239 142
26 220 125 413 e120 348 e120 856 504 101 80 159 115
27 170 126 322 e115 364 e160 940 362 81 76 129 115
28 181 121 288 e105 522 e250 1470 293 69 77 202 102
29 159 123 523 e98 --- e550 1730 254 61 81 169 158
30 148 123 723 e91 --- e1520 1010 230 56 71 139 490
31 253 --- 235 e89 --- 1040 --- 306 --- 64 118 ---
TOTAL 7020 7621 18012 4280 7804 10582 28891 19478 3597 12782 7311 4292
MEAN 226 254 581 138 279 341 963 628 120 412 236 143
MAX 1670 1420 5200 395 1450 1520 2850 1450 248 6510 1400 490
MIN 55 118 204 89 60 90 409 230 56 50 47 73
CFSM 1.73 1.94 4.44 1.05 2.13 2.61 7.35 4.80 .92 3.15 1.80 1.09
IN. 1.99 2.16 5.11 1.22 2.22 3.00 8.20 5.53 1.02 3.63 2.08 1.22
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 1997, BY WATER YEAR (WY)
MEAN 219 285 229 160 141 365 878 422 184 117 111 132
MAX 653 630 585 448 796 1225 1522 991 626 412 454 421
(WY) 1946 1960 1974 1937 1981 1936 1933 1940 1978 1997 1976 1945
MIN 51.3 97.6 60.9 53.9 34.0 57.0 265 143 43.7 32.0 19.7 31.5
(WY) 1949 1979 1956 1940 1980 1941 1995 1977 1933 1934 1934 1953
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1931 - 1997
ANNUAL TOTAL 126298 131670
ANNUAL MEAN 345 361 270
HIGHEST ANNUAL MEAN 385 1974
LOWEST ANNUAL MEAN 168 1965
HIGHEST DAILY MEAN 5200 Dec 2 6510 Jul 15 6710 Apr 18 1982
LOWEST DAILY MEAN 30 Sep 24 47 Aug 10 11 Aug 28 1949
ANNUAL SEVEN-DAY MINIMUM 36 Sep 19 57 Aug 5 15 Aug 22 1934
INSTANTANEOUS PEAK FLOW 8940 Jul 15 8940 Jul 15 1997
INSTANTANEOUS PEAK STAGE 13.84 Jul 15 13.84 Jul 15 1997
INSTANTANEOUS LOW FLOW 44 Aug 11 9.4 Aug 28 1949
ANNUAL RUNOFF (CFSM) 2.63 2.75 2.06
ANNUAL RUNOFF (INCHES) 35.86 37.39 28.00
10 PERCENT EXCEEDS 768 866 631
50 PERCENT EXCEEDS 172 160 125
90 PERCENT EXCEEDS 57 72 46
e Estimated.
Back to station selections
Back to District Home Page
To WRD National Home Page
To USGS National Home Page
Comments and suggestions can be sent to
NH-VT Webmaster