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 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 4.2 52 22 e41 59 86 70 49 141 89 12 5.1 2 3.7 89 18 39 52 74 112 120 54 42 9.9 4.9 3 3.7 31 16 40 51 69 76 77 103 30 8.8 5.0 4 3.7 17 18 45 49 66 65 64 51 25 8.2 4.4 5 3.9 12 18 45 63 60 59 63 38 25 8.0 4.0 6 3.8 9.4 18 42 53 54 56 92 32 22 7.9 3.9 7 3.5 8.2 16 48 46 51 50 127 29 20 7.1 6.4 8 3.3 22 15 144 44 53 49 82 28 20 6.6 10 9 3.1 93 14 100 40 544 56 157 26 21 8.0 5.6 10 3.1 79 14 74 39 521 238 254 25 19 8.0 4.7 11 2.9 33 16 59 39 200 102 278 23 17 8.6 4.3 12 3.0 21 15 49 194 138 78 191 34 16 9.4 4.0 13 3.2 17 17 48 98 111 69 123 91 15 7.9 3.7 14 3.3 22 15 45 69 116 65 102 92 14 7.6 3.7 15 3.3 25 e12 39 53 113 62 91 67 14 7.4 3.7 16 3.6 26 13 55 47 95 59 79 67 13 7.0 4.6 17 3.7 21 13 48 50 85 67 73 47 14 9.1 5.1 18 3.4 18 13 47 393 87 68 68 41 23 13 3.4 19 3.5 17 13 41 180 294 58 60 34 15 13 3.1 20 3.6 16 14 39 120 219 128 54 43 13 8.6 3.1 21 3.2 15 14 36 101 140 76 50 45 13 7.7 2.7 22 3.0 54 e12 32 84 126 63 46 34 12 7.1 15 23 2.6 46 30 61 76 108 70 43 33 22 7.0 9.4 24 2.9 30 29 546 186 102 78 39 31 22 5.8 4.5 25 12 23 75 216 139 88 60 53 29 13 4.3 3.8 26 9.4 20 73 121 97 82 67 52 24 12 43 3.6 27 18 21 50 94 84 79 80 39 22 11 29 12 28 9.5 17 40 84 78 74 59 34 21 10 12 16 29 5.1 17 33 76 --- 70 52 34 20 12 8.1 5.1 30 4.2 17 145 70 --- 65 50 44 85 14 6.6 4.0 31 4.3 --- 76 65 --- 63 --- 54 --- 14 6.0 --- TOTAL 143.7 888.6 887 2489 2584 4033 2242 2692 1410 622 312.7 168.8 MEAN 4.64 29.6 28.6 80.3 92.3 130 74.7 86.8 47.0 20.1 10.1 5.63 MAX 18 93 145 546 393 544 238 278 141 89 43 16 MIN 2.6 8.2 12 32 39 51 49 34 20 10 4.3 2.7 CFSM .19 1.21 1.17 3.28 3.77 5.31 3.05 3.54 1.92 .82 .41 .23 IN. .22 1.35 1.35 3.78 3.92 6.12 3.40 4.09 2.14 .94 .47 .26 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1979 - 1998, BY WATER YEAR (WY) MEAN 24.9 40.8 57.3 65.2 62.3 87.8 94.4 60.2 56.0 18.8 19.4 12.5 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 4.64 9.72 12.8 8.96 16.5 38.0 20.9 18.9 9.58 5.04 3.11 2.29 (WY) 1998 1982 1983 1981 1980 1985 1985 1986 1988 1995 1981 1995 e Estimated. SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1979 - 1998 ANNUAL TOTAL 14224.8 18472.8 ANNUAL MEAN 39.0 50.6 49.9 HIGHEST ANNUAL MEAN 85.1 1984 LOWEST ANNUAL MEAN 18.7 1985 HIGHEST DAILY MEAN 461 Jan 25 546 Jan 24 4300 Jun 6 1982 LOWEST DAILY MEAN 2.6 Oct 23 2.6 Oct 23 .15 Sep 12 1995 ANNUAL SEVEN-DAY MINIMUM 3.1 Oct 8 3.1 Oct 8 .21 Sep 6 1995 INSTANTANEOUS PEAK FLOW 929 Mar 9 a5580 Jun 6 1982 INSTANTANEOUS PEAK STAGE 3.72 Mar 9 b9.53 Jun 6 1982 INSTANTANEOUS LOW FLOW d2.3 Oct 23 c.15 Sep 12 1995 ANNUAL RUNOFF (CFSM) 1.59 2.07 2.03 ANNUAL RUNOFF (INCHES) 21.60 28.05 27.65 10 PERCENT EXCEEDS 81 102 101 50 PERCENT EXCEEDS 25 33 28 90 PERCENT EXCEEDS 4.1 4.1 6.4 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. 21 and 22.