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. Routes 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. Telephone telemetry at station. Satellite telemetry at station. REMARKS.--Records good except for periods of estimated daily discharges, which are fair. Slight diurnal fluctuation at low flow. Flow regulated by Thomaston, Hall Meadow Brook and East Branch Detention Reservoirs, and Lake Winchester. 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. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 2,420 ft3/s, June 7, gage height, 5.33 ft; minimum discharge, 27 ft3/s, July 14, gage height, 1.72 ft. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 147 90 e160 e96 e105 645 193 141 122 70 364 42 2 147 106 e130 e95 e100 643 173 139 111 61 393 65 3 140 502 e135 110 e92 323 162 126 138 56 296 70 4 688 586 e135 135 e88 264 256 116 110 96 229 61 5 632 369 e130 343 e85 238 260 111 99 81 160 51 6 356 184 e140 192 e82 222 204 108 241 57 124 42 7 83 157 e240 154 e79 209 174 100 1630 49 132 39 8 40 137 e180 134 e76 222 156 93 1190 44 107 36 9 69 125 e160 121 e75 236 283 88 384 40 93 47 10 105 119 127 209 e74 272 294 146 245 40 160 45 11 167 112 209 505 e90 313 260 282 223 37 113 41 12 157 101 161 304 e95 673 223 168 537 33 289 36 13 134 100 138 211 e85 1040 191 345 842 31 162 50 14 142 98 154 165 420 619 171 447 626 30 173 40 15 138 95 323 e145 595 314 158 255 392 158 152 81 16 121 92 278 e135 281 191 156 179 304 945 150 64 17 111 87 220 e125 189 711 157 143 233 565 121 50 18 122 83 180 e115 164 617 216 199 207 155 96 41 19 124 81 151 e110 165 368 185 459 202 110 90 49 20 134 83 159 e102 130 306 161 572 167 87 77 134 21 177 e95 493 e95 114 268 175 560 136 73 66 67 22 162 e90 280 e90 109 242 315 453 138 82 59 52 23 209 e87 211 e87 125 219 335 291 118 69 59 45 24 213 e84 175 e85 201 202 741 576 101 60 78 45 25 172 e110 147 e82 385 187 237 583 89 54 64 41 26 143 e200 e135 e80 532 188 211 333 83 55 58 50 27 241 e600 e125 e79 479 175 233 243 94 408 53 64 28 270 e340 e110 e78 615 389 207 199 99 804 49 50 29 192 e230 e105 e77 697 440 182 170 87 366 46 43 30 94 e190 e100 e76 --- 265 161 151 82 325 44 39 31 91 --- e98 e110 --- 217 --- 136 --- 494 44 --- TOTAL 5721 5333 5489 4445 6327 11218 6830 7912 9030 5535 4101 1580 MEAN 185 178 177 143 218 362 228 255 301 179 132 52.7 MAX 688 600 493 505 697 1040 741 583 1630 945 393 134 MIN 40 81 98 76 74 175 156 88 82 30 44 36 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2000, BY WATER YEAR (WY) MEAN 130 188 233 240 244 401 387 225 153 81.7 76.7 76.5 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 16.6 13.8 (WY) 1965 1965 1981 1981 1980 1989 1985 1965 1964 1962 1999 1964 e Estimated. HOUSATONIC RIVER BASIN 01206900 NAUGATUCK RIVER AT THOMASTON, CT--Continued SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1961 - 2000 ANNUAL TOTAL 69203.9 73521 ANNUAL MEAN 190 201 203 HIGHEST ANNUAL MEAN 300 1973 LOWEST ANNUAL MEAN 76.6 1965 HIGHEST DAILY MEAN 1830 Sep 20 1630 Jun 7 3550 Mar 10 1979 LOWEST DAILY MEAN 8.9 Aug 5 30 Jul 14 8.4 Sep 14 1964 ANNUAL SEVEN-DAY MINIMUM 10 Aug 2 36 Jul 8 9.8 Sep 21 1964 INSTANTANEOUS PEAK FLOW 2420 Jun 7 5140 Mar 31 1960 INSTANTANEOUS PEAK STAGE 5.33 Jun 7 6.25 Mar 31 1960 INSTANTANEOUS LOW FLOW 27 Jul 14 5.6 Sep 1 1999 10 PERCENT EXCEEDS 402 442 438 50 PERCENT EXCEEDS 114 142 115 90 PERCENT EXCEEDS 16 54 26