CONNECTICUT RIVER BASIN

                                      01152500  SUGAR RIVER AT WEST CLAREMONT, NH

LOCATION.--Lat 43°23'15", long 72°21'45", Sullivan County, Hydrologic Unit 01080104, on right bank, 0.2 mi downstream 
    from Redwater Brook at West Claremont, and 2.4 mi upstream from mouth.
DRAINAGE AREA.--269 mi².
PERIOD OF RECORD.--Discharge records:  May 1928 to current year.  Published as "at Claremont" prior to October 1928. 
    Water-quality records:  Water year 1954, 1995-96
REVISED RECORDS.--WSP 711:  1930(M).  WSP 756:  Drainage area.  WSP 1901:  1960 (adjusted figures only).
GAGE.--Water-stage recorder.  Datum of gage is 358.78 ft above sea level (levels by U.S. Army Corps of Engineers).  
    Prior to October 1, 1928, nonrecording gage at site 0.8 mi upstream at different datum.
REMARKS.--Records good except those for estimated daily discharges, which are fair.  Regulation by Sunapee Lake 25 mi 
    upstream (Reservoirs in Connecticut River Basin) and occasional diurnal fluctuation at low flow by mills upstream; 
    greater regulation by mills prior to 1971. 
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 14,000 ft³/s, March 19, 1936, gage height, 10.92 ft, from rating 
    curve extended above 6,700 ft³/s on basis of computations of flow over dam at gage heights 10.49 ft and 10.93 ft; 
    maximum gage height, 11.80 ft, March 12, 1936 (ice jam); minimum daily discharge, 14 ft³/s, August 26, 1965.
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 3,000 ft³/s and maximum (*):
                           Discharge        Gage height                                   Discharge        Gage height
  Date         Time         (ft³/s)            (ft)              Date         Time         (ft³/s)            (ft)  
 Oct. 21       1845          5,520             6.90              Feb. 22       2400          4,820             6.48  
 Dec.  2       1645          4,230             6.06              Apr. 19       1545        * 5,730           * 7.02
 Dec. 25       0730          3,130             5.21
 Minimum daily discharge, 35 ft³/s, August 11, 20.

                       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        79      407      634      926     e330     1010     1270     1170      236       40       46       84
   2        62      378     3160      876     e325      812     1030     1200      295       40       43       73
   3        52      354     2580      806     e325      880      831     1090      248       64       41       82
   4        46      332     1640      727     e320      678      999     1350      214      128       41       76
   5        42      325     1220      712     e320      546     1290     1170      188       92       46       65
 
   6        40      314      980      822     e310     e570     1690      967      165       70       42       62
   7        41      310      830      714     e310     e530     2310     1230      150       61       39       55
   8        42      335      769      578     e300     e480     2350      968      139       55       41       54
   9       113     1650     e680      529     e290     e430     1520      881      127       63       37       52
  10       196     1920     e650     e540     e290     e400     1110      857      118      101       36       48
 
  11       266     1280      632      513     e280     e385      968      762      108       97       35       47
  12       197      962      632      516     e270     e365      884      659      104       78       36       54
  13       144      727      728      481     e260     e330     1120      575      125       65       52       52
  14       116      590      704     e450     e250     e380     1210      515      109       59       71       51
  15       129      500      701      467     e250     e380     1090      484       96       70       50       48
 
  16       115      436      728      460     e245     e360     1040      452       88      101       48       51
  17       107      411      784     e460     e270      345     1120      416       77      153       44       55
  18        98      400     1330     e455     e320      354     1910      382       78      161       46       54
  19        95      400     1510     e450      496      346     5190      398      127      171       36       51
  20       491      411     1380     e440      904      337     3730      562      130      134       35       50
 
  21      4270      398     e900     e435      862      318     2560      485      107      119       60       45
  22      3270      382     e800     e420    e1900      316     2130      424       87      110       63       43
  23      1880      360     e720     e480    e2800      301     1880      381       75      100       59       42
  24      1330      345      831     e500    e1300      291     1650      343       67       95       51       42
  25       968      330     2610     e460     1050      287     1440      323       62       89       46       41
 
  26       706      575     1540     e440      837      493     1270      308       58       82       44       42
  27       562      812     1210     e400      983      645     1160      280       54       81       50       42
  28       485      568      977     e380     1560      704     1300      227       52       75       75       39
  29       456      512     1020     e360      ---     e930     1540      218       48       43       96       56
  30       422      452     1530     e340      ---     1320     1300      197       44       43      118       49
  31       440      ---     1110     e340      ---     1610      ---      194      ---       46      104      ---
 
 TOTAL   17260    17176    35520    16477    17957    17133    48892    19468     3576     2686     1631     1605
 MEAN      557      573     1146      532      641      553     1630      628      119     86.6     52.6     53.5
 MAX      4270     1920     3160      926     2800     1610     5190     1350      295      171      118       84
 MIN        40      310      632      340      245      287      831      194       44       40       35       39
 
 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1928 - 1997, BY WATER YEAR (WY)
 
 MEAN      217      350      366      320      330      667     1292      652      310      174      137      129
 MAX       895      917     1146     1090     1343     2490     2746     1657      818      711      952     1269
 (WY)     1976     1996     1997     1978     1981     1936     1969     1940     1940     1973     1990     1938
 MIN      39.2     66.9     92.9     84.7     74.5      108      359      179     67.5     26.2     29.4     44.7
 (WY)     1984     1972     1948     1948     1942     1940     1995     1965     1965     1965     1965     1995
 
 SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1928 - 1997
 
 ANNUAL TOTAL                      244653                     199381                                             
 ANNUAL MEAN                          668                        546                        411                  
 HIGHEST ANNUAL MEAN                                                                        660              1976
 LOWEST ANNUAL MEAN                                                                         139              1965
 HIGHEST DAILY MEAN                  4660     Apr 17            5190     Apr 19           11200       Mar 19 1936
 LOWEST DAILY MEAN                     35     Sep 16            a 35     Aug 11              14       Aug 26 1965
 ANNUAL SEVEN-DAY MINIMUM              37     Sep 11              38     Aug  6              21       Aug 22 1965
 INSTANTANEOUS PEAK FLOW                                        5730     Apr 19         b 14000       Mar 19 1936
 INSTANTANEOUS PEAK STAGE                                          7.02  Apr 19            c 11.80    Mar 12 1936
 10 PERCENT EXCEEDS                  1660                       1300                        986                  
 50 PERCENT EXCEEDS                   380                        345                        209                  
 90 PERCENT EXCEEDS                    53                         46                         69                  

   a  Also occurred on August 20.
   b  From rating curve extended above 6,700 ft³/s as explained above.
   c  Ice jam.
   e  Estimated.

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