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USGS Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


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 01556000 Frankstown Br Juniata River at Williamsburg, PA


Blair County, Pennsylvania
Hydrologic Unit Code 02050302
Latitude  40°27'47", Longitude  78°12'00" NAD27
Drainage area 291  square miles
Gage datum 831.78 feet above NGVD29
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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 1916-10-01 -> 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
1 465 386 777 916 578 347 225 159 170 181 209 420
2 520 413 751 946 531 366 226 147 193 184 222 414
3 484 461 706 950 562 352 221 197 138 209 234 356
4 472 482 804 935 544 368 225 187 127 167 225 362
5 478 453 971 970 590 382 234 162 140 154 246 355
6 468 433 985 887 566 363 209 160 187 151 212 365
7 441 473 901 834 627 342 211 192 247 143 218 388
8 433 457 815 773 619 300 195 203 177 140 338 387
9 423 411 791 782 627 303 187 179 279 176 297 368
10 437 441 817 782 609 285 186 164 322 186 256 371
11 405 447 881 693 599 274 189 156 220 161 222 429
12 397 478 942 719 714 330 183 158 166 147 261 406
13 413 521 927 780 646 345 210 168 176 142 302 413
14 374 599 950 760 589 334 188 154 152 143 251 427
15 383 604 967 786 542 289 184 145 139 166 242 399
16 376 562 864 819 542 293 194 138 138 197 268 397
17 380 550 907 846 526 277 189 139 180 180 318 372
18 391 524 987 687 573 257 188 159 354 191 273 390
19 474 522 877 630 546 303 180 139 228 216 301 377
20 483 589 880 660 501 289 235 134 168 222 330 366
21 429 615 889 659 526 365 185 169 146 205 287 386
22 495 642 914 683 513 375 178 174 144 199 318 406
23 456 666 849 620 502 446 204 141 161 243 309 412
24 462 689 947 580 457 327 163 148 144 223 269 440
25 533 779 896 571 442 272 167 139 178 202 311 462
26 499 820 807 681 437 244 162 130 200 223 332 412
27 499 706 810 689 392 278 155 138 169 202 337 395
28 473 746 818 674 406 286 169 121 222 227 481 409
29 432 656 916 613 463 279 164 129 225 232 433 419
30 441   909 591 405 227 156 127 206 275 388 485
31 442   970   382   156 135   217   455