THAMES RIVER BASIN 01122500 SHETUCKET RIVER NEAR WILLIMANTIC, CT LOCATION.--Lat 41×42'01", long 72×10'57", Windham County, Hydrologic Unit 01100002, on right bank at downstream side of Bingham Bridge on Plains Road, 500 ft upstream from Penn. Central Co. railroad bridge, 500 ft downstream from Potash Brook, 1.3 mi downstream from confluence of Willimantic and Natchaug Rivers, 1.5 mi southeast of Willimantic, and 17 mi upstream from mouth. DRAINAGE AREA.--404 mi2. PERIOD OF RECORD.--Discharge: April 1904 to December 1905, October 1919 to September 1921, September 1928 to current year. Published as “at South Windham” October 1919 to September 1921, September 1928 to September 1933. Monthly discharge only for some periods, published in WSP 1301. Water-quality records: Water years 1957, 1968-74. Daily water temperature: Water year 1957. Daily specific conductance: Water year 1957. Daily pH: Water year 1957. Daily iron: Water year 1957. REVISED RECORDS.--WSP 781: l934(M). WSP 801: 1935. WSP 1201: 1905(M), 1920-2l. WDR CT-83-1: Drainage area. GAGE.--Water-stage recorder since Dec. 5, 1933. Datum of gage is 131.40 ft above sea level (levels by Corps of Engineers). Apr. 4, 1904 to Dec. 31, 1905, nonrecording gage at present site and about the same datum. October 1919 to Sept.30, 1921, and Sept. 1, 1928 to Sept. 30, 1933, water-stage recorder at site 1.5 mi downstream at different datum. Telephone telemetry at station. Satellite telemetry at station. REMARKS.--Records good except those for periods with ice effect, which are fair. Flow regulated by mills and flood detention reservoirs on Willimantic River, by pumping for municipal water supply of city of Willimantic on the Natchaug River, and by Mansfield Hollow Lake flood-control reservoir. 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 1 123 218 427 e170 e800 3210 1070 332 276 95 57 39 2 134 221 394 e160 e1190 3400 935 297 222 105 52 38 3 112 207 377 661 4360 2400 895 246 210 138 49 37 4 100 199 349 1860 3910 4230 849 283 198 124 41 38 5 93 195 198 e1000 3250 4780 720 358 186 160 42 37 6 86 188 203 e750 1960 3200 690 449 177 116 45 41 7 83 186 200 e600 1280 e2100 673 476 160 102 46 54 8 71 180 202 e550 1350 e1520 649 471 111 95 51 74 9 679 178 234 1000 1180 e1300 614 503 104 79 48 74 10 640 199 244 1590 1100 e1200 628 458 103 74 46 131 11 782 255 236 1040 1040 1120 570 420 98 71 45 209 12 557 337 233 e800 1010 1080 562 381 94 65 47 129 13 433 273 233 e700 1220 1080 555 351 93 64 46 92 14 388 244 228 605 1140 1140 514 316 94 60 61 77 15 693 238 221 936 996 1240 487 258 104 58 66 93 16 750 220 217 2250 874 1290 481 255 97 56 62 654 17 641 221 225 1730 702 1510 580 243 94 55 58 2830 18 502 234 265 1830 1010 1550 581 240 91 62 54 1740 19 423 224 254 3940 1960 1450 513 312 91 135 49 859 20 426 212 241 3140 e1400 1280 527 947 306 139 46 495 21 399 218 233 2620 e1000 1170 576 947 84 107 68 342 22 233 218 236 2340 e650 2950 558 718 79 84 53 271 23 225 208 239 1580 e500 4360 612 617 76 77 51 242 24 226 202 e215 2240 e450 3170 702 810 73 70 48 208 25 222 191 e195 3900 488 2000 618 1130 72 78 46 186 26 218 229 e185 3310 543 1450 574 825 69 87 51 175 27 214 530 e175 2240 739 1420 532 687 67 73 52 165 28 217 411 e170 1560 960 1570 516 596 66 65 51 162 29 231 395 215 e1150 --- 1600 471 433 65 60 48 156 30 244 444 e195 e950 --- 1430 368 393 67 59 43 218 31 229 --- e180 e850 --- 1290 --- 362 --- 58 43 --- TOTAL 10374 7475 7419 48052 37062 62490 18620 15114 3627 2671 1565 9866 MEAN 335 249 239 1550 1324 2016 621 488 121 86.2 50.5 329 MAX 782 530 427 3940 4360 4780 1070 1130 306 160 68 2830 MIN 71 178 170 160 450 1080 368 240 65 55 41 37 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1929 - 1999, BY WATER YEAR (WY) MEAN 383 634 825 915 923 1428 1339 848 545 269 243 294 MAX 2246 2156 2667 2945 2246 3949 2943 1814 2911 1755 2114 3571 (WY) 1956 1956 1997 1979 1970 1936 1987 1989 1982 1938 1955 1938 MIN 49.4 85.0 170 132 236 628 454 319 110 48.6 44.5 45.0 (WY) 1958 1932 1931 1981 1980 1989 1985 1957 1957 1957 1957 1957 e Estimated. THAMES RIVER BASIN 01122500 SHETUCKET RIVER NEAR WILLIMANTIC, CT—Continued SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1929 - 1999 ANNUAL TOTAL 315146 224335 ANNUAL MEAN 863 615 719 HIGHEST ANNUAL MEAN 1243 1938 LOWEST ANNUAL MEAN 337 1965 HIGHEST DAILY MEAN 8120 Mar 10 4780 Mar 5 35500 Sep 21 1938 LOWEST DAILY MEAN 65 Sep 16 37 Sep 3 19 Aug 22 1949 ANNUAL SEVEN-DAY MINIMUM 79 Sep 13 39 Aug 31 31 Sep 7 1995 INSTANTANEOUS PEAK FLOW 5990 Mar 4 a52200 Sep 21 1938 INSTANTANEOUS PEAK STAGE 9.17 Mar 4 b27.60 Sep 21 1938 INSTANTANEOUS LOW FLOW 33 Sep 3 15 Aug 29 1949 10 PERCENT EXCEEDS 2080 1530 1590 50 PERCENT EXCEEDS 524 244 467 90 PERCENT EXCEEDS 114 58 102 a From rating curve extended above 11,000 ft3/s on basis of computation of peak flow over Scotland and Baltic Dams, 5 and 9 mi downstream, respectively, adjusted for flow from intervening area. b From floodmarks.