HOUSATONIC RIVER BASIN 01200000 TENMILE RIVER NEAR GAYLORDSVILLE, CONN. LOCATION.--Lat 41o39'32", long 73o31'44", Dutchess County, New York, Hydrologic Unit 01100005, on right bank 0.1 mi downstream from Deuel Hollow Brook, 1.2 mi upstream from New York-Connecticut State line, 1.7 mi upstream from mouth, and 2.5 mi northwest of Gaylordsville. DRAINAGE AREA.--203 mi2. PERIOD OF RECORD.--Discharge: October 1929 to September 1987, October 1991 to current year. Monthly discharge only for period October to December 1929, published in WSP 1301. Partial record site: October 1987 to September 1991. Water-quality records: Water years 1959, 1968, 1973-75, 1980. Daily water temperature: Water year 1959. Daily specific conductance: Water years 1958-59. Daily pH: Water years 1958-59. Daily iron: Water years 1958-59. REVISED RECORDS.--WSP 1201: 1939. WSP 1701: 1955-56, 1957(M), 1958-59. WSP 1901: Drainage area. GAGE.--Water-stage recorder. Datum of gage is 304.4 ft above sea level, (levels by Connecticut Light and Power Company). REMARKS.--Records good except for periods of estimated record, which are poor. Infrequent regulation at low flow. DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 21 550 329 e137 1040 537 322 1160 248 100 350 77 2 20 524 345 e134 e850 506 603 942 228 91 384 72 3 18 537 320 e131 e710 481 566 790 263 115 352 65 4 18 500 325 e129 e600 417 467 772 492 234 301 61 5 26 417 311 e126 e525 437 429 727 445 184 264 60 6 288 367 324 e123 e480 624 403 670 361 142 237 58 7 232 349 317 e120 e455 613 392 660 288 117 216 64 8 128 494 282 e118 e425 454 470 574 243 98 200 77 9 93 427 262 e116 519 e430 497 521 217 96 188 78 10 75 367 262 e114 541 e410 518 512 198 123 201 69 11 61 353 248 e112 519 e390 520 585 191 101 178 68 12 53 1780 237 e110 501 e370 479 1140 178 82 160 66 13 46 1860 230 e135 366 452 525 981 161 520 177 66 14 44 1280 229 e177 e300 492 739 769 148 1090 182 73 15 68 1600 246 e170 e285 603 767 670 137 709 158 76 16 87 1350 237 e166 e270 862 1080 625 126 775 142 69 17 84 1040 234 e170 e260 717 1710 667 113 691 140 79 18 68 877 225 e195 e250 659 1360 693 133 566 133 305 19 59 885 219 1410 e242 621 1080 790 144 449 118 384 20 54 782 206 4900 e240 706 911 626 178 510 106 212 21 235 688 e200 3300 752 712 796 564 197 367 99 171 22 850 615 e190 e2500 1060 649 691 664 173 293 94 171 23 486 551 e180 e1800 1100 584 625 539 153 288 87 421 24 353 503 e175 1480 1010 528 781 482 132 327 121 312 25 286 453 e170 2510 995 488 651 426 117 338 178 273 26 232 422 e165 1730 840 458 580 387 105 1100 122 235 27 196 403 e160 2430 743 422 615 359 91 822 100 201 28 1690 383 e155 4390 699 388 532 337 87 543 96 182 29 2010 357 e150 2550 639 379 576 320 83 439 98 273 30 938 343 e145 1800 --- 365 914 292 88 412 88 260 31 675 --- e140 1380 --- 338 --- 270 --- 368 81 --- TOTAL 9494 21057 7218 34663 17216 16092 20599 19514 5718 12090 5351 4578 MEAN 306 702 233 1118 594 519 687 629 191 390 173 153 MAX 2010 1860 345 4900 1100 862 1710 1160 492 1100 384 421 MIN 18 343 140 110 240 338 322 270 83 82 81 58 CFSM 1.51 3.46 1.15 5.51 2.92 2.56 3.38 3.10 .94 1.92 .85 .75 IN. 1.74 3.86 1.32 6.35 3.15 2.95 3.77 3.58 1.05 2.22 .98 .84 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 1996, BY WATER YEAR (WY) MEAN 142 246 323 371 381 645 621 351 248 152 115 108 MAX 1222 1067 896 1118 873 1690 1366 779 1078 998 1007 1082 (WY) 1956 1956 1974 1996 1976 1977 1983 1945 1984 1938 1955 1938 MIN 15.7 21.5 56.4 38.1 94.7 216 197 124 48.2 17.8 13.9 10.8 (WY) 1958 1965 1965 1981 1936 1965 1966 1941 1965 1957 1993 1957 SUMMARY STATISTICS FOR 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1931 - 1996 ANNUAL TOTAL 102570 173590 ANNUAL MEAN 281 474 308 HIGHEST ANNUAL MEAN 497 1938 LOWEST ANNUAL MEAN 90.7 1965 HIGHEST DAILY MEAN 2010 Oct 29 4900 Jan 20 10700 Aug 19 1955 LOWEST DAILY MEAN 11 Sep 6 18 Oct 3 7.0 Oct 7 1957 ANNUAL SEVEN-DAY MINIMUM 11 Sep 6 62 Oct 10 8.0 Oct 1 1957 INSTANTANEOUS PEAK FLOW 5230 Jan 20 a17400 Aug 19 1955 INSTANTANEOUS PEAK STAGE 8.15 Jan 20 b14.90 Aug 19 1955 INSTANTANEOUS LOW FLOW c17 Oct 3 5.0 Sep 8 1957 ANNUAL RUNOFF (CFSM) 1.38 2.34 1.52 ANNUAL RUNOFF (INCHES) 18.80 31.81 20.61 10 PERCENT EXCEEDS 641 939 680 50 PERCENT EXCEEDS 221 338 195 90 PERCENT EXCEEDS 20 87 36 a From rating curve extended above 9,800 ft3/s. b From high-water marks. c Also occurred on Oct. 4. e Estimated.