MILL RIVER BASIN 01196620 MILL RIVER NEAR HAMDEN, CT LOCATION.--Lat 4125'15", long 7254'12", New Haven County, Hydrologic Unit 01100004, 150 ft downstream from bridge on Mount Carmel Avenue, 0.4 mi downstream from Eatons Brook, and 2.5 mi north of Hamden. DRAINAGE AREA.--24.5 mi2. PERIOD OF RECORD.--October 1968 to September 1970, October 1978 to current year. GAGE.--Water-stage recorder. Datum of gage is 82.57 ft above sea level. October 1, 1968, to September 30, 1970, 150 ft upstream at datum 0.73 ft higher. REMARKS.--Records good except for periods of estimated record, which are fair. 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 11 36 125 62 88 42 156 47 22 8.0 3.9 9.1 2 10 35 642 63 85 49 121 59 25 8.0 3.7 8.6 3 11 33 265 69 74 45 118 124 27 38 3.8 7.7 4 8.3 30 155 69 67 47 100 136 21 16 18 7.0 5 8.0 30 119 63 286 47 85 78 19 11 62 6.6 6 7.6 29 189 62 152 70 77 79 18 9.3 19 6.2 7 7.4 30 181 54 97 49 71 77 17 9.2 10 6.2 8 22 96 220 49 83 43 65 60 18 10 8.1 6.2 9 105 226 155 47 74 40 59 61 17 17 7.6 6.2 10 42 128 120 51 67 54 51 59 16 42 7.0 6.2 11 25 81 111 50 63 60 48 50 15 15 6.0 7.3 12 17 66 140 44 62 48 59 46 14 10 5.3 9.7 13 15 58 162 41 56 41 131 44 33 8.5 7.3 6.5 14 13 53 170 40 80 58 76 43 29 7.6 8.4 5.2 15 12 49 173 38 113 178 58 41 16 9.1 5.6 4.8 16 12 45 136 153 85 86 52 38 14 13 9.5 4.5 17 11 44 223 103 67 68 53 35 13 8.8 6.9 4.4 18 10 43 214 e55 63 64 101 35 14 7.4 50 4.1 19 93 44 181 e44 67 60 103 42 120 6.8 20 4.0 20 643 41 163 e40 65 61 73 53 32 5.7 11 3.7 21 191 39 113 e39 58 61 62 38 20 11 147 3.3 22 100 37 99 e38 62 68 58 33 16 43 82 3.1 23 72 35 96 54 57 55 53 30 13 25 28 3.3 24 65 33 97 43 49 47 50 28 12 23 17 3.4 25 51 33 141 461 e43 45 47 39 12 36 13 3.3 26 45 243 92 154 e42 63 44 44 11 19 11 3.2 27 41 131 84 89 49 53 42 30 12 6.5 9.6 3.2 28 46 73 78 225 45 46 82 26 9.7 6.0 20 3.6 29 46 61 78 129 --- 46 67 25 9.3 5.0 20 16 30 42 56 83 86 --- 47 48 23 8.7 4.4 15 7.8 31 41 --- 71 79 --- 127 --- 23 --- 4.4 11 --- TOTAL 1823.3 1938 4876 2594 2199 1868 2210 1546 623.7 443.7 646.7 174.4 MEAN 58.8 64.6 157 83.7 78.5 60.3 73.7 49.9 20.8 14.3 20.9 5.81 MAX 643 243 642 461 286 178 156 136 120 43 147 16 MIN 7.4 29 71 38 42 40 42 23 8.7 4.4 3.7 3.1 CFSM 2.40 2.64 6.42 3.42 3.21 2.46 3.01 2.04 .85 .58 .85 .24 IN. 2.77 2.94 7.40 3.94 3.34 2.84 3.36 2.35 .95 .67 .98 .26 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1979 - 1997, BY WATER YEAR (WY) MEAN 26.7 41.4 58.8 64.4 60.7 85.6 95.4 58.8 56.5 18.8 19.8 12.8 MAX 123 99.1 192 258 108 183 317 169 411 58.2 70.0 29.0 (WY) 1990 1990 1984 1979 1984 1983 1983 1989 1982 1984 1989 1989 MIN 4.91 9.72 12.8 8.96 16.5 38.0 20.9 18.9 9.58 5.04 3.11 2.29 (WY) 1987 1982 1983 1981 1980 1985 1985 1986 1988 1995 1981 1995 e Estimated. SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1979 - 1997 ANNUAL TOTAL 23786.9 20942.8 ANNUAL MEAN 65.0 57.4 50.1 HIGHEST ANNUAL MEAN 85.1 1984 LOWEST ANNUAL MEAN 18.7 1985 HIGHEST DAILY MEAN 1010 Apr 16 643 Oct 20 4300 Jun 6 1982 LOWEST DAILY MEAN 3.9 Sep 3 3.1 Sep 22 .15 Sep 12 1995 ANNUAL SEVEN-DAY MINIMUM 4.2 Aug 31 3.3 Sep 21 .21 Sep 6 1995 INSTANTANEOUS PEAK FLOW 996 Dec 2 a5580 Jun 6 1982 INSTANTANEOUS PEAK STAGE 3.84 Dec 2 b9.53 Jun 6 1982 INSTANTANEOUS LOW FLOW d3.1 Sep 21 c.15 Sep 12 1995 ANNUAL RUNOFF (CFSM) 2.65 2.34 2.04 ANNUAL RUNOFF (INCHES) 36.12 31.80 27.77 10 PERCENT EXCEEDS 132 126 101 50 PERCENT EXCEEDS 42 44 28 90 PERCENT EXCEEDS 8.5 7.0 6.5 a From contracted opening measurement 0.7 mi downstream. b From outside floodmarks at the gage. c Also occurred on Sept. 13, 1995. d Also occurred on Sept. 22, 23, 25-27.