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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 15200280 GULKANA R AT SOURDOUGH AK


Copper River Census Area County, Alaska
Hydrologic Unit Code 190201020609
Latitude  62°31'15", Longitude 145°31'51" NAD27
Drainage area 1,760.0  square miles
Gage datum 1,867.0 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 1972-10-01 -> 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
1 433 372 334 342 1,440 4,140 1,910 1,390 1,480 1,490 746 526
2 431 371 333 344 1,620 4,060 1,880 1,380 1,490 1,480 735 523
3 428 370 333 346 1,920 3,990 1,870 1,340 1,490 1,460 723 521
4 427 367 333 349 2,320 3,820 1,810 1,300 1,480 1,430 714 518
5 425 366 332 351 2,610 3,540 1,760 1,250 1,480 1,410 701 514
6 421 363 332 357 2,650 3,300 1,730 1,230 1,500 1,420 689 506
7 419 362 331 360 2,750 3,150 1,710 1,280 1,520 1,420 680 504
8 418 360 330 365 2,910 3,060 1,680 1,390 1,520 1,400 666 500
9 415 359 329 368 3,030 3,060 1,640 1,420 1,530 1,380 659 497
10 413 358 329 374 3,060 3,020 1,580 1,440 1,630 1,350 655 491
11 409 356 328 382 3,130 2,880 1,510 1,430 1,780 1,320 645 487
12 407 354 329 392 3,190 2,840 1,500 1,400 1,820 1,280 637 483
13 406 353 329 401 3,190 2,850 1,480 1,430 1,760 1,230 632 481
14 404 352 329 411 3,280 2,780 1,480 1,450 1,670 1,190 623 478
15 402 351 329 425 3,470 2,640 1,440 1,400 1,600 1,160 615 477
16 401 349 329 437 3,680 2,550 1,420 1,370 1,550 1,140 604 474
17 399 348 330 455 3,850 2,440 1,460 1,360 1,530 1,120 597 471
18 399 346 330 469 3,860 2,370 1,500 1,380 1,510 1,090 588 470
19 397 345 330 487 3,880 2,350 1,470 1,400 1,490 1,080 585 465
20 397 344 330 505 3,900 2,300 1,430 1,380 1,480 1,060 577 464
21 396 343 332 531 3,840 2,290 1,420 1,460 1,480 1,010 568 459
22 395 342 332 560 3,830 2,260 1,410 1,600 1,540 990 564 456
23 392 341 332 598 3,840 2,310 1,420 1,620 1,570 952 561 455
24 390 341 332 630 3,880 2,300 1,440 1,560 1,580 916 558 451
25 389 339 334 688 3,930 2,330 1,460 1,540 1,590 871 556 447
26 385 338 336 753 4,040 2,310 1,470 1,530 1,600 839 549 445
27 384 338 336 838 4,150 2,260 1,440 1,510 1,570 821 547 443
28 381 336 337 945 4,180 2,180 1,410 1,540 1,510 797 541 441
29 380 308 338 1,080 4,200 2,050 1,430 1,530 1,470 791 535 441
30 377   339 1,240 4,220 1,980 1,420 1,490 1,480 770 531 437
31 375   341   4,220   1,390 1,490   754   436