CONNECTICUT RIVER BASIN 01184100 STONY BROOK NEAR WEST SUFFIELD, CT LOCATION.--Lat 41×57'38", long 72×42'39", Hartford County, Hydrologic Unit 01080205, on right bank at upstream side of bridge on South Grand Street, 2.1 mi south of West Suffield. DRAINAGE AREA.--10.4 mi2. PERIOD OF RECORD.--Annual maximum, water years 1960-81. May 1981 to current year. REVISED RECORDS.--WDR CT-83-1: Drainage area. GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 149.21 ft above sea level. REMARKS.--Records good except those for periods with ice effect, which are poor. EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 17,300 ft3/s on basis of slope-area measurement, at site 5.6 mi downstream, just below State Route 75, drainage area = 36.9 mi2, Aug. 19, 1955. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 1.5 2.7 6.2 e3.8 10 121 19 6.0 2.8 .75 .17 .32 2 1.3 3.0 5.2 e3.6 41 69 17 5.3 3.2 .76 .09 .35 3 1.2 3.2 4.5 e32 165 34 16 5.3 2.6 .81 .18 .35 4 .98 3.2 4.0 27 74 159 15 8.5 2.2 .83 .22 .27 5 .85 3.0 3.8 e12 52 90 15 19 1.8 .56 .26 .19 6 .88 2.8 3.4 e9.5 34 e34 13 15 1.4 .46 .25 .67 7 .92 2.5 3.6 e7.5 25 e27 13 11 1.4 1.3 .18 1.0 8 3.0 2.3 3.6 e6.5 22 e26 13 9.3 1.3 .76 .14 2.8 9 11 2.0 4.9 e34 19 24 11 9.9 1.2 .68 .15 2.2 10 18 2.2 4.5 e27 20 e23 12 7.7 1.3 .70 .16 24 11 15 7.6 6.4 e11 22 e22 10 6.1 1.3 .46 .22 39 12 8.0 9.0 3.9 e8.0 25 e22 13 5.2 1.3 .36 .25 9.8 13 5.2 5.9 3.2 e6.0 45 22 11 4.5 1.2 .43 .22 3.7 14 45 4.4 3.0 5.3 e23 24 10 3.8 1.3 .43 .67 3.1 15 103 3.9 3.1 9.9 e17 32 8.9 3.5 1.4 .45 2.0 4.2 16 26 3.4 3.3 14 15 36 9.1 3.0 1.1 .47 .97 190 17 11 4.7 3.5 12 e17 40 14 3.0 1.1 .45 .91 556 18 7.4 6.2 4.6 18 38 34 12 3.2 1.1 .25 .60 103 19 5.8 4.6 4.0 55 64 25 11 5.0 1.1 1.1 .47 35 20 4.7 4.3 3.6 44 34 19 9.8 40 .86 .96 .41 20 21 4.1 5.5 3.6 29 e22 17 9.1 16 .73 .63 .87 17 22 3.7 4.8 5.7 29 e15 136 9.3 7.4 .79 .55 .70 24 23 3.4 3.9 6.4 39 e13 99 16 5.7 .78 .50 .53 18 24 3.2 3.9 4.7 138 11 42 18 21 .76 .43 .58 12 25 3.0 3.4 4.1 e95 11 34 12 42 .70 .28 .54 9.1 26 3.3 13 e3.9 e28 12 26 10 16 .66 .20 .52 7.1 27 4.0 35 e3.8 e21 14 24 8.7 10 .44 .31 .53 6.4 28 3.9 15 e3.6 e17 22 37 7.4 7.7 .41 .33 .43 6.4 29 5.4 8.7 e3.4 e13 --- 42 6.9 5.9 .61 .37 .30 5.9 30 4.9 7.5 4.0 e11 --- 29 6.4 4.0 .64 .36 .19 15 31 3.8 --- e4.1 e9.5 --- 21 --- 3.1 --- .28 .27 --- TOTAL 313.43 181.6 129.6 775.6 882 1390 356.6 313.1 37.48 17.21 13.98 1116.85 MEAN 10.1 6.05 4.18 25.0 31.5 44.8 11.9 10.1 1.25 .56 .45 37.2 MAX 103 35 6.4 138 165 159 19 42 3.2 1.3 2.0 556 MIN .85 2.0 3.0 3.6 10 17 6.4 3.0 .41 .20 .09 .19 CFSM .97 .58 .40 2.41 3.03 4.31 1.14 .97 .12 .05 .04 3.58 IN. 1.12 .65 .46 2.77 3.15 4.97 1.28 1.12 .13 .06 .05 3.99 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1981 - 1999, BY WATER YEAR (WY) MEAN 13.0 19.5 22.9 24.4 26.4 40.1 35.4 24.2 18.3 5.41 5.92 7.31 MAX 44.2 36.5 57.9 60.3 59.6 80.4 92.6 73.9 97.5 12.5 17.3 37.2 (WY) 1990 1996 1997 1996 1984 1983 1983 1989 1982 1998 1990 1999 MIN 2.37 5.98 4.18 3.93 9.01 12.8 8.13 5.79 1.25 .56 .41 .48 (WY) 1998 1985 1999 1985 1985 1985 1985 1986 1999 1999 1993 1983 e Estimated. CONNECTICUT RIVER BASIN 01184100 STONY BROOK NEAR WEST SUFFIELD, CT—Continued SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1981 - 1999 ANNUAL TOTAL 7361.55 5527.45 ANNUAL MEAN 20.2 15.1 20.3 HIGHEST ANNUAL MEAN 29.9 1984 LOWEST ANNUAL MEAN 7.42 1985 HIGHEST DAILY MEAN 265 May 11 556 Sep 17 910 Jun 6 1982 LOWEST DAILY MEAN .47 Sep 14 .09 Aug 2 .08 Sep 4 1995 ANNUAL SEVEN-DAY MINIMUM .75 Sep 9 .19 Aug 2 .13 Sep 2 1995 INSTANTANEOUS PEAK FLOW 1130 Sep 17 1280 Jun 6 1982 INSTANTANEOUS PEAK STAGE 5.45 Sep 17 5.83 Jun 6 1982 INSTANTANEOUS LOW FLOW .08 Aug 2 .07 Sep 3 1995 ANNUAL RUNOFF (CFSM) 1.94 1.46 1.95 ANNUAL RUNOFF (INCHES) 26.33 19.77 26.53 10 PERCENT EXCEEDS 47 34 46 50 PERCENT EXCEEDS 9.0 5.2 9.5 90 PERCENT EXCEEDS 1.2 .44 1.2