CONNECTICUT RIVER BASIN 01192704 MATTABESSET RIVER AT RT 372 AT EAST BERLIN, CT LOCATION.--Lat 4136'29", long 7242'56", Hartford County, Hydrologic Unit 01080205, on right bank just upstream from bridge on Route 372, and on the Hartford-Middlesex County line. DRAINAGE AREA.--48.1 mi2. WATER-DISCHARGE RECORDS PERIOD OF RECORD.--January 1995 to current year. GAGE.--Water-stage recorder. Datum of gage is 9.89 ft above sea level. REMARKS.--Records good except for periods of estimated record, which are poor. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 13 143 78 e180 e83 124 e117 59 141 740 20 13 2 11 267 55 e144 e77 99 e160 148 60 198 18 13 3 11 91 43 e99 e74 88 e120 95 183 134 16 12 4 12 46 43 e95 e90 80 e97 74 71 88 15 12 5 18 34 43 e90 e109 73 e82 71 49 69 15 11 6 14 27 40 88 e94 69 e71 194 40 58 15 11 7 11 24 36 104 e83 64 e63 311 36 52 14 30 8 11 55 32 374 e74 67 e70 143 35 53 14 37 9 11 212 30 241 e68 e1140 78 266 33 53 13 15 10 11 166 30 159 e65 e650 459 649 31 50 13 13 11 9.2 71 36 147 e200 e365 174 759 28 41 15 12 12 10 49 38 107 e285 e240 116 457 39 36 16 12 13 11 38 40 87 e195 e190 97 226 104 33 14 11 14 12 49 37 78 e127 e165 87 167 139 29 14 12 15 12 68 31 64 e98 e140 78 133 125 26 13 12 16 12 73 29 116 e86 e125 75 106 97 25 13 14 17 12 58 30 99 e210 e112 87 93 66 25 13 13 18 13 49 30 88 e355 e278 89 87 58 34 19 11 19 13 46 29 73 e280 e440 71 74 52 24 31 10 20 13 43 30 69 e210 e370 236 66 43 23 15 10 21 14 44 29 63 141 e285 113 62 50 23 14 10 22 13 209 24 56 112 e218 85 53 38 22 13 157 23 13 157 46 83 98 e182 80 50 35 42 13 65 24 13 95 64 e660 264 e154 85 51 35 38 13 20 25 48 67 133 e435 231 e137 71 57 33 23 13 15 26 36 59 148 e270 138 e120 101 58 30 20 123 14 27 73 62 114 e200 111 e108 126 47 30 19 37 23 28 39 48 87 e150 99 e96 77 39 28 18 20 40 29 22 44 71 e123 --- e85 68 37 26 18 16 17 30 17 44 e243 e108 --- e78 63 47 767 17 15 16 31 16 --- e219 e92 --- e75 --- 70 --- 25 14 --- TOTAL 544.2 2438 1938 4742 4057 6417 3296 4749 2502 2056 607 661 MEAN 17.6 81.3 62.5 153 145 207 110 153 83.4 66.3 19.6 22.0 MAX 73 267 243 660 355 1140 459 759 767 740 123 157 MIN 9.2 24 24 56 65 64 63 37 26 17 13 10 CFSM .36 1.69 1.30 3.18 3.01 4.30 2.28 3.18 1.73 1.38 .41 .46 IN. .42 1.89 1.50 3.67 3.14 4.96 2.55 3.67 1.94 1.59 .47 .51 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1995 - 1998, BY WATER YEAR (WY) MEAN 90.8 106 116 165 109 123 150 97.0 45.1 46.7 29.2 26.7 MAX 128 124 255 232 145 207 293 153 83.4 66.3 48.5 48.0 (WY) 1997 1996 1997 1996 1998 1998 1996 1998 1998 1998 1997 1996 MIN 17.6 81.3 31.7 109 71.1 85.8 56.3 45.8 27.4 23.3 19.6 15.8 (WY) 1998 1998 1996 1997 1995 1996 1995 1995 1995 1995 1998 1997 e Estimated. SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1995 - 1998 ANNUAL TOTAL 24874.2 34007.2 ANNUAL MEAN 68.1 93.2 98.9 HIGHEST ANNUAL MEAN 107 1996 LOWEST ANNUAL MEAN 93.2 1998 HIGHEST DAILY MEAN 695 Jan 25 1140 Mar 9 1410 Apr 17 1996 LOWEST DAILY MEAN 9.2 Oct 11 9.2 Oct 11 6.0 Sep 11 1995 ANNUAL SEVEN-DAY MINIMUM 11 Oct 7 11 Oct 7 6.1 Sep 6 1995 INSTANTANEOUS PEAK FLOW 1330 Jun 30 2380 Apr 16 1996 INSTANTANEOUS PEAK STAGE 6.58 Jun 30 9.52 Apr 16 1996 INSTANTANEOUS LOW FLOW 8.4 Oct 11 6.0 Sep 11 1995 ANNUAL RUNOFF (CFSM) 1.42 1.94 2.06 ANNUAL RUNOFF (INCHES) 19.24 26.30 27.94 10 PERCENT EXCEEDS 140 204 199 50 PERCENT EXCEEDS 48 59 51 90 PERCENT EXCEEDS 14 13 15