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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 07130500 ARKANSAS RIVER BELOW JOHN MARTIN RESERVOIR, CO.


Bent County, Colorado
Hydrologic Unit Code 11020009
Latitude  38°03'59", Longitude 102°55'55" NAD27
Drainage area 18,494  square miles
Contributing drainage area 17,709  square miles
Gage datum 3,737.40 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 1948-10-01 -> 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 15 18 17 207 398 517 755 618 454 217 41 11
2 15 17 15 250 403 527 740 603 409 210 28 9.5
3 14 18 13 262 421 514 722 626 399 208 26 8.8
4 12 18 12 273 418 499 739 621 393 207 25 8.4
5 13 16 12 288 417 513 732 624 377 205 26 8.5
6 15 17 14 297 427 516 757 602 370 209 25 8.8
7 16 20 15 313 449 517 757 561 356 209 25 9.2
8 16 23 20 338 469 513 756 548 329 198 23 9.2
9 14 24 27 346 470 527 760 570 319 191 23 8.7
10 11 18 30 352 478 575 755 581 332 191 22 8.5
11 11 12 26 369 473 602 763 565 312 186 21 8.4
12 12 12 23 369 478 604 780 539 295 187 21 9.6
13 14 16 24 386 485 612 804 516 296 185 20 11
14 15 17 23 396 486 623 746 505 302 177 19 11
15 15 15 22 404 472 656 739 495 301 176 18 15
16 14 13 22 396 478 643 744 492 295 173 18 21
17 13 14 24 381 493 625 724 470 287 173 17 20
18 13 16 25 375 480 672 716 458 273 175 15 17
19 13 16 34 379 471 695 717 466 261 174 14 14
20 14 17 46 394 470 681 720 450 249 177 13 13
21 17 20 57 415 470 676 700 456 241 175 14 13
22 16 22 57 427 466 706 702 474 251 172 15 16
23 15 21 52 426 461 732 718 486 258 171 13 17
24 14 20 57 425 491 723 695 486 250 173 13 17
25 13 19 65 415 502 698 674 496 242 175 13 16
26 14 19 70 409 504 673 649 484 226 175 13 16
27 16 20 78 412 527 680 639 442 218 173 12 15
28 18 18 90 441 532 695 637 455 219 174 12 12
29 18 15 106 435 505 697 670 468 222 174 12 10
30 16   121 402 515 725 642 466 216 174 11 9.7
31 17   131   508   632 471   159   13