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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