CONNECTICUT RIVER BASIN
01160350 ASHUELOT RIVER AT WEST SWANZEY, NH
LOCATION.--Lat 42°52'16", long 72°19'42", Cheshire County, Hydrologic Unit 01080201, on left bank, 150 ft downstream of
California/Main Street bridge in West Swanzey, 4.5 mi downstream from South Branch Ashuelot River, 5 mi southwest
of Keene, and 14.2 mi upstream from mouth.
DRAINAGE AREA.--316 mi².
PERIOD OF RECORD.--Discharge records: April 1994 to current year.
GAGE.--Water-stage recorder and crest stage gage. Elevation of gage is 452 ft above sea level, from topographic map.
REMARKS.--Records fair. Flow regulated by Surry Mountain Lake 20 mi upstream since 1942 and by Otter Brook Lake 16 mi
upstream on Otter Brook since 1958 (Reservoirs in Connecticut River Basin). Some regulation by small hydro plants
upstream.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 3,490 ft³/s, December 3, gage height, 3.70 ft; minimum daily discharge,
40 ft³/s, August 2,3.
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
1 148 399 559 e1340 315 1010 1930 1370 266 e60 e42 67
2 122 343 1720 e1060 301 933 1880 1240 261 e55 e40 68
3 110 320 3340 975 296 942 1780 1170 e245 e64 e40 e69
4 110 298 2990 940 283 870 1600 1420 e227 e125 e44 e71
5 89 280 2550 909 368 779 1630 1500 e216 e152 e50 e75
6 79 249 2170 989 499 960 1750 1280 e198 e151 54 e70
7 73 266 1730 969 471 998 1930 1310 e187 e120 e49 e65
8 71 302 1560 e810 399 799 2440 1190 e174 e130 e46 e69
9 159 1070 1460 e687 342 687 2380 1010 e167 e165 e44 e67
10 291 e1970 1070 589 323 634 2070 902 e158 e635 e42 e64
11 287 e2120 890 544 314 556 1790 839 e147 e425 e43 60
12 235 e1790 853 e561 264 516 1410 753 e136 e278 e49 e69
13 188 e1480 1070 e475 231 424 1350 657 e130 e210 60 e80
14 165 e1190 1120 384 200 e288 1440 577 e125 e173 99 e85
15 155 886 1080 359 223 445 1360 550 e118 e153 83 e80
16 128 691 1090 443 207 e420 1260 637 e106 e138 67 e79
17 114 633 1200 e498 203 359 1200 669 e100 129 89 e78
18 110 592 1740 e523 212 365 1290 602 e106 126 112 e73
19 141 560 2490 417 221 346 1760 553 e130 114 96 e68
20 215 535 2600 355 326 345 2630 835 e136 103 75 e71
21 e819 490 2290 321 420 328 2570 933 e118 96 80 e80
22 1610 468 1890 302 932 413 2230 757 e104 88 110 e77
23 1750 441 1590 334 1140 420 2010 647 e93 80 116 e73
24 1710 402 1350 285 1100 323 1870 563 e87 73 110 e67
25 1590 344 1810 362 e1320 310 1730 503 e85 70 98 e63
26 1340 493 2150 449 1200 636 1590 465 e85 63 84 e60
27 1080 977 2150 373 1040 1010 1410 415 e82 58 75 e59
28 683 824 1940 354 1030 1120 1420 365 e78 57 65 e62
29 550 627 1740 352 --- 1320 1690 329 e75 52 83 e67
30 474 509 1660 322 --- 1550 1600 298 e69 e48 90 e70
31 434 --- 1550 322 --- 1830 --- 283 --- e46 76 ---
TOTAL 15030 21549 53402 17603 14180 21936 53000 24622 4209 4237 2211 2106
MEAN 485 718 1723 568 506 708 1767 794 140 137 71.3 70.2
MAX 1750 2120 3340 1340 1320 1830 2630 1500 266 635 116 85
MIN 71 249 559 285 200 288 1200 283 69 46 40 59
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1994 - 1997, BY WATER YEAR (WY)
MEAN 469 806 881 847 641 799 1556 908 195 193 131 93.4
MAX 761 1539 1723 1076 1007 973 2353 1511 300 362 214 140
(WY) 1996 1996 1997 1996 1996 1995 1994 1996 1996 1996 1995 1996
MIN 161 160 325 568 396 708 518 316 140 110 71.3 47.8
(WY) 1995 1995 1996 1997 1995 1997 1995 1995 1997 1995 1997 1995
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1994 - 1997
ANNUAL TOTAL 295987 234085
ANNUAL MEAN 809 641 601
HIGHEST ANNUAL MEAN 781 1996
LOWEST ANNUAL MEAN 380 1995
HIGHEST DAILY MEAN 3340 Dec 3 3340 Dec 3 3340 Dec 3 1996
LOWEST DAILY MEAN 31 Sep 5 ae 40 Aug 2 28 Sep 7 1995
ANNUAL SEVEN-DAY MINIMUM 35 Sep 1 44 Jul 30 29 Sep 1 1995
INSTANTANEOUS PEAK FLOW 3490 Dec 3 3620 Apr 17 1996
INSTANTANEOUS PEAK STAGE 3.70 Dec 3 b 3.81 Jan 26 1996
10 PERCENT EXCEEDS 2120 1720 1730
50 PERCENT EXCEEDS 489 359 320
90 PERCENT EXCEEDS 79 68 65
a Also occurred on August 3.
b Ice affected
e Estimated.
Back to station selections
Back to District Home Page
To WRD National Home Page
To USGS National Home Page
Comments and suggestions can be sent to
NH-VT Webmaster