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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 09469500 GILA RIVER BELOW COOLIDGE DAM, AZ.


Pinal County, Arizona
Hydrologic Unit Code 15050100
Latitude  33°10'10", Longitude 110°31'50" NAD27
Drainage area 12,886  square miles
Gage datum 2,309.33 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 1898-10-01 -> 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
1 168 464 380 495 390 377 465 571 460 169 79 121
2 155 352 389 488 390 384 472 590 474 164 80 129
3 152 323 381 472 384 392 480 586 497 159 79 145
4 149 301 390 467 385 394 480 516 507 193 79 154
5 146 283 393 473 388 398 486 485 440 229 78 215
6 147 268 401 484 389 401 498 492 442 242 80 214
7 151 254 410 505 392 407 483 503 414 227 79 206
8 147 241 443 486 395 412 486 502 505 247 82 193
9 152 264 456 491 393 415 490 522 423 242 96 191
10 226 296 463 468 390 423 499 520 394 236 91 187
11 221 327 470 459 392 429 511 519 368 192 105 186
12 201 310 474 460 395 431 491 504 365 196 132 181
13 275 291 464 451 394 428 494 524 347 189 123 181
14 273 291 462 455 396 431 494 506 323 264 103 201
15 266 320 464 459 394 437 532 501 298 444 94 189
16 279 295 468 459 392 443 515 544 284 273 89 187
17 366 304 477 454 386 442 518 528 279 218 91 185
18 467 293 475 450 388 444 510 497 275 179 87 183
19 704 297 469 449 385 448 603 495 268 161 85 284
20 1,240 333 469 447 384 449 543 499 252 151 100 473
21 944 459 472 442 382 447 498 514 246 150 80 440
22 674 446 480 444 382 448 534 550 243 146 85 390
23 427 454 494 430 379 454 509 550 239 134 106 431
24 351 441 497 405 377 454 482 512 224 126 116 425
25 302 425 504 396 375 458 477 501 213 113 115 368
26 287 415 497 392 376 463 510 495 210 99 112 319
27 319 399 499 388 378 462 533 461 218 89 147 285
28 340 395 497 389 376 462 548 484 202 83 101 337
29 506 459 511 388 373 469 540 481 199 80 109 315
30 593   517 391 374 469 568 485 176 78 110 246
31 603   508   375   544 460   80   180