CONNECTICUT RIVER BASIN 01189995 FARMINGTON RIVER AT TARIFFVILLE, CT LOCATION.--Lat 4154'30", long 7245'40", Hartford County, Hydrologic Unit 01080207, on right bank at Tariffville, behind house at 20 Tunxis Road, 0.3 mi downstream from bridge on State Highway 189 and 5.5 mi upstream from gage at Rainbow. DRAINAGE AREA.--577 mi2. WATER-DISCHARGE RECORDS PERIOD OF RECORD.--January 1913 to August 1928 furnished by Farmington River Power Company. August 1928 to September 1939, October 1971 to current year. REVISED RECORDS.--WSP 851: 1936. WSP 1301: 1937-39 (revised records published are included with those for "Farmington River at Rainbow, Conn."). WDR CT-76-1: 1972-75. WDR CT-80-1: Drainage area. GAGE.--Water-stage recorder August 1928 to September 1939 and since October 1971. January 1913 to August 1928, staff gage on forebay of dam of Hartford Electric Light Co. Datum of gage is 130.21 ft above sea level. REMARKS.--Records good except for periods of estimated record, which are fair. Flow regulated by Otis Reservoir, Colebrook River Lake, West Branch Reservoir, Mad River and Sucker Brook Detention Reservoirs, Highland Lake, Barkhamsted, East Branch, Nepaug and Whigville Reservoirs, and by diversion for municipal supply from Barkhamsted, Nepaug and Whigville Reservoirs. Telephone gage-height telemeter at this station. 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 1 395 400 1160 e815 900 1770 1670 1050 1190 3190 637 499 2 325 1700 1280 e720 846 1920 2310 1470 1260 2610 630 485 3 323 1580 1030 731 835 1860 2570 1920 1360 1920 602 495 4 340 1070 928 845 846 1720 2180 1610 1350 1400 533 492 5 342 787 909 1480 877 1580 1810 1410 1070 1090 489 440 6 347 659 874 1700 878 1460 1600 1860 890 1050 483 384 7 333 604 804 1980 819 1360 1450 2670 765 1140 469 389 8 313 627 759 3030 767 1310 1310 2500 769 1020 470 507 9 314 1780 722 3380 736 3150 1290 2270 769 1040 487 508 10 357 2420 695 2900 717 5660 2290 3810 748 1010 475 493 11 321 1720 715 2270 712 5440 2540 6120 723 840 449 484 12 293 1190 711 1740 1380 3990 1990 6740 747 753 437 485 13 298 942 764 1490 2190 2790 1650 5800 1140 725 431 473 14 307 862 785 1400 1770 2360 1450 4410 2010 721 420 474 15 305 897 738 1220 e1200 2230 1400 3700 2590 695 414 499 16 321 835 691 1200 e1080 2070 1780 2770 2220 683 442 519 17 382 760 674 1200 1020 1920 1310 2130 2700 680 469 525 18 384 783 704 1170 2050 1850 1370 1950 2630 771 477 539 19 343 805 689 1060 2470 2600 1310 1910 2120 753 487 528 20 313 768 690 1070 2230 3670 1710 1610 2080 685 447 522 21 310 744 681 1070 1900 3350 1870 1580 1660 701 422 514 22 290 1000 e625 1000 1680 2910 1580 1760 1170 679 420 418 23 282 1490 e600 953 1500 2510 1460 1580 1050 700 402 451 24 273 1290 e595 1790 1630 2220 1530 1190 1020 796 399 334 25 277 1080 710 2330 2230 2070 1480 1050 1040 660 428 290 26 303 949 998 1890 2130 1970 1390 1090 992 618 569 279 27 344 959 1030 1400 1910 2000 1490 1030 859 597 619 287 28 398 947 944 1140 1710 2080 1360 968 848 598 536 310 29 370 853 828 1040 --- 2040 1280 953 818 595 520 468 30 333 834 1080 991 --- 1920 1200 927 1490 576 497 580 31 311 --- 1280 962 --- 1780 --- 814 --- 553 495 --- TOTAL 10147 31335 25693 45967 39013 75560 49630 70652 40078 29849 15055 13671 MEAN 327 1045 829 1483 1393 2437 1654 2279 1336 963 486 456 MAX 398 2420 1280 3380 2470 5660 2570 6740 2700 3190 637 580 MIN 273 400 595 720 712 1310 1200 814 723 553 399 279 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1972 - 1998, BY WATER YEAR (WY) MEAN 822 1023 1237 1271 1291 1854 2225 1511 1169 706 673 670 MAX 2233 1985 3287 2886 2790 3378 4721 3329 3647 2398 1285 1794 (WY) 1976 1996 1997 1978 1976 1983 1983 1989 1982 1972 1990 1975 MIN 253 351 287 140 366 627 475 470 355 306 361 272 (WY) 1981 1985 1981 1981 1980 1985 1985 1985 1985 1985 1995 1995 e Estimated. SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1972 - 1998 ANNUAL TOTAL 383750 446650 ANNUAL MEAN 1051 1224 1203 HIGHEST ANNUAL MEAN 1637 1972 LOWEST ANNUAL MEAN 451 1985 HIGHEST DAILY MEAN 3740 Apr 8 6740 May 12 14200 Mar 23 1980 LOWEST DAILY MEAN 273 Oct 24 273 Oct 24 128 Feb 7 1985 ANNUAL SEVEN-DAY MINIMUM 293 Oct 20 293 Oct 20 131 Jan 19 1981 INSTANTANEOUS PEAK FLOW 6980 May 12 a29900 Sep 22 1938 INSTANTANEOUS PEAK STAGE 6.99 May 12 b14.00 Sep 22 1938 INSTANTANEOUS LOW FLOW 190 Jul 23 c 10 PERCENT EXCEEDS 2010 2270 2450 50 PERCENT EXCEEDS 816 953 820 90 PERCENT EXCEEDS 341 393 392 a From computation of flow over dam 0.6 mi downstream. b From floodmarks. c Probably less than 30 ft3/s Mar. 1, 1938, river below intake.