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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 06483290 Rock River below Tom Creek at Rock Rapids, IA


Lyon County, Iowa
Hydrologic Unit Code 10170204
Latitude  43°25'22.8", Longitude  96°09'52.5" NAD27
Drainage area 853  square miles
Gage datum 1,308.57 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 2000-10-01 -> 2021-09-30)

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
1 228 174 366 904 859 776 679 244 143 347 299 260
2 223 171 406 858 885 733 679 237 135 347 294 254
3 210 163 394 769 828 695 651 239 134 389 286 242
4 197 156 376 701 758 643 634 243 152 458 281 246
5 191 147 414 633 767 710 675 256 164 503 278 243
6 181 150 451 613 822 876 746 234 165 541 278 244
7 179 149 469 771 856 753 779 231 150 564 274 238
8 182 142 478 1,030 817 693 698 219 147 552 267 234
9 172 139 525 774 761 667 592 198 164 517 263 229
10 160 219 541 653 747 652 555 215 175 541 254 226
11 160 217 518 651 759 639 599 298 208 545 246 236
12 155 211 645 654 784 657 566 257 291 509 239 245
13 148 214 849 654 765 1,090 572 215 522 443 245 244
14 147 201 1,570 684 710 1,010 595 192 767 410 255 244
15 144 188 1,640 693 662 1,110 641 196 493 401 260 248
16 139 178 1,440 694 627 1,800 645 204 469 406 254 245
17 141 182 1,440 753 639 2,060 563 258 439 405 254 235
18 139 190 1,360 797 674 1,550 446 296 350 392 273 222
19 144 194 1,310 767 631 1,240 399 318 301 378 297 207
20 164 219 1,290 736 607 953 416 326 460 367 293 219
21 184 237 1,280 759 697 1,220 418 328 523 352 276 214
22 189 242 1,230 779 717 1,500 409 312 501 350 268 207
23 185 261 1,090 815 678 1,470 377 282 598 370 262 205
24 169 278 1,010 798 690 1,270 378 247 794 380 276 195
25 157 266 916 747 728 1,140 448 210 1,110 369 273 198
26 153 229 775 715 704 1,130 375 186 808 361 256 211
27 157 224 698 716 833 1,040 337 169 636 351 240 220
28 156 226 744 766 1,000 979 338 162 500 337 257 214
29 164 621 899 784 952 837 328 162 419 321 270 201
30 168   894 794 912 724 298 162 373 312 267 216
31 173   874   866   269 156   305   237