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USGS 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 02047500 BLACKWATER RIVER NEAR DENDRON, VA


Surry County, Virginia
Hydrologic Unit Code 03010202
Latitude  37°01'30", Longitude  76°52'30" NAD27
Drainage area 290  square miles
Gage datum 0.00 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 1941-10-01 -> 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
1 400 501 551 586 349 202 112 190 136 200 163 278
2 410 493 549 584 356 202 102 181 176 213 159 277
3 418 484 553 564 352 218 95 166 170 199 158 268
4 426 483 565 529 338 232 96 192 173 173 164 253
5 435 506 572 498 318 245 111 208 189 154 167 248
6 429 533 589 480 305 237 117 225 190 157 171 260
7 434 559 631 476 303 224 124 237 208 225 185 272
8 441 564 672 482 310 236 122 261 209 294 199 275
9 432 554 682 493 305 264 117 223 232 288 199 275
10 436 544 673 483 297 237 127 182 233 272 198 289
11 447 532 653 467 279 218 133 162 229 238 193 310
12 443 532 634 456 262 192 148 172 244 207 200 330
13 448 534 613 455 252 178 170 188 249 182 247 347
14 455 533 604 463 232 150 157 188 214 159 280 358
15 465 534 584 449 222 131 160 187 177 136 276 370
16 482 547 560 449 223 120 165 224 225 118 268 388
17 488 558 551 463 219 113 184 206 276 109 268 393
18 485 569 555 449 211 109 193 193 302 121 254 394
19 482 583 572 423 202 107 194 191 328 127 237 402
20 485 591 593 403 216 114 179 197 310 124 224 394
21 485 574 602 380 223 119 166 178 273 143 217 384
22 484 551 594 371 214 120 154 163 247 167 219 377
23 492 544 577 360 206 116 157 141 236 164 227 368
24 495 547 559 354 203 112 155 130 222 166 233 359
25 493 555 551 344 197 109 152 123 212 170 234 361
26 487 555 549 327 190 109 145 128 206 162 246 376
27 480 557 542 320 192 106 131 143 226 151 257 370
28 488 557 547 320 190 102 129 147 266 152 263 362
29 510 575 554 319 181 104 134 158 226 166 266 367
30 512   567 331 174 115 150 140 190 172 270 384
31 507   574   187   177 126   168   393