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USGS Daily Statistics for the Nation

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 -> 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
1 139 131 217 182 156 112 84 73 68 130 96 168
2 138 140 188 189 154 117 96 79 62 117 103 139
3 140 164 180 200 144 117 110 79 59 104 104 130
4 175 207 249 183 151 124 122 70 67 94 161 120
5 133 161 230 194 183 231 145 60 93 83 200 141
6 115 168 222 170 169 153 101 77 207 73 111 117
7 131 168 195 164 165 159 81 66 175 75 112 149
8 151 138 172 157 154 202 83 62 181 125 115 123
9 177 136 176 220 147 225 84 114 96 186 98 129
10 145 133 195 256 144 163 74 76 73 120 114 129
11 143 156 169 190 133 143 87 63 68 159 153 142
12 158 160 155 175 128 127 93 97 67 120 290 134
13 133 159 180 216 125 140 85 78 62 107 152 129
14 168 170 168 242 135 111 108 63 62 88 109 135
15 189 151 173 226 140 100 116 59 57 83 111 147
16 179 177 176 295 135 109 80 70 89 74 132 152
17 150 178 178 218 131 164 86 81 135 72 116 131
18 157 167 189 192 145 144 79 135 86 78 98 124
19 195 155 185 177 162 143 70 78 81 80 121 112
20 162 154 197 207 185 124 68 76 63 77 104 109
21 149 160 241 229 219 110 64 70 69 83 92 131
22 135 212 186 247 185 116 63 66 165 81 97 122
23 148 227 174 161 155 117 75 60 127 101 106 145
24 157 230 219 257 163 111 68 85 76 80 111 141
25 219 222 178 258 174 96 66 63 68 89 112 153
26 208 203 180 281 139 154 79 58 86 134 113 148
27 177 170 184 260 145 145 73 60 126 110 116 135
28 197 160 245 198 152 107 73 64 170 115 109 140
29 148 141 220 179 162 108 63 55 131 109 146 140
30 133   211 181 138 93 65 51 166 91 132 123
31 165   198   121   76 58   83   118