MERRIMACK RIVER BASIN

                                01080000 LAKE WINNIPESAUKEE AT WEIRS BEACH, NH

LOCATION.--Lat 43°36'27", long 71°27'32, Belknap County, Hydrologic Unit 01070002, 600 ft east of Weirs Beach Post 
    Office, 1,600 ft north of US Highway 3 bridge at Weirs Beach, 5.3 mi north of Laconia Post Office (Revised).
DRAINAGE AREA.--363 mi², at outlet at Lakeport.
PERIOD OF RECORD.--Gage heights:  September 1933 to current year.  Prior to November 1937, monthend contents only, 
    published in WSP 1301.  Prior to October 1970, published as "at The Weirs."
REVISED RECORDS.--WDR NH-VT-78-1:  1938-77 (datum correction).
GAGE.--Water-stage recorder.  Datum of gage is 499.92 ft above sea level.  Prior to November 1937, nonrecording gage at 
    lake outlet at Lakeport at datum 0.63 ft, corrected, higher.  November 24, 1937 to November 7, 1965, water-stage 
    recorder at site 500 ft southeast at present datum.
REMARKS.--Lake used for recreation and conservation for development of water power.  Usable capacity, 7.22 billion ft³ 
    between elevations 500.57 ft and 504.24 ft above sea level.  Stage regulated at outlet and by Wentworth, 
    Merrymeeting (Reservoirs in Merrimack River basin), and other lakes.  Contents given herein are computed from gage 
    height at 2400 on last day of month.  Estimated records are good.

                                     Capacity table (gage height, in feet, and
                            contents, in millions of cubic feet), furnished by State of New 
                                   Hampshire, Department of Environmental Services
                                                 2.0        13,880
                                                 3.0        15,840
                                                 4.0        17,840
                                                 5.0        19,850

EXTREMES FOR PERIOD OF RECORD.--Maximum daily gage height, 5.94 ft, June 4, 1984; minimum daily gage height, 0.63 ft, 
    December 11, 1941.
EXTREMES FOR CURRENT YEAR.--Maximum daily gage height, 4.43 ft, July 16; minimum daily gage height, 2.53 ft, 
    March 25.

                             GAGE HEIGHT, FEET, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997

                                                  DAILY MEAN VALUES
 
 DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
   1      2.91     3.70     3.16     4.02     3.29     2.81     2.72     4.15     4.32     4.11     3.88     3.62
   2      2.90     3.68     3.32     4.01     3.26     2.80     2.74     4.11     4.35     4.10     3.85     3.60
   3      2.85     3.64     3.45     4.01     3.23     2.80     2.77     4.13     4.35     4.12     3.83     3.55
   4      2.82     3.64     3.49     3.99     3.21     2.79     2.80     4.10     4.33     4.11     3.82     3.52
   5      2.80     3.62     3.51     3.97     3.25     2.79     2.85     4.09     4.31     4.07     3.77     3.50
 
   6      2.78     3.59     3.53     3.94     3.23     2.82     2.92     4.09     4.30     4.07     3.74     3.48
   7      2.77     3.58     3.55     3.91     3.20     2.82     3.00     4.06     4.28     4.06     3.71     3.47
   8      2.77     3.59     3.65     3.83     3.18     2.81     3.08     4.07     4.27     4.05     3.68     3.49
   9      2.82     3.62     3.67     3.85     3.14     2.81     3.13     4.08     4.25     4.06     3.67     3.48
  10      2.83     3.62     3.67     3.87     3.11     2.81     3.16     4.09     4.23     4.12     3.65     3.46
 
  11      2.81     3.59     3.67     3.83     3.09     2.79     3.20     4.09     4.22     4.10     3.63     3.45
  12      2.80     3.56     3.68     3.77     3.06     2.77     3.22     4.09     4.23     4.08     3.63     3.45
  13      2.78     3.54     3.69     3.73     3.01     2.74     3.29     4.09     4.23     4.07     3.66     3.45
  14      2.73     3.51     3.68     3.71     3.00     2.75     3.32     4.08     4.19     4.06     3.66     3.44
  15      2.68     3.48     3.68     3.69     2.99     2.77     3.34     4.10     4.18     4.39     3.65     3.41
 
  16      2.70     3.44     3.68     3.69     2.96     2.75     3.37     4.16     4.17     4.43     3.63     3.39
  17      2.69     3.42     3.71     3.66     2.94     2.73     3.40     4.19     4.15     4.42     3.61     3.38
  18      2.70     3.39     3.76     3.65     2.90     2.70     3.52     4.22     4.17     4.42     3.58     3.35
  19      2.71     3.37     3.80     3.60     2.87     2.67     3.84     4.24     4.25     4.36     3.56     3.34
  20      2.78     3.32     3.82     3.56     2.84     2.64     4.00     4.26     4.26     4.31     3.54     3.31
 
  21      3.22     3.27     3.85     3.52     2.82     2.62     4.09     4.25     4.25     4.30     3.57     3.27
  22      3.51     3.22     3.85     3.49     2.81     2.61     4.13     4.24     4.23     4.28     3.58     3.25
  23      3.62     3.19     3.85     3.44     2.82     2.58     4.15     4.25     4.22     4.25     3.56     3.22
  24      3.70     3.15     3.88     3.40     2.81     2.55     4.15     4.26     4.21     4.22     3.54     3.19
  25      3.74     3.14     3.97     3.43     2.79     2.53     4.14     4.27     4.20    e4.18     3.53     3.18
 
  26      3.75     3.19     4.03     3.40     2.77     2.55     4.13     4.26     4.18    e4.13     3.51     3.15
  27      3.76     3.18     4.03     3.38     2.79     2.55     4.12     4.27     4.14    e4.10     3.51     3.14
  28      3.74     3.18     4.03     3.39     2.81     2.55     4.15     4.26     4.14     4.04     3.53     3.14
  29      3.72     3.14     4.04     3.36      ---     2.55     4.15     4.26     4.13     3.97     3.61     3.14
  30      3.73     3.13     4.03     3.33      ---     2.58     4.16     4.25     4.12     3.93     3.61     3.12
  31      3.71      ---     4.04     3.30      ---     2.66      ---     4.26      ---     3.91     3.61      ---
 
 MEAN     3.09     3.42     3.73     3.67     3.01     2.70     3.50     4.17     4.23     4.16     3.64     3.36
 MAX      3.76     3.70     4.04     4.02     3.29     2.82     4.16     4.27     4.35     4.43     3.88     3.62
 MIN      2.68     3.13     3.16     3.30     2.77     2.53     2.72     4.06     4.12     3.91     3.51     3.12
 
 (|)     17,260   16,060   17,860   16,460   15,470   15,230   18,140   18,360   18,060   17,640   17,060   16,080
 ()      +601     -463     +672     -523     -409     -90     +1,120     +82     -116     -157     -216     -378

 CAL YR 1996   MEAN 3.73  MAX 4.94  MIN 2.68  () +54
 WTR YR 1997   MEAN 3.56  MAX 4.43  MIN 2.53  () +14
 
 (|) Millions of cubic feet at 2400 on last day of month.
 () Change in contents equivalent in cubic feet per second.
   e  Estimated.

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