ST. LAWRENCE RIVER BASIN
04282650 LITTLE OTTER CREEK AT FERRISBURG, VT
LOCATION.--Lat 44°11'51", long 73°14'58", Addison County, Hydrologic Unit 02010002, on left bank, downstream side
of highway bridge on Route 7, 0.5 mi south of Ferrisburg, 2.2 mi north of Vergennes, 2.6 mi downstream of
Mud Creek.
DRAINAGE AREA.-- 57.1 mi².
PERIOD OF RECORD.--Discharge records: March 1990 to current year.
GAGE.--Water-stage recorder. Elevation of gage is 145 ft above sea level, from topographic map. Prior to
October 23, 1990, nonrecording gage at same site and datum.
REMARKS.--Records good except those for estimated daily discharges, which are fair.
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 500 ft³/s and maximum (*):
Discharge Gage height Discharge Gage height
Date Time (ft³/s) (ft) Date Time (ft³/s) (ft)
Dec. 2 unknown * 1,630 b 4.65 Mar. 30 0345 865 3.71
Feb. 22 0815 Ice jam * 5.46
Minimum discharge, 2.3 ft³/s, September 13.
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 9.3 12 e140 e52 e22 266 451 61 24 3.3 5.1 10
2 6.6 11 e1100 e45 e21 189 319 78 33 2.8 4.6 9.3
3 5.7 10 e1400 e43 e20 162 247 73 25 2.7 5.1 8.3
4 4.9 e9.5 946 e41 e20 118 212 87 19 3.3 4.9 7.9
5 4.6 e9.3 517 e42 e19 88 190 77 15 3.6 4.3 7.1
6 4.5 e9.0 243 e45 e19 46 229 94 12 3.5 6.4 5.8
7 4.6 e9.0 130 e39 e19 e40 247 292 10 3.4 6.3 5.3
8 4.6 e9.6 102 e36 e18 e36 198 278 9.1 4.2 4.8 5.3
9 5.1 e345 101 e33 e18 e35 125 145 8.3 6.2 4.0 5.1
10 9.6 e255 88 e32 e18 e34 88 111 7.5 18 3.3 4.3
11 16 e100 76 e32 e17 e33 74 103 6.9 12 2.9 3.8
12 14 e60 69 e31 e17 e32 65 84 6.1 6.9 5.9 4.1
13 10 e44 76 e31 e16 e31 66 74 6.4 4.6 17 3.2
14 8.4 e33 102 e30 e16 e30 64 62 6.5 4.1 31 3.5
15 7.6 e28 156 e28 e16 e29 54 63 5.9 5.0 30 4.5
16 6.5 e34 130 e28 e15 e28 47 72 5.3 9.3 16 7.7
17 5.8 e24 99 e27 e15 e27 43 66 4.8 13 8.8 4.4
18 5.5 e24 81 e27 e17 e27 45 57 5.9 31 6.1 3.7
19 5.5 e80 79 e26 e35 e26 79 54 11 19 5.0 4.7
20 6.0 e135 79 e26 e75 e26 161 56 11 9.9 4.3 3.6
21 10 e96 e78 e25 e100 e25 225 48 8.0 7.1 4.7 3.4
22 23 e73 79 e24 e390 e25 176 44 6.7 5.9 15 3.5
23 34 e55 48 e33 e230 e24 108 40 7.7 5.1 22 3.3
24 34 e43 122 e27 e140 e23 79 36 7.0 5.2 19 3.0
25 35 e40 216 e26 e95 e23 66 31 6.1 5.7 11 2.8
26 25 e33 226 e25 e78 e24 56 28 5.4 6.3 8.2 2.8
27 21 e34 199 e25 e110 e28 47 24 4.8 6.1 6.9 2.8
28 19 e31 92 e24 287 e120 61 21 4.3 6.3 10 2.9
29 17 e29 89 e24 --- e515 72 18 3.8 6.4 23 4.4
30 15 e27 e80 e23 --- 831 66 16 3.6 6.1 17 13
31 14 --- e60 e22 --- 693 --- 17 --- 5.8 12 ---
TOTAL 391.8 1702.4 7003 972 1863 3634 3960 2310 290.1 231.8 324.6 153.5
MEAN 12.6 56.7 226 31.4 66.5 117 132 74.5 9.67 7.48 10.5 5.12
MAX 35 345 1400 52 390 831 451 292 33 31 31 13
MIN 4.5 9.0 48 22 15 23 43 16 3.6 2.7 2.9 2.8
CFSM .22 .99 3.96 .55 1.17 2.05 2.31 1.31 .17 .13 .18 .09
IN. .26 1.11 4.56 .63 1.21 2.37 2.58 1.50 .19 .15 .21 .10
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 1997, BY WATER YEAR (WY)
MEAN 62.6 79.6 77.0 73.1 38.1 104 164 70.5 26.0 14.1 24.4 12.1
MAX 178 174 226 259 69.4 193 332 203 81.3 52.6 107 36.0
(WY) 1991 1991 1997 1996 1996 1990 1993 1996 1996 1996 1990 1991
MIN 5.73 19.2 24.2 22.0 18.0 35.6 34.8 15.3 4.16 3.18 5.60 5.12
(WY) 1995 1995 1996 1994 1992 1996 1995 1995 1995 1995 1993 1997
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1990 - 1997
ANNUAL TOTAL 36816.3 22836.2
ANNUAL MEAN 101 62.6 60.0
HIGHEST ANNUAL MEAN 103 1996
LOWEST ANNUAL MEAN 28.7 1995
HIGHEST DAILY MEAN 1490 Jan 20 e 1400 Dec 3 e 1490 Jan 20 1996
LOWEST DAILY MEAN 3.2 Sep 24 2.7 Jul 3 1.3 Sep 4 1995
ANNUAL SEVEN-DAY MINIMUM 3.8 Sep 21 3.0 Sep 22 1.5 Sep 1 1995
INSTANTANEOUS PEAK FLOW ab 1630 Dec 2 a 2210 Jan 20 1996
INSTANTANEOUS PEAK STAGE c 5.46 Feb 22 5.17 Jan 20 1996
INSTANTANEOUS LOW FLOW 2.5 Jul 3 1.1 Sep 4 1995
ANNUAL RUNOFF (CFSM) 1.76 1.10 1.05
ANNUAL RUNOFF (INCHES) 23.99 14.88 14.28
10 PERCENT EXCEEDS 254 137 153
50 PERCENT EXCEEDS 33 24 24
90 PERCENT EXCEEDS 6.1 4.6 5.3
a From rating curve extended above 920 ft³/s.
b From crest-stage gage.
c Ice jam.
e Estimated.
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