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USGS Daily Statistics for Massachusetts

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ICE EFFECTS ON STREAMFLOW

The formation of ice on rivers can cause discharge values to appear unusually high. Display of these erroneous discharge data may result in improper assessment of flow conditions and misuse of the data. For this reason, display of discharge values for streams significantly affected by ice may be disabled from view. Display of discharge data will resume when ice conditions are no longer present. Discharge values for streams minimally affected by ice will continue to be displayed. Flows for streams with these conditions appear to increase during the night and decrease to near-base-line conditions around midday. To estimate the correct discharge for these streams, use the flow rate that corresponds to the bottom of the discharge curve, rather than the peak that corresponds to the top of the curve. Note that this method of estimation is possible only when no surface runoff is occurring. Daily mean discharges for periods of both significant and minimal ice-effect will be estimated and published in the Annual Water-Data Report for the water year in which they occurred.


The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01174500 EAST BRANCH SWIFT RIVER NEAR HARDWICK, MA


Worcester County, Massachusetts
Hydrologic Unit Code 01080204
Latitude  42°23'36", Longitude  72°14'20" NAD27
Drainage area 43.7  square miles
Contributing drainage area 43.7  square miles
Gage datum 504.06 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1936-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 83 78 91 200 120 86 48 30 19 35 54 83
2 87 77 90 201 114 81 47 32 23 35 51 84
3 87 90 94 212 112 78 44 29 21 34 59 82
4 85 99 98 205 112 73 42 29 18 36 63 77
5 81 96 99 206 109 68 40 28 17 37 60 80
6 81 86 109 209 101 71 45 25 17 34 57 85
7 83 86 138 199 96 77 39 24 24 34 56 92
8 84 86 124 182 91 73 34 28 24 34 56 92
9 84 78 133 168 90 66 32 30 22 44 60 84
10 85 73 133 164 92 62 34 33 20 41 65 85
11 83 73 123 162 94 61 33 30 21 38 65 90
12 82 79 125 159 96 60 32 36 29 39 66 94
13 90 77 126 164 94 60 34 35 29 39 69 94
14 86 78 135 163 94 69 38 35 25 38 71 92
15 85 78 136 153 91 66 33 34 25 49 69 93
16 81 84 135 162 92 61 32 28 23 49 65 86
17 77 83 138 175 97 56 32 25 24 48 67 85
18 73 85 148 160 97 53 38 25 29 49 66 97
19 77 88 144 145 95 50 40 38 34 46 61 94
20 82 82 143 140 90 46 38 37 35 47 63 83
21 78 83 146 134 86 44 41 28 77 58 69 84
22 78 90 160 127 82 46 45 26 56 53 72 93
23 82 98 160 130 76 52 41 24 36 47 75 84
24 93 99 156 131 79 53 50 22 31 50 71 86
25 117 104 152 128 83 62 42 20 34 60 72 98
26 122 104 152 123 83 50 32 21 39 61 79 96
27 127 99 163 130 78 46 28 19 46 56 84 90
28 125 95 164 127 73 47 30 22 38 55 82 85
29 102 106 168 127 71 49 32 23 35 58 88 83
30 87   182 122 79 47 35 20 40 61 86 82
31 80   194   82   32 20   58   82