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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 01100627 SHAWSHEEN RIVER AT BALMORAL STREET AT ANDOVER, MA


Essex County, Massachusetts
Hydrologic Unit Code 01070006
Latitude  42°40'17", Longitude  71°08'59" NAD27
Drainage area 72.8  square miles
Gage datum 34.20 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 2006-10-01 -> 2022-09-30)

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
1 154 115 239 374 201 96 91 58 55 74 157 145
2 155 115 232 333 191 98 99 58 70 70 142 144
3 145 110 219 290 175 98 92 57 79 68 126 156
4 146 107 223 272 161 97 106 53 88 74 112 155
5 145 107 215 274 155 96 108 49 68 68 110 149
6 136 113 208 274 153 100 93 45 55 69 107 143
7 128 127 219 277 154 102 81 44 69 77 97 141
8 126 142 236 268 146 108 71 49 74 67 96 149
9 126 140 251 239 137 101 80 50 87 57 97 169
10 128 134 257 216 138 101 90 63 85 51 104 201
11 134 126 234 200 135 97 97 60 77 49 104 203
12 146 127 229 189 129 103 107 61 78 55 106 225
13 159 137 238 184 116 106 99 55 77 57 116 251
14 163 142 268 179 107 118 94 49 64 66 128 264
15 164 149 341 180 99 115 94 47 58 77 142 218
16 162 147 400 213 104 112 77 48 51 72 157 187
17 147 138 368 265 117 99 61 45 43 80 165 165
18 141 141 296 300 125 84 56 46 47 75 152 144
19 139 154 244 272 136 81 57 46 48 74 144 126
20 138 169 228 214 132 76 58 43 47 78 136 116
21 124 158 219 191 127 78 57 46 45 77 125 108
22 115 146 211 181 117 81 52 57 42 81 114 109
23 114 142 210 198 102 89 61 53 37 95 116 121
24 120 157 213 208 92 88 93 51 37 91 124 138
25 130 193 213 206 87 91 110 52 36 90 142 160
26 166 230 203 182 87 87 138 52 42 94 157 170
27 194 253 200 175 87 79 126 47 52 96 168 190
28 174 244 198 179 87 82 98 51 63 119 171 187
29 152 197 208 192 88 81 76 55 80 129 166 174
30 137   246 194 89 83 66 60 84 145 150 173
31 123   323   96   62 62   158   162