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USGS Daily Statistics for Alaska

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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 15200280 GULKANA R AT SOURDOUGH AK


Valdez-Cordova Census Area County, Alaska
Hydrologic Unit Code 19020102
Latitude  62°31'15", Longitude 145°31'51" NAD27
Drainage area 1,760  square miles
Gage datum 1,852.1 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
1 429 370 335 345 1,470 4,140 1,910 1,390 1,480 1,490 742 521
2 427 370 335 347 1,650 4,060 1,880 1,380 1,490 1,480 731 517
3 424 369 335 350 1,960 3,990 1,870 1,340 1,490 1,460 719 516
4 423 366 335 353 2,370 3,820 1,810 1,300 1,480 1,430 710 513
5 421 364 334 355 2,670 3,540 1,760 1,250 1,480 1,410 696 509
6 417 362 334 361 2,710 3,300 1,730 1,230 1,500 1,420 685 500
7 416 360 333 364 2,790 3,150 1,710 1,280 1,520 1,420 676 499
8 414 359 333 369 2,940 3,060 1,680 1,390 1,520 1,400 661 495
9 412 358 332 372 3,050 3,060 1,640 1,420 1,530 1,380 654 491
10 410 357 331 379 3,080 3,020 1,580 1,440 1,630 1,340 650 486
11 406 355 331 387 3,150 2,880 1,510 1,430 1,780 1,310 640 482
12 404 353 331 398 3,200 2,840 1,500 1,400 1,820 1,270 632 478
13 403 352 332 407 3,190 2,850 1,480 1,430 1,760 1,230 627 475
14 401 352 332 417 3,280 2,780 1,480 1,450 1,670 1,180 618 473
15 399 350 332 430 3,480 2,640 1,440 1,400 1,600 1,160 610 472
16 398 349 332 443 3,680 2,550 1,420 1,370 1,550 1,130 599 469
17 397 347 333 461 3,850 2,440 1,460 1,360 1,530 1,110 591 466
18 396 346 333 476 3,870 2,370 1,500 1,380 1,510 1,090 583 465
19 395 345 333 494 3,890 2,350 1,470 1,400 1,490 1,080 580 460
20 394 345 333 513 3,910 2,300 1,430 1,380 1,480 1,060 571 459
21 394 343 335 540 3,860 2,290 1,420 1,460 1,480 1,020 562 454
22 393 342 335 569 3,850 2,260 1,410 1,600 1,540 991 558 451
23 390 341 335 608 3,870 2,310 1,420 1,620 1,570 952 556 450
24 388 341 336 641 3,910 2,300 1,440 1,560 1,580 915 553 446
25 387 340 337 699 3,970 2,330 1,460 1,540 1,590 869 550 442
26 383 339 339 766 4,070 2,310 1,470 1,530 1,600 836 544 440
27 382 339 340 853 4,150 2,260 1,440 1,510 1,570 818 541 438
28 379 337 340 964 4,180 2,180 1,410 1,540 1,510 794 536 437
29 378 308 342 1,100 4,200 2,050 1,430 1,530 1,470 788 530 436
30 376   343 1,260 4,220 1,980 1,420 1,490 1,520 766 526 432
31 373   345   4,220   1,390 1,490   750   432