CONNECTICUT RIVER BASIN
01135500 PASSUMPSIC RIVER AT PASSUMPSIC, VT
LOCATION.--Lat 44°21'56", long 72°02'23", Caledonia County, Hydrologic Unit 01080102, on right bank, 0.7 mi upstream
from Water Andric, l mi downstream from dam and village of Passumpsic, and 4 mi upstream from mouth.
DRAINAGE AREA.--436 mi².
PERIOD OF RECORD.--Discharge records: October 1928 to current year. Monthly discharge only October 1928,
published in WSP 1301.
Water-quality records: Water years 1953, 1967-74 (partial- record station), 1994.
REVISED RECORDS.--WSP 781: 1933(M). WSP 871: Drainage area. WSP 1231: 1929, 1930-31(M).
GAGE.--Water-stage recorder. Elevation of gage is 490 ft above sea level, from topographic map.
REMARKS.--Records good except for those estimated daily discharges, which are fair. Low flow regulated by powerplants
upstream.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage since at least 1780, about 31.5 ft in November 1927, from information
by local residents (discharge not determined).
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 5,000 ft³/s and maximum (*):
Discharge Gage height Discharge Gage height
Date Time (ft³/s) (ft) Date Time (ft³/s) (ft)
Dec. 2 1845 7,350 11.86 July 15 1545 * 8,610 * 13.28
Apr. 7 2200 5,320 9.59
Minimum daily discharge, 187 ft³/s, August 7.
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
1 401 690 505 e850 e325 e950 1800 2280 821 247 249 703
2 299 554 5080 e830 e320 e1050 1270 3610 861 255 221 666
3 255 510 4390 e790 e320 e1500 1130 2640 675 369 293 593
4 353 463 1960 e750 e315 e1200 1170 2430 576 1040 309 533
5 250 453 1310 e740 e315 e980 1340 1950 537 676 236 467
6 241 475 1080 1200 e315 e830 2430 1650 464 394 238 404
7 240 490 941 1070 e310 e675 4150 3220 446 333 187 387
8 210 512 904 e775 e310 e630 4300 2330 424 362 201 357
9 447 1520 828 e700 e305 e630 2540 1970 392 727 339 346
10 678 2240 840 e650 e310 e640 1700 2140 365 1390 238 309
11 891 1270 743 e580 e295 e620 1450 2160 333 640 220 306
12 568 920 725 e545 e290 e580 1400 1670 355 408 374 368
13 431 748 710 e530 e285 528 1370 1650 517 331 1010 358
14 372 600 710 e510 e280 470 1440 1450 802 748 2430 365
15 327 522 707 e500 e275 e540 1370 1310 557 5780 900 321
16 307 537 717 e485 e270 e510 1540 1470 389 3670 604 296
17 283 611 749 e475 e265 e460 2110 1690 373 1580 809 277
18 267 531 1250 e450 e275 e460 2630 1450 531 1030 764 287
19 250 547 1370 e425 e340 e450 3080 1330 1290 819 460 280
20 248 553 1120 e400 e500 e450 3440 1260 993 729 347 276
21 1790 519 e840 e390 e860 e450 3190 1110 583 587 377 480
22 3100 482 e835 e385 e1300 e445 3000 1300 1020 490 2520 382
23 1870 449 e795 e410 e2100 e440 2890 1350 1280 422 1560 309
24 1190 392 1010 e405 e1400 e415 2770 1150 690 389 998 340
25 943 398 2020 e395 e1000 e400 2340 1020 480 354 703 299
26 712 407 1230 e385 e800 e500 2280 978 719 326 547 302
27 590 492 1100 e375 e900 769 2340 899 549 308 519 282
28 535 582 939 e360 e1050 705 2790 813 407 310 2060 272
29 507 592 941 e345 --- 1110 3200 727 335 359 1390 330
30 501 398 1110 e330 --- 2180 2280 692 283 301 915 731
31 742 --- e860 e325 --- 2290 --- 750 --- 267 686 ---
TOTAL 19798 19457 38319 17360 15630 23857 68740 50449 18047 25641 22704 11626
MEAN 639 649 1236 560 558 770 2291 1627 602 827 732 388
MAX 3100 2240 5080 1200 2100 2290 4300 3610 1290 5780 2520 731
MIN 210 392 505 325 265 400 1130 692 283 247 187 272
CFSM 1.46 1.49 2.84 1.28 1.28 1.77 5.26 3.73 1.38 1.90 1.68 .89
IN. 1.69 1.66 3.27 1.48 1.33 2.04 5.86 4.30 1.54 2.19 1.94 .99
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1929 - 1997, BY WATER YEAR (WY)
MEAN 528 705 601 484 419 928 2269 1359 644 401 340 346
MAX 1522 1667 1919 1255 2280 4013 3931 3082 1846 1519 963 1126
(WY) 1946 1960 1974 1978 1981 1936 1934 1972 1973 1973 1990 1954
MIN 132 253 169 128 123 161 806 517 225 138 122 98.8
(WY) 1948 1948 1948 1948 1980 1940 1995 1941 1988 1955 1934 1948
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1929 - 1997
ANNUAL TOTAL 380209 331628
ANNUAL MEAN 1039 909 751
HIGHEST ANNUAL MEAN 1153 1974
LOWEST ANNUAL MEAN 472 1965
HIGHEST DAILY MEAN 7670 Apr 27 5780 Jul 15 15400 Mar 18 1936
LOWEST DAILY MEAN 109 Sep 20 187 Aug 7 13 Sep 12 1948
ANNUAL SEVEN-DAY MINIMUM 146 Sep 19 237 Aug 5 75 Aug 22 1949
INSTANTANEOUS PEAK FLOW 8610 Jul 15 18200 Jul 1 1973
INSTANTANEOUS PEAK STAGE 13.28 Jul 15 23.49 Jul 1 1973
ANNUAL RUNOFF (CFSM) 2.38 2.08 1.72
ANNUAL RUNOFF (INCHES) 32.44 28.29 23.41
10 PERCENT EXCEEDS 2230 2100 1700
50 PERCENT EXCEEDS 689 592 423
90 PERCENT EXCEEDS 271 296 166
e Estimated.
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