ST. LAWRENCE RIVER BASIN
04282500 OTTER CREEK AT MIDDLEBURY, VT
LOCATION.--Lat 44°00'47", long 73°10'06", Addison County, Hydrologic Unit 02010002, on right bank, 150 ft upstream from
highway bridge in Middlebury and 3.5 mi downstream from Middlebury River.
DRAINAGE AREA.--628 mi².
PERIOD OF RECORD.--Discharge records: April 1903 to April 1907, October 1910 to January 1920, October 1928 to
current year.
Water-quality records: Water years 1954, 1967-74.
REVISED RECORDS.--WSP 434: 1903-04. WSP 684: 1913(M), drainage area. WSP 1114: 1913. WSP 1207: 1929, 1931.
GAGE.--Water-stage recorder. Datum of gage is 335.75 ft above sea level. Nonrecording gage at site 1,800 ft upstream
at datum 10 ft lower, April 1, 1903, to April 30, 1907, and October 5, 1910, to January 31, 1920, nonrecording gage
at present site and datum, October 1, 1928, to October 17, 1933.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Some regulation by Chittenden
Reservoir, usable capacity, 819 billion ft³ on East Creek.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge since at least 1830, 13,600 ft³/s, November 4, 1927, gage height,
13.3 ft, present datum.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 3,360 ft³/s, December 8, gage height, 4.97 ft; minimum daily discharge,
168 ft³/s, August 4.
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
1 645 997 1020 e1800 e586 2160 2700 2280 740 271 226 327
2 469 927 2900 e1690 e580 e2400 2800 2540 885 276 187 273
3 401 783 2890 1700 e580 e2500 2940 2500 933 334 170 293
4 361 703 2820 1630 e585 e2450 3060 2570 852 576 168 369
5 287 681 2900 1650 e580 2480 3140 2530 735 461 200 332
6 255 638 3080 1830 e575 2390 3240 2610 646 370 279 262
7 246 613 3250 1810 e555 2250 3330 2950 580 312 252 232
8 282 622 3350 1760 e540 2070 3250 2830 517 290 190 239
9 369 1200 3310 1540 e525 e1700 3140 2800 493 336 171 232
10 657 1650 3180 e1150 e520 1550 3130 2840 475 407 231 230
11 914 1670 3000 e1060 e510 1370 3170 2850 471 376 273 233
12 868 1610 2790 e1000 e510 1200 3160 2790 435 326 293 221
13 660 1430 2610 e920 e480 e900 3110 2720 449 273 281 237
14 535 1230 2430 e910 e470 e750 2960 2620 469 240 469 268
15 519 1040 2270 e880 e470 e690 2810 2500 423 247 408 298
16 504 864 2110 e870 e470 e680 2670 2370 367 344 271 267
17 474 687 1980 e840 e480 e660 2530 2230 352 374 225 261
18 496 666 1960 e820 e490 e640 2410 2090 425 359 206 262
19 476 771 1910 e800 570 e620 2340 1940 736 421 191 244
20 410 836 1920 e780 904 e600 2310 1790 1080 372 197 233
21 1460 852 1900 e740 1210 e570 2320 1630 916 328 210 240
22 1940 791 1820 e730 1680 e560 2320 1490 659 314 252 241
23 2060 684 1660 e720 1830 e560 2290 1410 525 311 269 227
24 2130 584 1780 e710 1810 e570 2270 1330 472 267 332 250
25 2130 560 2140 e690 1880 e600 2260 1210 453 219 279 255
26 2060 591 2060 e680 1860 746 2240 1090 407 202 232 240
27 1910 839 2130 e670 1940 1160 2220 1020 356 193 232 223
28 1650 915 2210 e650 2110 1590 2230 939 325 191 316 233
29 1370 738 2280 e630 --- 2120 2220 860 302 193 614 283
30 1150 816 2300 e620 --- 2570 2210 763 282 208 567 488
31 1050 --- 2190 e580 --- 2690 --- 716 --- 229 428 ---
TOTAL 28738 26988 74150 32860 25300 43796 80780 62808 16760 9620 8619 7993
MEAN 927 900 2392 1060 904 1413 2693 2026 559 310 278 266
MAX 2130 1670 3350 1830 2110 2690 3330 2950 1080 576 614 488
MIN 246 560 1020 580 470 560 2210 716 282 191 168 221
CFSM 1.48 1.43 3.81 1.69 1.44 2.25 4.29 3.23 .89 .49 .44 .42
IN. 1.70 1.60 4.39 1.95 1.50 2.59 4.79 3.72 .99 .57 .51 .47
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1903-07, 10-20, 28-97, BY WATER YEAR (WY)
MEAN 643 871 919 865 851 1509 2545 1538 815 534 456 479
MAX 2021 1897 2610 2509 2414 4538 4500 3717 3025 1833 2624 2411
(WY) 1988 1976 1984 1949 1981 1936 1960 1996 1947 1996 1976 1938
MIN 172 260 246 205 229 384 885 370 208 126 129 168
(WY) 1965 1965 1948 1948 1980 1940 1995 1903 1965 1965 1965 1982
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1903-07, 10-20, 28-97
ANNUAL TOTAL 565709 418412
ANNUAL MEAN 1546 1146 1000
HIGHEST ANNUAL MEAN 1878 1976
LOWEST ANNUAL MEAN 397 1965
HIGHEST DAILY MEAN 5540 Apr 27 3350 Dec 8 11000 Mar 21 1936
LOWEST DAILY MEAN 230 Sep 22 168 Aug 4 92 Aug 9 1965
ANNUAL SEVEN-DAY MINIMUM 262 Sep 18 197 Jul 29 107 Jul 28 1965
INSTANTANEOUS PEAK FLOW 3360 Dec 8 11000 Mar 20 1936
INSTANTANEOUS PEAK STAGE 4.97 Dec 8 10.30 Mar 20 1936
INSTANTANEOUS LOW FLOW a 166 Aug 4
ANNUAL RUNOFF (CFSM) 2.46 1.83 1.59
ANNUAL RUNOFF (INCHES) 33.51 24.78 21.64
10 PERCENT EXCEEDS 3570 2610 2320
50 PERCENT EXCEEDS 1050 720 630
90 PERCENT EXCEEDS 385 241 260
a Also occurred on August 5 and 9.
e Estimated.
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