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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 01670400 NORTH ANNA RIVER NEAR PARTLOW, VA


Louisa County, Virginia
Hydrologic Unit Code 02080106
Latitude  38°00'46", Longitude  77°42'05" NAD27
Drainage area 342  square miles
Gage datum 167.45 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 1978-10-01 -> 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
1 324 239 471 496 558 219 163 117 98 219 118 426
2 365 289 458 382 453 238 170 111 87 272 119 298
3 343 435 527 388 301 290 136 90 61 229 116 238
4 201 539 528 390 297 371 106 104 60 164 252 206
5 229 365 642 416 383 428 91 132 96 141 370 292
6 238 315 616 320 510 351 111 155 204 114 313 283
7 240 367 492 293 472 268 135 98 173 78 217 274
8 356 293 440 295 385 302 114 85 114 68 159 377
9 347 270 482 287 384 200 82 128 71 73 174 390
10 298 300 498 317 396 223 83 80 66 80 123 331
11 310 315 468 330 310 248 97 87 64 142 192 405
12 467 439 406 295 292 160 98 103 104 241 358 327
13 359 439 436 341 223 185 78 98 131 171 365 291
14 304 511 446 351 197 220 78 125 75 132 241 311
15 305 512 345 439 259 158 72 135 62 78 191 312
16 367 454 296 737 416 98 135 97 71 72 274 354
17 348 415 335 748 387 129 113 90 90 67 237 251
18 270 417 425 518 402 117 125 207 153 62 139 218
19 326 392 365 401 368 121 116 204 95 100 128 191
20 484 475 329 380 274 132 71 146 83 134 120 199
21 446 460 421 337 268 142 92 141 154 80 133 223
22 423 435 464 322 285 310 132 143 168 64 122 241
23 294 502 418 307 264 362 103 84 150 123 130 302
24 326 734 512 338 328 222 127 90 121 160 132 336
25 471 746 496 459 352 162 123 90 107 85 196 436
26 424 689 392 433 282 144 97 70 159 68 186 356
27 332 488 409 376 355 320 111 70 154 94 201 299
28 340 428 670 375 289 314 138 68 112 84 378 340
29 335 323 904 394 314 171 128 70 101 94 473 392
30 248   769 434 294 128 89 65 96 158 507 374
31 232   594   255   159 72   135   314