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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 03047000 Loyalhanna Creek at Loyalhanna Dam, PA


Westmoreland County, Pennsylvania
Hydrologic Unit Code 05010008
Latitude  40°27'32", Longitude  79°26'58" NAD83
Drainage area 290  square miles
Gage datum 870.18 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 1939-10-01 -> 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
1 653 697 920 831 610 527 387 200 184 176 280 513
2 678 685 948 876 597 507 367 196 184 177 287 498
3 721 696 1,020 933 601 456 333 200 181 198 276 456
4 754 745 947 973 607 487 331 197 188 212 283 446
5 806 827 862 1,010 630 567 311 229 188 233 283 437
6 868 891 883 1,030 628 439 293 232 189 240 277 474
7 797 850 1,030 1,020 670 376 289 233 182 241 284 506
8 708 866 1,130 1,010 649 340 256 224 177 231 277 503
9 645 844 1,170 1,020 684 352 223 212 182 198 252 533
10 550 769 1,190 1,020 724 349 230 210 188 179 257 554
11 509 732 1,170 990 713 337 253 200 214 175 273 578
12 540 742 1,130 952 707 379 278 184 213 180 276 587
13 567 756 1,120 863 731 341 288 184 206 189 293 583
14 585 757 1,050 828 731 333 297 195 209 192 287 601
15 599 716 1,000 771 728 397 289 191 223 197 278 583
16 610 739 1,010 741 727 427 261 199 222 195 275 555
17 639 834 1,010 838 706 439 238 183 202 188 277 545
18 633 884 943 928 689 454 225 177 232 228 308 528
19 567 864 909 934 673 447 214 183 244 226 349 537
20 562 859 899 947 673 419 195 179 232 215 369 563
21 583 848 837 820 611 375 181 153 227 244 360 559
22 565 855 879 700 584 363 182 141 215 238 362 526
23 536 856 935 618 569 373 212 143 202 218 346 553
24 581 854 946 620 522 392 237 152 186 220 345 622
25 629 855 925 652 503 405 232 156 169 217 359 673
26 617 846 961 674 486 386 211 155 182 188 398 711
27 640 885 941 674 490 356 185 153 199 180 404 703
28 689 930 918 675 459 374 166 152 216 204 397 696
29 682 820 869 706 496 390 163 189 197 223 425 693
30 705   848 662 537 387 168 204 184 227 478 661
31 702   886   559   194 198   243   667