SURFACE-WATER RECORDS PAWCATUCK RIVER BASIN 01118300 PENDLETON HILL BROOK NEAR CLARKS FALLS, CT LOCATION.--Lat 4128'29", long 7150'05", New London County, Hydrologic Unit 01090005, on left bank just upstream from twin culverts on Grindstone Hill Road, 0.1 mi west of State Highway 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. REMARKS.--Records good except those for periods of estimated record, which are fair. Satellite gage-height telemeter at this station. 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 1.8 8.4 13 e10 17 7.4 39 12 4.1 .72 .25 1.0 2 1.7 7.6 47 11 16 7.8 31 12 5.0 .71 .22 1.1 3 1.6 6.9 33 13 15 7.3 27 11 5.6 .76 .23 1.0 4 1.4 6.3 22 14 14 7.8 22 11 4.3 .74 .52 .90 5 1.3 5.8 17 12 40 8.3 18 9.7 3.5 .63 .57 .77 6 1.2 5.4 26 12 33 11 16 10 3.2 .58 1.6 .70 7 1.2 5.8 30 11 22 8.9 15 10 3.0 .55 1.0 .65 8 4.5 8.1 65 9.8 17 7.4 14 8.8 2.8 .52 .61 .65 9 17 13 39 8.4 15 6.7 12 8.7 2.5 .52 1.5 .65 10 8.6 14 27 11 e13 8.5 11 9.3 2.3 .52 1.0 .64 11 5.4 11 23 e9.0 13 11 11 8.4 2.0 .49 .70 .63 12 4.2 8.5 23 e7.7 12 10 12 7.4 1.7 .45 .55 1.7 13 3.3 7.2 23 e7.0 11 8.4 36 7.0 1.9 .40 .77 1.1 14 2.7 6.4 21 e6.5 17 11 22 6.7 2.1 .38 1.3 .90 15 2.4 5.8 22 e6.0 23 37 16 6.7 1.6 .36 .78 .79 16 2.3 5.3 19 16 17 22 14 7.7 1.4 .36 .62 .69 17 2.2 5.1 29 e17 14 16 13 6.5 1.4 .37 1.4 .63 18 2.1 5.0 35 e9.0 13 14 16 5.8 1.4 .35 12 .58 19 2.2 5.4 40 e7.3 12 12 23 9.0 1.6 .31 5.0 .62 20 65 5.5 46 e6.7 12 11 19 9.2 1.4 .27 2.2 .51 21 33 5.0 29 e6.5 11 11 15 7.2 1.2 .27 8.5 .57 22 22 4.7 22 e7.0 11 14 13 6.0 1.0 .59 6.6 .55 23 17 4.4 20 17 9.4 12 12 5.2 1.0 .52 3.0 .52 24 15 4.2 19 e12 8.5 10 12 4.7 .90 .43 2.0 .52 25 13 4.1 29 31 7.5 9.2 11 8.0 1.0 .74 1.4 .52 26 11 21 21 e20 7.1 16 10 10 1.7 .67 1.1 .50 27 9.4 22 19 e16 9.0 14 9.3 7.1 2.0 .50 .89 .50 28 10 14 17 36 8.3 12 16 5.5 1.1 .45 .77 .45 29 11 11 16 e23 --- 11 16 4.6 .89 .38 1.3 .65 30 10 9.4 16 e17 --- 13 13 4.2 .78 .33 2.2 .69 31 9.8 --- 14 e15 --- 24 --- 3.9 --- .28 1.3 --- TOTAL 293.3 246.3 822 404.9 417.8 379.7 514.3 243.3 64.37 15.15 61.88 21.68 MEAN 9.46 8.21 26.5 13.1 14.9 12.2 17.1 7.85 2.15 .49 2.00 .72 MAX 65 22 65 36 40 37 39 12 5.6 .76 12 1.7 MIN 1.2 4.1 13 6.0 7.1 6.7 9.3 3.9 .78 .27 .22 .45 CFSM 2.35 2.04 6.60 3.25 3.71 3.05 4.26 1.95 .53 .12 .50 .18 IN. 2.71 2.28 7.61 3.75 3.87 3.51 4.76 2.25 .60 .14 .57 .20 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1959 - 1997, BY WATER YEAR (WY) MEAN 3.90 8.18 12.6 12.1 12.4 16.1 15.4 10.5 5.95 2.53 2.13 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 4.78 3.93 1.28 .17 .20 .049 (WY) 1964 1966 1966 1981 1980 1981 1966 1986 1964 1994 1965 1980 e Estimated. SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1959 - 1997 ANNUAL TOTAL 4013.31 3484.68 ANNUAL MEAN 11.0 9.55 8.61 HIGHEST ANNUAL MEAN 13.1 1984 LOWEST ANNUAL MEAN 4.29 1966 HIGHEST DAILY MEAN 65 Jan 20 65 Oct 20 251 Mar 18 1968 LOWEST DAILY MEAN .33 Sep 1 .22 Aug 2 .01 Sep 9 1980 ANNUAL SEVEN-DAY MINIMUM .37 Aug 31 .31 Jul 28 .01 Sep 9 1980 INSTANTANEOUS PEAK FLOW 90 Oct 20 304 Jun 5 1982 INSTANTANEOUS PEAK STAGE 3.39 Oct 20 6.73 Jun 5 1982 INSTANTANEOUS LOW FLOW .07 Sep 28 .00 Aug 22 1987 ANNUAL RUNOFF (CFSM) 2.73 2.37 2.14 ANNUAL RUNOFF (INCHES) 37.14 32.25 29.10 10 PERCENT EXCEEDS 26 22 19 50 PERCENT EXCEEDS 7.2 7.5 5.8 90 PERCENT EXCEEDS 1.2 .57 .57