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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 01170100 GREEN RIVER NEAR COLRAIN, MA


Franklin County, Massachusetts
Hydrologic Unit Code 01080203
Latitude  42°42'12", Longitude  72°40'16" NAD27
Drainage area 41.4  square miles
Contributing drainage area 41.4  square miles
Gage datum 434.51 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 1967-10-01 -> 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 90 66 82 280 173 92 72 39 21 48 77 117
2 91 79 88 270 168 84 73 44 30 46 90 124
3 83 92 90 254 158 85 72 33 25 39 92 107
4 77 94 99 275 158 85 64 35 25 49 69 102
5 84 89 92 302 135 73 54 36 24 46 74 96
6 84 81 109 267 144 103 46 32 41 49 81 88
7 73 74 124 246 126 105 44 39 44 47 70 97
8 83 68 118 237 115 85 43 43 30 57 89 89
9 94 62 120 219 123 70 47 39 33 86 116 82
10 88 64 118 257 123 71 59 50 27 49 95 92
11 84 81 137 260 128 74 40 43 32 43 85 105
12 93 76 131 252 126 71 46 47 30 54 101 108
13 91 67 145 259 132 86 47 40 32 47 94 106
14 93 64 146 251 128 99 50 39 28 52 87 113
15 85 66 144 249 114 76 40 36 26 70 88 102
16 76 72 137 282 113 74 56 34 32 58 84 90
17 70 70 166 272 117 70 50 28 35 72 94 106
18 80 79 162 240 113 60 58 33 45 59 81 126
19 94 74 176 232 118 66 41 34 38 57 73 90
20 83 92 173 234 118 58 34 29 33 91 97 77
21 73 85 171 224 113 50 33 30 30 96 92 125
22 71 89 195 217 94 49 35 30 30 69 83 108
23 74 95 170 238 85 59 41 31 38 76 85 117
24 81 104 160 240 108 57 38 29 39 70 76 119
25 85 127 171 205 117 54 35 25 43 76 84 136
26 103 107 182 182 95 61 37 22 43 78 99 108
27 115 90 205 188 91 56 37 20 54 77 113 107
28 93 87 222 182 81 70 41 85 51 93 100 96
29 75 110 238 174 98 75 55 36 48 96 105 90
30 69   266 160 104 101 53 34 54 102 104 90
31 75   284   101   39 24   76   84