CONNECTICUT RIVER BASIN 01189995 FARMINGTON RIVER AT TARIFFVILLE, CT LOCATION.--Lat 41×54'30", long 72×45'40", Hartford County, Hydrologic Unit 01080207, on right bank at Tariffville, behind house at 20 Tunxis Road, 0.3 mi downstream from bridge on State Route 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. Telephone telemetry at station. REMARKS.--Records good except those for periods of estimated daily discharges, 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. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 621 374 533 e265 e855 2540 1630 531 636 470 389 302 2 602 358 475 e255 e1000 2670 1500 514 558 434 381 216 3 578 362 455 e250 3360 1790 1420 505 535 418 334 191 4 581 396 440 743 2910 3580 1350 544 469 483 329 182 5 397 396 438 e750 2280 3900 1290 703 504 568 328 177 6 287 396 419 e570 1800 2650 1330 748 638 614 338 190 7 269 391 404 e480 1490 e1700 1320 674 564 587 327 276 8 311 388 420 e430 1300 e1450 1270 706 528 499 332 402 9 692 393 495 e410 1170 e1390 1220 747 550 444 339 289 10 867 393 488 e500 1090 e1340 1440 750 424 429 330 696 11 978 449 468 717 1060 e1300 1550 597 383 425 330 1090 12 679 576 456 e600 1060 e1290 1290 511 366 417 336 565 13 448 512 441 e525 1290 e1270 1020 482 397 411 336 336 14 901 470 439 e475 1240 e1250 875 464 395 434 378 293 15 1940 448 400 e470 1010 1440 892 438 365 424 489 336 16 1180 435 324 e450 932 1500 861 389 356 426 444 1640 17 695 424 319 e420 890 1560 890 389 352 419 377 7960 18 577 422 320 e410 1130 1700 804 398 354 417 354 6670 19 672 408 314 1630 1940 1810 763 465 354 451 344 3530 20 760 400 311 2080 1590 1680 841 2230 390 511 338 1790 21 773 409 309 e1700 1250 1510 818 2200 358 419 350 1300 22 758 411 324 e1500 1050 4120 792 1550 378 380 429 1230 23 744 393 362 e1400 e990 5940 828 1250 375 365 415 1280 24 733 391 369 2330 e950 4590 963 1460 387 340 372 1090 25 515 411 333 3860 e910 3090 876 2370 396 396 358 884 26 383 496 e282 2820 e900 2600 683 2310 398 363 356 775 27 358 1180 e272 1910 e900 2130 627 1830 387 330 397 707 28 360 955 e265 1500 1110 2070 688 1580 383 346 340 774 29 368 694 e260 e1050 --- 2250 700 1220 438 341 297 816 30 375 597 331 e950 --- 2040 590 1020 485 366 287 945 31 366 --- e275 e880 --- 1780 --- 784 --- 387 342 --- TOTAL 19768 14328 11741 32330 37457 69930 31121 30359 13103 13314 11096 36932 MEAN 638 478 379 1043 1338 2256 1037 979 437 429 358 1231 MAX 1940 1180 533 3860 3360 5940 1630 2370 638 614 489 7960 MIN 269 358 260 250 855 1250 590 389 352 330 287 177 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1972 - 1999, BY WATER YEAR (WY) MEAN 815 1004 1206 1263 1292 1868 2182 1492 1143 697 662 690 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 253 351 287 140 366 627 475 470 355 306 358 272 (WY) 1981 1985 1981 1981 1980 1985 1985 1985 1985 1985 1999 1995 e Estimated. CONNECTICUT RIVER BASIN 01189995 FARMINGTON RIVER AT TARIFFVILLE, CT—Continued SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1972 - 1999 ANNUAL TOTAL 425312 321479 ANNUAL MEAN 1165 881 1191 HIGHEST ANNUAL MEAN 1637 1972 LOWEST ANNUAL MEAN 451 1985 HIGHEST DAILY MEAN 6740 May 12 7960 Sep 17 14200 Mar 23 1980 LOWEST DAILY MEAN 260 Dec 29 177 Sep 5 128 Feb 7 1985 ANNUAL SEVEN-DAY MINIMUM 288 Dec 25 219 Sep 1 131 Jan 19 1981 INSTANTANEOUS PEAK FLOW 8960 Sep 17 a29900 Sep 22 1938 INSTANTANEOUS PEAK STAGE 7.98 Sep 17 b14.00 Sep 22 1938 INSTANTANEOUS LOW FLOW 174 Sep 5 c 10 PERCENT EXCEEDS 2250 1780 2440 50 PERCENT EXCEEDS 835 515 810 90 PERCENT EXCEEDS 390 332 384 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.