THAMES RIVER BASIN 01121000 MOUNT HOPE RIVER NEAR WARRENVILLE, CT LOCATION.--Lat 41o50'37", long 72o10'10", Windham County, Hydrologic Unit 01100002, on left bank 250 ft downstream from Knowlton Brook, 700 ft upstream from bridge on State Highway 89, 1.8 mi south of Warrenville, and 3.2 mi southwest of Ashford. DRAINAGE AREA.--28.6 mi2. PERIOD OF RECORD.--July 1940 to current year. REVISED RECORDS.--WSP 1331: 1941, 1951-53(M). WSP 1721: Drainage area. WDR CT-75-1: 1974(P). GAGE.--Water-stage recorder. Datum of gage is 335.68 ft above sea level. REMARKS.--Records good except for periods of estimated record, which are fair. Satellite gage-height telemeter at this station. Chemical analyses available for water year 1959 (WSP 1641). Occasional regulation from ponds upstream. EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of September 1938 reached a stage of about 14.5 ft, from floodmarks. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 6.6 40 40 e26 e114 e63 42 181 24 8.1 31 6.8 2 5.5 64 48 e26 e101 e57 136 113 20 8.4 22 5.4 3 5.5 69 42 e151 e94 e56 84 97 26 43 17 4.4 4 6.5 52 50 e115 e87 e55 63 111 75 40 14 3.9 5 10 41 45 e85 e84 e55 57 90 49 24 15 3.7 6 82 36 52 e66 e80 137 48 100 33 15 13 3.4 7 42 40 44 e60 e75 116 51 102 25 9.9 10 6.9 8 26 89 37 e56 e85 94 73 84 21 7.6 8.6 9.9 9 20 58 36 e52 e97 93 74 72 18 12 7.8 8.7 10 17 44 e34 e50 e103 e85 91 76 21 11 36 6.6 11 16 43 e32 e49 e94 e80 123 81 25 7.5 17 6.7 12 15 185 e30 e48 e88 e78 173 191 21 9.8 11 7.7 13 15 106 e29 e47 e61 77 147 124 18 212 20 14 14 12 99 e28 e46 e58 99 133 83 15 255 26 22 15 55 257 e28 e46 e56 123 105 69 12 81 16 19 16 30 133 e27 e45 e55 133 1100 70 10 46 12 14 17 18 85 e27 e44 e55 102 697 115 9.5 29 9.7 22 18 14 69 e27 58 e54 89 307 81 18 22 8.1 292 19 12 73 e27 291 e53 81 192 68 12 27 6.7 108 20 12 66 e140 630 e52 143 151 59 20 39 6.1 52 21 129 59 e65 230 172 110 128 63 26 22 5.4 36 22 209 53 e43 143 232 85 104 63 18 17 5.2 34 23 69 49 e38 110 158 71 92 47 15 20 5.4 83 24 48 45 e32 245 173 63 84 41 11 37 21 46 25 38 42 e30 392 144 60 73 35 40 26 18 41 26 39 41 e29 175 100 57 71 31 22 28 11 34 27 32 39 e28 451 84 51 77 30 14 26 7.5 29 28 174 38 e27 689 84 47 63 28 10 18 6.6 26 29 126 38 e27 260 e68 47 93 26 8.1 15 6.2 43 30 69 38 e26 182 --- 44 202 28 7.3 12 6.4 35 31 51 --- e26 139 --- 42 --- 27 --- 14 10 --- TOTAL 1404.1 2091 1194 5007 2761 2493 4834 2386 643.9 1142.3 409.7 1024.1 MEAN 45.3 69.7 38.5 162 95.2 80.4 161 77.0 21.5 36.8 13.2 34.1 MAX 209 257 140 689 232 143 1100 191 75 255 36 292 MIN 5.5 36 26 26 52 42 42 26 7.3 7.5 5.2 3.4 CFSM 1.58 2.44 1.35 5.65 3.33 2.81 5.63 2.69 .75 1.29 .46 1.19 IN. 1.83 2.72 1.55 6.51 3.59 3.24 6.29 3.10 .84 1.49 .53 1.33 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 1996, BY WATER YEAR (WY) MEAN 26.2 48.2 62.3 69.4 72.7 107 94.2 60.5 35.8 14.9 16.7 16.4 MAX 144 131 163 264 203 219 197 119 207 60.4 148 118 (WY) 1956 1956 1974 1979 1970 1972 1983 1984 1982 1972 1955 1954 MIN 3.44 7.64 14.4 12.0 16.2 47.4 29.7 19.0 4.99 1.35 .79 1.05 (WY) 1958 1950 1944 1981 1980 1981 1985 1957 1957 1957 1957 1953 SUMMARY STATISTICS FOR 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1941 - 1996 ANNUAL TOTAL 15447.4 25390.1 ANNUAL MEAN 42.3 69.4 51.9 HIGHEST ANNUAL MEAN 75.0 1972 LOWEST ANNUAL MEAN 26.0 1965 HIGHEST DAILY MEAN 407 Mar 9 1100 Apr 16 2640 Aug 19 1955 LOWEST DAILY MEAN 1.2 Aug 23 3.4 Sep 6 .20 Aug 21 1957 ANNUAL SEVEN-DAY MINIMUM 1.5 Aug 20 4.9 Sep 1 .40 Aug 8 1957 INSTANTANEOUS PEAK FLOW 2740 Apr 16 a5590 Aug 19 1955 INSTANTANEOUS PEAK STAGE 8.86 Apr 16 b10.41 Aug 19 1955 INSTANTANEOUS LOW FLOW 3.0 Sep 7 .15 Aug 25 1957 ANNUAL RUNOFF (CFSM) 1.48 2.43 1.82 ANNUAL RUNOFF (INCHES) 20.09 33.02 24.67 10 PERCENT EXCEEDS 90 139 113 50 PERCENT EXCEEDS 36 44 31 90 PERCENT EXCEEDS 2.5 9.9 4.1 a From rating curve extended above 890 ft3/s on basis of contracted opening of peak flow. b From floodmarks in gage well. e Estimated.