SURFACE-WATER RECORDS PAWCATUCK RIVER BASIN 01118300 PENDLETON HILL BROOK NEAR CLARKS FALLS, CT LOCATION.--Lat 41×28'29", long 71×50'05", New London County, Hydrologic Unit 01090005, on left bank just upstream from twin culverts on Grindstone Hill Road, 0.1 mi west of State Route 49 in the township of North Stonington, 1.6 mi northwest of Clarks Falls, and 3.4 mi northeast of village of North Stonington. DRAINAGE AREA.--4.02 mi2. PERIOD OF RECORD.--July l958 to current year. REVISED RECORDS.--WDR CT-85-1: 1982 (P). GAGE.--Water-stage recorder. Datum of gage is 152.90 ft above sea level. Satellite telemetry at station. REMARKS.--Records good except those for periods of estimated daily discharges, which are fair. 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 1.1 1.5 3.2 2.9 10 65 7.1 2.5 1.4 .44 .06 .04 2 .92 1.4 2.8 2.1 29 34 6.6 2.3 1.3 .48 .08 .03 3 .85 1.4 2.6 14 100 23 5.7 2.4 1.2 .46 .08 .03 4 .80 1.4 2.6 25 42 23 5.4 3.6 1.0 .43 .05 .03 5 .77 1.4 2.4 14 32 18 4.9 3.5 .97 .46 .04 .03 6 .73 1.3 2.2 9.6 24 19 4.6 3.2 .94 .37 .04 .04 7 .71 1.3 2.2 6.9 20 30 4.4 3.0 .91 .31 .03 .05 8 .76 1.3 2.1 6.2 e17 20 3.9 2.7 .83 .27 .38 .29 9 2.8 1.3 2.4 19 e15 16 4.0 3.0 .78 .26 .36 .31 10 9.2 1.2 2.1 22 e13 e14 4.2 2.3 .78 .26 .15 9.6 11 6.5 8.4 2.0 14 e12 e13 3.7 1.9 .74 .26 .11 13 12 4.1 8.5 2.0 e11 e11 e12 4.3 1.5 .74 .23 .16 2.3 13 2.7 5.3 1.9 e9.8 e10 e11 3.6 1.4 .77 .26 .13 .74 14 2.5 3.7 1.9 8.3 e9.4 11 3.2 1.3 .99 .30 .11 .50 15 3.6 2.9 1.7 34 8.8 14 2.9 1.2 .90 .27 .30 .52 16 2.3 2.4 1.7 38 8.0 15 3.4 1.2 .71 .24 .24 22 17 1.7 5.4 1.8 22 7.3 18 6.6 1.1 .68 .21 .16 21 18 1.4 9.2 2.2 21 14 19 4.4 1.1 .72 .17 .10 9.2 19 1.3 6.2 1.9 33 18 15 3.6 1.3 .66 .18 .08 3.5 20 1.2 4.9 2.0 22 13 12 3.3 6.1 .61 .23 .06 1.6 21 1.2 4.9 1.9 17 10 10 3.2 3.0 .73 .19 .06 1.1 22 1.1 3.8 2.1 17 7.7 19 3.0 1.9 1.1 .15 .07 1.1 23 1.1 3.2 2.0 15 5.7 16 5.3 7.2 1.3 .16 .07 .87 24 1.1 2.8 1.9 34 5.1 15 7.2 23 1.0 .23 .05 .73 25 1.1 2.4 1.6 41 e5.0 17 4.6 18 .55 .23 .04 .68 26 1.1 4.6 1.5 26 e4.9 13 3.8 12 .49 .20 .05 .63 27 1.1 7.1 1.5 20 e4.8 11 3.3 5.3 .45 .20 .21 .60 28 1.2 5.1 1.7 17 18 14 3.1 3.5 .43 .11 .15 .58 29 2.8 4.0 2.9 e14 --- 13 2.9 2.7 .44 .08 .09 .61 30 2.0 3.5 7.5 e12 --- 9.8 2.6 2.1 .46 .07 .06 2.2 31 1.6 --- 4.3 11 --- 7.6 --- 1.7 --- .06 .04 --- TOTAL 61.34 111.8 72.6 558.8 474.7 547.4 128.8 127.0 24.58 7.77 3.61 93.91 MEAN 1.98 3.73 2.34 18.0 17.0 17.7 4.29 4.10 .82 .25 .12 3.13 MAX 9.2 9.2 7.5 41 100 65 7.2 23 1.4 .48 .38 22 MIN .71 1.2 1.5 2.1 4.8 7.6 2.6 1.1 .43 .06 .03 .03 CFSM .49 .93 .58 4.48 4.22 4.39 1.07 1.02 .20 .06 .03 .78 IN. .57 1.03 .67 5.17 4.39 5.07 1.19 1.18 .23 .07 .03 .87 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1959 - 1999, BY WATER YEAR (WY) MEAN 3.75 8.01 12.0 12.5 12.7 16.4 15.3 10.5 6.13 2.58 2.05 1.99 MAX 14.9 19.7 28.8 43.6 22.4 31.5 48.2 23.2 32.4 10.5 12.4 10.4 (WY) 1990 1973 1987 1979 1982 1994 1983 1979 1982 1959 1986 1961 MIN .83 1.12 1.83 1.69 2.95 6.91 4.29 3.93 .82 .17 .12 .049 (WY) 1964 1966 1966 1981 1980 1981 1999 1986 1999 1994 1999 1980 e Estimated. PAWCATUCK RIVER BASIN 01118300 PENDLETON HILL BROOK NEAR CLARKS FALLS, CT—Continued SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1959 - 1999 ANNUAL TOTAL 4178.01 2212.31 ANNUAL MEAN 11.4 6.06 8.62 HIGHEST ANNUAL MEAN 13.1 1984 LOWEST ANNUAL MEAN 4.29 1966 HIGHEST DAILY MEAN 133 Jan 24 100 Feb 3 251 Mar 18 1968 LOWEST DAILY MEAN .46 Sep 6 .03 Aug 7 .01 Sep 9 1980 ANNUAL SEVEN-DAY MINIMUM .49 Sep 15 .03 Aug 31 .01 Sep 9 1980 INSTANTANEOUS PEAK FLOW 161 Feb 3 304 Jun 5 1982 INSTANTANEOUS PEAK STAGE 4.74 Feb 3 6.73 Jun 5 1982 INSTANTANEOUS LOW FLOW a.03 Aug 5 .00 Aug 22 1987 ANNUAL RUNOFF (CFSM) 2.85 1.51 2.15 ANNUAL RUNOFF (INCHES) 38.66 20.47 29.15 10 PERCENT EXCEEDS 27 17 19 50 PERCENT EXCEEDS 6.5 2.3 5.8 90 PERCENT EXCEEDS .71 .16 .56 a Also occurred Aug. 6-8 and Sep. 1-6.