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USGS Surface-Water Daily Statistics for Virginia

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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 02056900 BLACKWATER RIVER NEAR ROCKY MOUNT, VA


Franklin County, Virginia
Hydrologic Unit Code 03010101
Latitude  37°02'42", Longitude  79°50'40" NAD27
Drainage area 115  square miles
Gage datum 875.96 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 1976-10-01 -> 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
1 140 130 219 184 158 113 85 74 68 125 97 171
2 139 139 188 191 155 118 98 80 62 115 104 141
3 141 165 180 200 145 119 111 80 59 102 105 132
4 177 209 251 183 152 125 124 70 68 93 163 122
5 135 162 232 195 185 235 147 60 94 82 203 143
6 115 169 224 171 170 155 102 78 211 72 112 119
7 131 169 196 165 167 161 82 66 179 75 113 151
8 153 139 173 157 155 205 84 60 184 125 116 125
9 155 136 176 222 148 229 85 100 98 186 99 130
10 127 134 193 259 145 165 75 74 74 120 115 129
11 139 156 169 192 134 145 88 62 69 159 155 139
12 157 159 154 171 130 128 94 97 68 120 295 134
13 130 150 181 215 127 142 87 78 62 107 154 130
14 168 167 168 243 137 112 109 63 63 88 110 136
15 189 149 173 227 140 101 118 59 58 83 113 149
16 179 177 177 298 135 110 81 71 91 75 134 154
17 151 179 179 220 132 166 87 81 137 73 118 133
18 158 168 191 194 144 145 80 137 86 79 99 122
19 196 155 187 178 162 145 70 78 81 81 123 112
20 163 154 199 209 187 125 68 77 63 78 105 109
21 150 161 244 232 221 111 64 71 69 84 93 132
22 136 214 188 250 187 117 64 67 168 82 95 123
23 149 229 174 163 157 118 76 60 129 102 107 147
24 158 233 221 260 165 113 69 86 77 81 113 142
25 221 224 179 262 176 97 65 63 68 90 113 155
26 210 205 181 285 140 156 79 58 83 136 114 149
27 177 171 185 263 146 148 74 61 105 111 117 126
28 186 161 247 201 154 108 74 64 162 116 111 137
29 144 141 223 181 164 109 63 56 129 110 149 139
30 131   213 183 140 94 66 51 166 92 133 123
31 164   200   122   76 58   84   119