CONNECTICUT RIVER BASIN 01172003 CONNECTICUT RIVER BELOW HOLYOKE DAM AT HOLYOKE, MA LOCATION.--Lat 42o12'36", long 72o35'44", Hampden County, Hydrologic Unit 01080201, on right bank, 2,200 ft downstream from dam of Holyoke Water Power Co. in Holyoke, MA. and at mile 86. DRAINAGE AREA.--8,309 mi2 . PERIOD OF RECORD.--December 1983 to current year. GAGE.--Water-stage recorder. Datum of gage is 43.276 ft above sea level. REMARKS.--No estimated daily discharges. Records good. Telephone gage-height telemeter at this station. Several measurements of water temperature were made during the year. Flow regulated by powerplants, by First Connecticut and Second Connecticut Lakes, Lake Francis, Moore and Comerford Reservoirs, and other reservoirs, combined usable capacity, about 47 billion ft3. Records do not include water diverted around gage by Holyoke Water Power Company for industrial use. EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge since at least 1854, 244,000 ft3/s, March 20, 1936, gage height, 35.0 ft, from floodmarks. 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 8080 3790 8550 8800 8170 8600 14200 9200 9850 2540 3940 3160 2 7360 6730 8560 9870 11400 10300 13500 10300 9410 2710 4780 1800 3 7740 8160 6520 9770 8070 9210 13400 9860 7600 2140 3810 1320 4 8550 5640 4070 9740 6200 9860 10800 9560 8610 2030 4650 1310 5 6450 4190 5970 8960 7430 8820 9000 9690 9370 2050 7860 1380 6 5360 3490 15000 6830 6360 8190 11800 6030 9820 1760 8720 1200 7 5040 3970 30400 8440 8170 9350 11300 4720 10300 1500 10600 1420 8 4700 5240 23900 9260 7550 10800 8160 6320 10200 1380 14200 2490 9 4310 5960 19900 8440 7620 21900 7960 5530 5840 1230 11200 1560 10 6040 7530 16600 8890 7280 30200 8800 7020 3780 1220 8100 1240 11 7150 6280 12500 9260 7370 20900 11000 6760 3530 1290 6860 925 12 5080 4910 12800 8980 6620 18300 9540 4630 5040 1620 4340 911 13 5040 6500 12500 9720 6790 14200 12100 6220 6320 2010 2590 2020 14 3610 6500 10000 7180 7580 14600 11500 6680 6960 2170 2870 2490 15 3260 6500 7840 8760 6760 14800 11700 5900 5280 2540 5040 1280 16 3560 6500 8810 10800 8730 23200 10300 8670 3960 1680 6130 1090 17 3600 6490 9170 31300 9290 31100 8980 9090 4180 1640 5330 1300 18 4500 7320 7780 40400 8410 36100 11100 8480 3500 2790 4800 1750 19 3040 7320 6640 38900 6440 32000 8910 8280 3730 5030 3320 1570 20 6420 7320 8730 33400 7340 28000 8060 9070 6020 3430 2580 1200 21 5950 5360 7710 32800 6290 27500 10200 9890 3590 2480 2620 2270 22 4340 5350 8820 36700 7260 28100 9000 8240 3000 2190 2730 1930 23 3020 7790 9560 35300 6630 34200 9250 9200 2950 2830 1750 3390 24 4150 7010 10400 28200 7790 33400 11100 6800 2600 1710 1730 2470 25 5070 7010 17000 21700 8280 27900 11100 6470 2430 1980 2310 1560 26 5400 7010 20800 17700 7060 21000 8950 7170 3110 3730 2540 1520 27 4910 7010 16200 13800 6450 17600 8700 8120 2860 5520 1390 2070 28 3350 7010 13300 11800 6970 19200 8850 7000 2560 5760 1130 2070 29 3790 7010 14400 10100 --- 20000 9190 6930 2380 4920 928 2780 30 3220 7880 13900 7880 --- 17400 9540 8240 2360 4170 1280 3170 31 4150 --- 10700 8470 --- 16100 --- 8480 --- 4450 1780 --- TOTAL 156240 188780 379030 512150 210310 622830 307990 238550 161140 82500 141908 54646 MEAN 5040 6293 12230 16520 7511 20090 10270 7695 5371 2661 4578 1822 MAX 8550 8160 30400 40400 11400 36100 14200 10300 10300 5760 14200 3390 MIN 3020 3490 4070 6830 6200 8190 7960 4630 2360 1220 928 911 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1984 - 1995, BY WATER YEAR (WY) MEAN 9125 11250 10710 8570 9005 17630 32890 15870 10010 5312 5678 4702 MAX 16340 16810 20720 16520 21890 34660 58300 31900 31100 8595 14780 8601 (WY) 1991 1991 1991 1995 1984 1990 1993 1989 1984 1984 1990 1987 MIN 1512 3540 5787 4760 4250 9579 10270 7366 4088 2578 2718 1378 (WY) 1985 1985 1985 1989 1987 1989 1995 1987 1988 1991 1985 1984 SUMMARY STATISTICS FOR 1994 CALENDAR YEAR FOR 1995 WATER YEAR WATER YEARS 1984 - 1995 ANNUAL TOTAL 4350130 3056074 ANNUAL MEAN 11920 8373 11290 HIGHEST ANNUAL MEAN 15310 1990 LOWEST ANNUAL MEAN 6580 1985 HIGHEST DAILY MEAN 90000 Apr 18 40400 Jan 18 145000 Jun 1 1984 LOWEST DAILY MEAN 2170 Sep 5 911 Sep 12 519 Sep 30 1984 ANNUAL SEVEN-DAY MINIMUM 3010 Sep 3 1390 Sep 6 707 Sep 18 1984 INSTANTANEOUS PEAK FLOW 44000 Jan 19 153000 Jun 1 1984 INSTANTANEOUS PEAK STAGE 11.83 Jan 19 25.62 Jun 1 1984 INSTANTANEOUS LOW FLOW a200 Aug 15 a200 Aug 15 1995 10 PERCENT EXCEEDS 25000 16100 24400 50 PERCENT EXCEEDS 7070 7010 7630 90 PERCENT EXCEEDS 4030 1960 2920 a Occurred when Hadley 1 generator shutdown. Discharge was derived from extending the rating below 2.5 feet.