ST. LAWRENCE RIVER BASIN
04292000 LAMOILLE RIVER AT JOHNSON, VT
LOCATION.--Lat 44°37'22", long 72°40'50", Lamoille County, Hydrologic Unit 02010003, on right bank, above falls, 0.7 mi
upstream from bridge in Johnson, and 0.8 mi upstream from Gihon River.
DRAINAGE AREA.--310 mi².
PERIOD OF RECORD.--Discharge records: July to December 1910, June 1911 to December 1913 (monthly discharge only,
January to March 1912, February 1913), September 1928 to current year.
Water-quality records: Water year 1953.
REVISED RECORDS.--WSP 894: Drainage area. WSP 1114: 1933, 1934(M). WSP 1237: 1912(M), 1930, 1932(M).
GAGE.--Water-stage recorder. Elevation of gage is 506.7 ft above sea level, by levels. Prior to
December 31, 1913, nonrecording gage at bridge 0.7 mi downstream at different datum.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Some regulation by powerplant
upstream.
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 5,400 ft³/s and maximum (*):
Discharge Gage height Discharge Gage height
Date Time (ft³/s) (ft) Date Time (ft³/s) (ft)
Dec. 2 1430 7,950 13.12 July 15 1730 * 12,900 * 16.46
Minimum daily discharge, 121 ft³/s, July 2 and August 5.
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
1 235 388 532 e475 e200 747 1430 1250 379 123 179 475
2 167 404 6160 e450 e195 863 1020 1820 413 121 168 574
3 164 402 e3250 e420 e195 1310 907 1300 376 209 155 447
4 163 385 e2000 e400 e190 916 939 1430 299 930 139 421
5 148 451 e1130 e490 e185 742 1100 1090 244 460 121 391
6 142 442 e860 e790 e180 676 2510 1100 169 315 211 304
7 143 407 e710 e620 e178 e570 3870 2340 171 191 160 255
8 194 438 e640 e440 e178 e510 3250 1520 173 144 146 241
9 315 1880 e600 e350 e175 e415 1530 1040 176 641 152 240
10 370 1740 e540 e390 e170 e375 1110 1250 165 937 150 280
11 414 939 513 e380 e165 e340 964 1290 157 451 151 223
12 308 666 489 e350 e160 e325 892 1160 138 225 159 436
13 281 672 490 e325 e152 e310 902 1060 139 199 515 230
14 251 490 532 e310 e150 e285 993 844 209 221 1670 206
15 242 434 565 e300 e150 e260 859 719 219 7450 628 212
16 212 343 586 e290 e153 e250 944 695 170 3920 451 206
17 196 344 656 e285 e160 e240 1130 831 156 1380 487 207
18 194 380 1090 e265 e180 e240 1590 797 181 1050 554 209
19 191 416 995 e255 e300 e235 1900 729 433 983 373 167
20 199 443 775 e240 e950 e235 1960 711 437 883 308 175
21 1920 391 572 e255 812 e230 1760 644 249 548 701 311
22 2960 391 544 e290 1970 e230 1790 748 245 443 1140 204
23 1650 321 536 e395 1920 e225 1740 703 541 367 1580 258
24 1040 e295 844 e295 1200 e220 1610 636 306 279 896 390
25 802 e260 1790 e255 774 e225 1450 554 200 194 577 326
26 620 e280 933 e240 696 e260 1490 513 223 178 504 315
27 534 e290 789 e240 637 e320 1390 418 192 188 361 199
28 456 e290 737 e230 800 e425 1720 315 167 276 992 166
29 386 e285 791 e225 --- e850 2180 318 161 256 720 266
30 342 292 1020 e220 --- 1960 1380 354 142 173 489 577
31 423 --- e520 e210 --- 1620 --- 371 --- 170 341 ---
TOTAL 15662 15159 32189 10680 13175 16409 46310 28550 7230 23905 15178 8911
MEAN 505 505 1038 345 471 529 1544 921 241 771 490 297
MAX 2960 1880 6160 790 1970 1960 3870 2340 541 7450 1670 577
MIN 142 260 489 210 150 220 859 315 138 121 121 166
CFSM 1.63 1.63 3.35 1.11 1.52 1.71 4.98 2.97 .78 2.49 1.58 .96
IN. 1.88 1.82 3.86 1.28 1.58 1.97 5.56 3.43 .87 2.87 1.82 1.07
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1912 - 1997, BY WATER YEAR (WY)
MEAN 400 510 461 370 339 712 1641 804 408 266 253 255
MAX 1481 1173 1390 959 1624 2711 2868 1903 1344 1028 843 655
(WY) 1991 1991 1991 1996 1981 1936 1933 1972 1973 1973 1990 1938
MIN 84.1 140 162 93.0 114 157 556 245 123 102 101 93.6
(WY) 1964 1954 1948 1948 1934 1940 1995 1965 1988 1991 1987 1978
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1912 - 1997
ANNUAL TOTAL 263067 233358
ANNUAL MEAN 719 639 535
HIGHEST ANNUAL MEAN 819 1973
LOWEST ANNUAL MEAN 305 1965
HIGHEST DAILY MEAN 6870 Jan 20 7450 Jul 15 13400 Aug 6 1995
LOWEST DAILY MEAN 65 Sep 22 a 121 Jul 2 16 Oct 26 1947
ANNUAL SEVEN-DAY MINIMUM 84 Sep 19 154 Aug 4 50 Aug 29 1934
INSTANTANEOUS PEAK FLOW 12900 Jul 15 19000 Aug 6 1995
INSTANTANEOUS PEAK STAGE 16.46 Jul 15 19.98 Aug 6 1995
ANNUAL RUNOFF (CFSM) 2.32 2.06 1.73
ANNUAL RUNOFF (INCHES) 31.57 28.00 23.46
10 PERCENT EXCEEDS 1640 1430 1180
50 PERCENT EXCEEDS 420 391 290
90 PERCENT EXCEEDS 158 169 134
a Also occurred on August 5.
e Estimated.
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