HOUSATONIC RIVER BASIN 01199000 HOUSATONIC RIVER AT FALLS VILLAGE, CT LOCATION.--Lat 41o57'26", long 73o22'11", Litchfield County, Hydrologic Unit 01100005, on left bank at hydroelectric plant of Connecticut Light and Power Company at Falls Village, 1.4 mi downstream from Hollenbeck River, and at mile 75.9. DRAINAGE AREA.--634 mi2. PERIOD OF RECORD.--Discharge: July 1912 to current year. Water-quality records: Water years 1974-80. REVISED RECORDS.--WSP 781: Drainage area. GAGE.--Water-stage recorder. Datum of gage is 529.06 ft above sea level (levels by Corps of Engineers). Prior to Oct. 26, 1964, at site 0.6 mi downstream at datum 6.72 ft lower. REMARKS.--No estimated daily discharges. Records good. 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. Low flow completely regulated by power plant of Connecticut Light and Power Company. High flow is regulated by flood-control reservoirs from 20.5 mi2 in the Blackberry River basin, but does not affect monthly runoff appreciably. 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 1 910 409 1160 1420 1190 1420 1040 811 553 205 199 84 2 645 439 1070 1660 1190 1290 1010 817 471 302 161 84 3 524 472 922 1760 937 1110 940 802 383 204 161 84 4 633 476 775 1660 996 945 821 772 524 217 160 84 5 614 442 949 1130 802 906 1040 659 797 227 194 93 6 594 420 1830 960 752 822 890 697 737 214 388 95 7 486 426 2070 1380 809 1090 817 714 583 200 517 95 8 560 436 1800 1740 832 1430 784 663 486 202 464 95 9 456 412 1510 1650 833 4010 833 597 387 150 370 95 10 480 409 1330 1340 827 4530 874 592 359 212 277 92 11 555 407 1560 1130 823 3950 992 547 363 221 193 91 12 496 411 1670 997 699 2950 900 670 345 238 185 91 13 508 411 1400 1380 696 2350 1240 688 366 311 187 90 14 369 401 1310 1510 674 2350 1620 681 439 320 161 93 15 474 272 1050 1790 652 2380 1440 579 413 237 161 94 16 363 379 982 2390 710 2400 1160 601 346 224 166 93 17 330 372 991 2760 732 2480 1040 602 300 156 162 93 18 333 376 1020 2600 726 2400 1000 589 302 226 162 91 19 340 365 1020 2280 722 2180 996 514 250 224 160 152 20 377 354 988 2110 723 1930 1210 561 240 205 157 173 21 411 430 977 2850 742 1760 1300 592 215 267 124 109 22 463 623 791 3220 732 1890 1290 516 231 154 91 110 23 480 704 886 3120 709 1900 1260 492 225 154 93 244 24 505 642 1610 2670 757 1720 1060 466 240 154 93 269 25 476 522 3410 2230 1070 1570 976 538 198 154 93 194 26 473 510 3010 1910 961 1390 951 595 215 235 94 190 27 454 521 2310 1700 789 1250 857 545 266 289 97 187 28 446 754 1770 1510 850 1130 760 485 213 310 117 183 29 421 1370 1640 1210 --- 1050 815 468 213 293 90 129 30 426 1370 1170 1210 --- 986 867 852 177 251 86 191 31 388 --- 1050 1270 --- 996 --- 675 --- 226 84 --- TOTAL 14990 15535 44031 56547 22935 58565 30783 19380 10837 6982 5647 3768 MEAN 484 518 1420 1824 819 1889 1026 625 361 225 182 126 MAX 910 1370 3410 3220 1190 4530 1620 852 797 320 517 269 MIN 330 272 775 960 652 822 760 466 177 150 84 84 CFSM .76 .82 2.24 2.88 1.29 2.98 1.62 .99 .57 .36 .29 .20 IN. .88 .91 2.58 3.32 1.35 3.44 1.81 1.14 .64 .41 .33 .22 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1913 - 1995, BY WATER YEAR (WY) MEAN 604 937 1100 1103 1084 1945 2451 1386 873 558 508 503 MAX 2657 3795 3151 4490 2790 5291 5207 2892 3143 2302 2509 3543 (WY) 1956 1928 1974 1949 1976 1936 1940 1984 1984 1945 1955 1938 MIN 122 117 131 189 267 669 756 541 277 170 157 126 (WY) 1915 1915 1915 1981 1920 1965 1985 1941 1964 1965 1913 1995 SUMMARY STATISTICS FOR 1994 CALENDAR YEAR FOR 1995 WATER YEAR WATER YEARS 1913 - 1995 ANNUAL TOTAL 411557 290000 ANNUAL MEAN 1128 795 1087 HIGHEST ANNUAL MEAN 1782 1928 LOWEST ANNUAL MEAN 403 1965 HIGHEST DAILY MEAN 6100 Apr 15 4530 Mar 10 23700 Jan 1 1949 LOWEST DAILY MEAN 199 Jul 18 84 Aug 31 24 Oct 15 1914 ANNUAL SEVEN-DAY MINIMUM 240 Jul 15 85 Aug 29 73 Oct 14 1914 INSTANTANEOUS PEAK FLOW 4820 Mar 9 23900 Jan 1 1949 INSTANTANEOUS PEAK STAGE 6.63 Mar 9 a19.40 Jan 1 1949 INSTANTANEOUS LOW FLOW 76 Feb 23 b ANNUAL RUNOFF (CFSM) 1.78 1.25 1.71 ANNUAL RUNOFF (INCHES) 24.15 17.02 23.29 10 PERCENT EXCEEDS 2660 1730 2400 50 PERCENT EXCEEDS 642 592 720 90 PERCENT EXCEEDS 301 154 229 a Present datum, from floodmarks. b Practically no flow at times when power plant was shut down.