HOUSATONIC RIVER BASIN 01206900 NAUGATUCK RIVER AT THOMASTON, CT LOCATION.--Lat 4140'25", long 7304'12", Litchfield County, Hydrologic Unit 01100005, on left bank at downstream side of bridge on U.S. Highways 6 and 202 at Thomaston, 1.5 mi downstream from Thomaston Reservoir, 2.5 mi upstream from Branch Brook, and at mile 29.5. DRAINAGE AREA.--99.8 mi2. PERIOD OF RECORD.--October 1959 to current year. REVISED RECORDS.--WDR CT-76-1: 1975. WDR CT-83-1:Drainage area. GAGE.--Water-stage recorder. Datum of gage is 354.39 ft above sea level. REMARKS.--Records good except those periods of estimated record, which are poor. Slight diurnal fluctuation at low flow. Flow regulated by Thomaston, Hall Meadow Brook and East Branch Detention Reservoirs, and Lake Winchester. Telephone gage-height telemeter at this station. EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 19, 1955, reached a stage of 27.0 ft, from floodmarks by Corps of Engineers, discharge, 53,400 ft3/s, from indirect measurements of peak flow on Naugatuck River, 71.9 mi2, and Leadmine Brook, 24.0 mi2, adjusted for intervening drainage area. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 209 171 252 e230 196 170 934 220 113 e36 19 95 2 188 216 283 275 189 211 777 223 118 e65 19 89 3 196 194 1110 194 183 215 619 363 120 e54 25 82 4 155 173 2150 229 172 189 726 1050 105 e47 41 77 5 83 134 1750 247 569 181 879 597 65 e40 83 72 6 80 124 650 250 581 428 847 443 62 e44 74 40 7 77 135 541 219 285 290 736 520 58 e42 36 36 8 74 188 538 191 218 217 519 344 56 e40 27 35 9 576 88 472 165 187 188 376 294 52 133 28 29 10 744 720 414 152 164 208 304 282 50 317 29 26 11 354 1670 381 138 151 218 266 254 46 85 24 37 12 266 1530 515 123 143 191 296 220 43 59 23 173 13 227 674 702 e110 135 165 695 200 40 51 89 67 14 206 311 702 e106 138 177 460 193 38 42 179 47 15 163 304 805 114 171 535 321 176 34 51 57 38 16 133 274 745 312 157 316 274 164 32 75 49 33 17 137 249 774 323 139 215 251 149 30 48 44 32 18 103 219 1040 203 138 195 385 144 48 37 118 28 19 109 230 864 e175 187 182 496 191 89 31 68 28 20 194 245 866 e150 294 185 461 348 49 27 43 27 21 946 204 642 142 225 184 396 235 39 27 143 27 22 2150 198 443 134 385 223 340 197 33 90 113 24 23 2620 180 414 161 351 209 285 175 37 48 74 24 24 2440 143 427 142 227 167 248 159 30 37 52 24 25 1750 138 719 484 173 152 223 164 34 39 42 24 26 510 446 471 561 157 473 204 168 e42 31 37 24 27 384 774 401 289 172 423 185 144 e60 28 34 24 28 383 394 370 533 195 290 408 134 e44 38 127 23 29 322 261 367 588 --- 275 375 125 e36 27 114 70 30 249 253 374 240 --- 309 260 120 e33 22 114 51 31 247 --- 322 200 --- 587 --- 117 --- 20 94 --- TOTAL 16275 10840 20504 7380 6282 7968 13546 8113 1636 1731 2019 1406 MEAN 525 361 661 238 224 257 452 262 54.5 55.8 65.1 46.9 MAX 2620 1670 2150 588 581 587 934 1050 120 317 179 173 MIN 74 88 252 106 135 152 185 117 30 20 19 23 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 1997, BY WATER YEAR (WY) MEAN 132 191 241 237 243 399 401 222 152 79.2 78.2 74.7 MAX 525 510 709 757 776 785 966 721 658 331 429 472 (WY) 1997 1996 1974 1979 1981 1979 1987 1989 1982 1972 1969 1975 MIN 21.1 23.9 51.4 31.1 57.0 158 103 75.0 33.8 18.4 18.5 13.8 (WY) 1965 1965 1981 1981 1980 1989 1985 1965 1964 1962 1964 1964 e Estimated. SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1961 - 1997 ANNUAL TOTAL 126684 97700 ANNUAL MEAN 346 268 204 HIGHEST ANNUAL MEAN 300 1973 LOWEST ANNUAL MEAN 76.6 1965 HIGHEST DAILY MEAN 2620 Oct 23 2620 Oct 23 3550 Mar 10 1979 LOWEST DAILY MEAN 22 Sep 4 19 Aug 1 8.4 Sep 14 1964 ANNUAL SEVEN-DAY MINIMUM 26 Aug 31 24 Sep 22 9.8 Sep 21 1964 INSTANTANEOUS PEAK FLOW 2940 Oct 23 5140 Mar 31 1960 INSTANTANEOUS PEAK STAGE 5.72 Oct 23 6.25 Mar 31 1960 INSTANTANEOUS LOW FLOW a16 Aug 1 6.6 Sep 20 1964 10 PERCENT EXCEEDS 766 587 440 50 PERCENT EXCEEDS 221 179 115 90 PERCENT EXCEEDS 51 34 27 a Also occurred on Aug. 3.