CONNECTICUT RIVER BASIN 01186000 WEST BRANCH FARMINGTON RIVER AT RIVERTON, CT LOCATION.--Lat 4157'46", long 7301'05", Litchfield County, Hydrologic Unit 01080207, on right bank at downstream side of bridge on State Route 20 at Riverton, 0.3 mi upstream from Still River, 2.0 mi downstream from Goodwin Dam of West Branch Reservoir, and at mile 55. DRAINAGE AREA.--131 mi2. PERIOD OF RECORD.--Discharge: August 1955 to current year. Water-quality records: Water Years 1954, 1955, 1975-80. REVISED RECORDS.--WSP 1501: 1956. WSP 1551: 1957. WSP 1701: 1958-59. GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 485.60 ft above sea level. Prior to Mar. 29, 1957, nonrecording gage at same site and datum. Telephone telemetry at station. Satellite telemetry at station. REMARKS.--Records good except for periods of estimated daily discharges, which are fair. Flow regulated by Otis and West Branch Reservoirs and Colebrook River Lake. EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 19, 1955, reached a stage of 21.1 ft, from floodmarks, discharge, 57,200 ft3/s, by slope-area measurement 1.5 mi upstream. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 1,330 ft3/s, June 14, gage height, 6.27 ft; minimum discharge, 72 ft3/s, Sep. 13, 14, gage height, 3.31 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 1 323 376 311 178 123 166 182 156 180 281 343 370 2 315 373 311 179 124 162 181 156 203 279 344 403 3 310 440 310 165 127 155 169 155 212 272 338 400 4 220 395 312 156 124 150 181 154 191 271 331 390 5 154 381 311 166 123 149 176 154 170 303 327 384 6 146 378 292 159 120 178 170 154 298 321 335 377 7 142 372 287 156 120 199 253 152 406 286 254 379 8 200 349 283 154 119 202 285 247 195 267 207 379 9 238 336 217 152 120 206 269 208 339 268 207 359 10 245 336 204 160 120 210 173 153 416 324 207 349 11 320 336 204 174 120 227 170 164 343 357 206 373 12 358 334 201 161 120 311 166 154 728 358 212 386 13 359 334 289 155 119 239 162 157 1110 363 208 79 14 366 331 398 158 138 211 161 161 1240 359 210 218 15 363 335 321 188 143 203 160 141 1250 372 211 398 16 363 379 255 157 135 199 158 133 970 293 299 265 17 360 407 249 e150 126 246 156 129 586 328 356 199 18 359 410 245 e145 125 216 159 136 583 406 373 295 19 354 410 242 e142 123 204 159 158 955 403 385 356 20 394 411 244 e140 120 220 158 154 783 287 382 365 21 416 411 261 e138 122 232 166 146 529 273 394 361 22 376 373 252 e135 122 232 195 152 458 178 412 358 23 352 350 e236 e132 124 228 176 158 388 157 419 254 24 324 349 e225 e130 131 226 165 188 366 312 333 203 25 344 349 e212 e128 150 224 162 194 365 407 409 329 26 398 354 e205 e127 151 225 161 248 375 410 419 398 27 326 392 e195 e127 147 196 164 298 392 403 414 398 28 290 372 e187 e126 201 226 162 292 321 268 409 398 29 291 335 e180 e126 181 207 159 224 283 246 405 324 30 359 313 e195 e124 --- 191 156 183 282 247 406 201 31 389 --- 174 e123 --- 185 --- 181 --- 305 403 --- TOTAL 9754 11021 7808 4611 3818 6425 5314 5440 14917 9604 10158 9948 MEAN 315 367 252 149 132 207 177 175 497 310 328 332 MAX 416 440 398 188 201 311 285 298 1250 410 419 403 MIN 142 313 174 123 119 149 156 129 170 157 206 79 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1956 - 2000, BY WATER YEAR (WY) MEAN 189 254 255 219 215 269 450 303 278 218 229 169 MAX 1080 794 655 597 729 668 1134 673 903 720 509 490 (WY) 1956 1956 1997 1978 1976 1968 1958 1983 1984 1972 1969 1973 MIN 34.2 52.1 89.0 41.7 57.4 106 122 94.3 35.6 15.8 12.3 25.0 (WY) 1969 1965 1965 1981 1977 1989 1985 1985 1957 1957 1957 1967 e Estimated. CONNECTICUT RIVER BASIN 01186000 WEST BRANCH FARMINGTON RIVER AT RIVERTON, CT--Continued SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1956 - 2000 ANNUAL TOTAL 88966 98818 ANNUAL MEAN 244 270 254 HIGHEST ANNUAL MEAN 384 1956 LOWEST ANNUAL MEAN 102 1965 HIGHEST DAILY MEAN 643 May 26 1250 Jun 15 7310 Oct 16 1955 LOWEST DAILY MEAN 51 Sep 14 79 Sep 13 2.7 Oct 5 1960 ANNUAL SEVEN-DAY MINIMUM 65 Sep 9 120 Feb 7 3.8 Oct 1 1960 INSTANTANEOUS PEAK FLOW 1330 Jun 14 10600 Oct 16 1955 INSTANTANEOUS PEAK STAGE 6.27 Jun 14 12.47 Oct 16 1955 INSTANTANEOUS LOW FLOW 72 Sep 13 .90 Jul 21 1960 10 PERCENT EXCEEDS 365 399 460 50 PERCENT EXCEEDS 241 240 202 90 PERCENT EXCEEDS 115 137 67