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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 01109730 BLACKSTONE RIVER, W. MAIN ST., AT MILLBURY, MA


Worcester County, Massachusetts
Hydrologic Unit Code 01090003
Latitude  42°11'20", Longitude  71°45'56" NAD27
Drainage area 71.4  square miles
Gage datum 379.35 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 2001-10-01 -> 2024-09-30)

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
1 212 166 203 375 252 157 111 96 93 132 194 221
2 206 165 259 361 219 174 179 111 188 118 180 196
3 196 168 233 359 205 169 150 87 110 115 223 187
4 211 200 210 345 201 159 128 97 89 126 187 166
5 209 225 223 310 194 144 109 89 88 120 179 165
6 205 192 208 281 182 152 119 82 118 115 187 172
7 194 216 278 268 177 177 112 93 172 105 174 182
8 189 196 275 266 176 204 123 109 186 114 168 197
9 183 169 261 246 166 171 173 98 145 136 172 185
10 246 172 215 224 171 152 166 124 118 99 179 209
11 217 182 242 215 151 170 133 105 120 118 159 256
12 228 174 241 226 153 163 137 88 106 138 163 315
13 263 201 255 263 162 153 110 95 111 129 186 233
14 277 195 334 278 191 193 119 102 100 133 176 234
15 247 181 317 254 180 159 101 126 95 327 162 216
16 230 184 289 384 199 132 115 126 95 200 171 209
17 214 181 252 334 197 134 148 89 85 197 210 225
18 227 228 237 263 168 137 188 104 146 150 171 300
19 223 204 233 238 183 141 139 125 126 143 155 234
20 204 178 230 223 167 119 106 101 94 142 167 205
21 178 169 237 229 154 123 103 94 85 159 143 217
22 163 177 234 221 143 146 112 104 89 159 164 209
23 179 201 250 280 131 170 138 108 103 162 187 249
24 218 207 254 251 140 136 212 91 99 145 189 258
25 251 252 232 216 142 130 133 95 104 200 178 292
26 255 229 216 224 188 126 113 89 117 233 165 265
27 216 227 228 255 167 121 112 92 116 209 196 241
28 192 213 244 231 153 152 116 164 131 225 173 233
29 182 174 309 218 160 124 109 133 149 237 161 222
30 174   420 213 147 107 104 97 149 270 210 217
31 172   408   140   102 84   222   203