MILL RIVER BASIN 01196620 MILL RIVER NEAR HAMDEN, CT LOCATION.--Lat 41o25'15", long 72o54'12", 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. Several measurements of water temperature and specific conductance were made during the water year and are listed in the miscellaneous specific conductance and temperature determinations tables. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1994 TO SEPTEMBER 1995 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 17 16 28 89 41 105 27 63 18 6.8 2.8 .86 2 19 17 24 102 40 66 26 43 15 7.1 2.6 .58 3 15 12 22 70 35 54 24 33 14 6.7 10 .36 4 14 11 21 54 e33 48 26 29 14 6.0 4.9 .32 5 13 10 78 43 e32 46 25 28 13 5.9 9.4 .33 6 13 10 103 38 e30 48 22 31 12 5.1 50 .31 7 12 9.4 51 173 e29 46 23 25 13 5.2 12 .23 8 12 8.7 40 99 e27 52 25 23 13 5.6 6.7 .17 9 11 8.9 33 67 e25 213 33 22 11 4.9 5.0 .19 10 12 16 38 54 e24 95 62 24 10 4.7 4.3 .24 11 11 14 129 48 e24 75 33 41 10 4.8 3.8 .16 12 10 11 63 48 e23 66 29 33 28 4.3 3.4 .15 13 11 10 44 54 e22 61 84 28 20 4.3 3.5 .33 14 11 10 39 67 e22 56 48 24 17 4.0 2.8 .63 15 11 9.9 37 68 e21 56 35 29 15 3.4 2.6 .26 16 11 9.4 34 76 59 52 30 27 12 3.5 2.5 .17 17 10 9.1 34 63 45 51 28 25 9.7 3.9 2.2 11 18 10 11 48 51 39 47 26 28 9.2 11 1.9 7.8 19 10 24 37 48 37 42 65 27 8.8 5.9 1.6 2.3 20 10 14 30 146 41 40 55 26 8.0 3.7 1.5 1.5 21 12 19 28 179 45 44 39 21 7.2 3.9 1.4 1.2 22 10 103 27 105 39 45 41 18 7.1 3.3 1.2 3.7 23 11 34 27 87 36 40 33 17 7.0 3.9 1.0 11 24 20 22 250 78 84 35 30 16 7.1 5.8 1.0 3.4 25 12 18 147 66 58 32 29 16 12 3.5 .81 2.5 26 11 16 84 59 41 31 27 18 11 3.4 .70 7.1 27 10 14 65 54 35 30 26 16 12 3.2 .80 4.9 28 9.5 90 58 48 100 29 27 14 8.7 2.9 .89 2.8 29 9.2 74 51 42 --- 27 26 18 7.5 9.4 .64 2.1 30 9.2 37 41 40 --- 28 26 55 6.9 6.6 .70 2.0 31 9.1 --- 38 41 --- 28 --- 26 --- 3.5 .45 --- TOTAL 366.0 668.4 1749 2257 1087 1688 1030 844 357.2 156.2 143.09 68.59 MEAN 11.8 22.3 56.4 72.8 38.8 54.5 34.3 27.2 11.9 5.04 4.62 2.29 MAX 20 103 250 179 100 213 84 63 28 11 50 11 MIN 9.1 8.7 21 38 21 27 22 14 6.9 2.9 .45 .15 CFSM .48 .91 2.30 2.97 1.58 2.22 1.40 1.11 .49 .21 .19 .09 IN. .56 1.01 2.66 3.43 1.65 2.56 1.56 1.28 .54 .24 .22 .10 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1979 - 1995, BY WATER YEAR (WY) MEAN 24.6 39.3 55.0 61.0 59.3 88.7 94.3 59.0 60.5 18.8 20.4 13.1 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 SUMMARY STATISTICS FOR 1994 CALENDAR YEAR FOR 1995 WATER YEAR WATER YEARS 1979 - 1995 ANNUAL TOTAL 16293.4 10414.48 ANNUAL MEAN 44.6 28.5 49.6 HIGHEST ANNUAL MEAN 85.1 1984 LOWEST ANNUAL MEAN 18.7 1985 HIGHEST DAILY MEAN 357 Mar 22 250 Dec 24 4300 Jun 6 1982 LOWEST DAILY MEAN 6.2 Jul 22 .15 Sep 12 .15 Sep 12 1995 ANNUAL SEVEN-DAY MINIMUM 7.6 Jul 16 .21 Sep 6 .21 Sep 6 1995 INSTANTANEOUS PEAK FLOW 346 Dec 24 a5580 Jun 6 1982 INSTANTANEOUS PEAK STAGE 2.49 Dec 24 b9.53 Jun 6 1982 INSTANTANEOUS LOW FLOW c.15 Sep 12 c.15 Sep 12 1995 ANNUAL RUNOFF (CFSM) 1.82 1.16 2.02 ANNUAL RUNOFF (INCHES) 24.74 15.81 27.50 10 PERCENT EXCEEDS 103 63 100 50 PERCENT EXCEEDS 27 21 27 90 PERCENT EXCEEDS 9.1 2.4 6.4 a From contracted opening measurement 0.7 miles downstream. b From outside flood marks at the gage. c Also occurred on Sept. 13. e Estimated