Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
04087200 OAK CREEK NEAR SOUTH MILWAUKEE, WI
| Water year | Segment | Discharge code | Cumulative reservoir storage (acre-feet) | Urban fraction | Precipitation (inches) | Observed peak discharge (ft3/s) | Adjusted peak discharge (ft3/s) | Exceedance probability |
| 1958 | 1 | -- | 0 | 0.307 | 0.937 | 57 | 146 | 0.966 |
| 1959 | 1 | -- | 0 | 0.322 | 0.708 | 170 | 303 | 0.672 |
| 1960 | 1 | -- | 0 | 0.338 | 1.535 | 1100 | 1510 | 0.005 |
| 1961 | 1 | -- | 0 | 0.350 | 2.109 | 85 | 183 | 0.936 |
| 1962 | 1 | -- | 0 | 0.362 | 0.000 | 185 | 312 | 0.648 |
| 1963 | 1 | -- | 0 | 0.374 | 0.037 | 75 | 163 | 0.955 |
| 1964 | 1 | -- | 0 | 0.386 | 2.383 | 130 | 234 | 0.846 |
| 1965 | 1 | -- | 0 | 0.398 | 1.100 | 165 | 277 | 0.748 |
| 1966 | 1 | -- | 0 | 0.410 | 0.713 | 235 | 363 | 0.507 |
| 1967 | 1 | -- | 0 | 0.422 | 1.947 | 165 | 270 | 0.764 |
| 1968 | 1 | -- | 0 | 0.434 | 1.927 | 255 | 382 | 0.463 |
| 1969 | 1 | -- | 0 | 0.446 | 2.159 | 630 | 839 | 0.036 |
| 1970 | 1 | -- | 0 | 0.458 | 1.163 | 180 | 279 | 0.742 |
| 1971 | 1 | -- | 0 | 0.471 | 0.698 | 210 | 311 | 0.651 |
| 1972 | 1 | -- | 0 | 0.483 | 1.689 | 740 | 944 | 0.023 |
| 1973 | 1 | -- | 0 | 0.496 | 2.706 | 260 | 365 | 0.504 |
| 1974 | 1 | -- | 0 | 0.509 | 0.760 | 255 | 354 | 0.533 |
| 1975 | 1 | -- | 0 | 0.522 | 1.650 | 195 | 278 | 0.743 |
| 1976 | 1 | -- | 0 | 0.534 | 2.167 | 580 | 728 | 0.059 |
| 1977 | 1 | -- | 0 | 0.547 | 1.805 | 145 | 213 | 0.892 |
| 1978 | 1 | -- | 0 | 0.560 | 1.667 | 600 | 736 | 0.057 |
| 1979 | 1 | -- | 0 | 0.573 | 0.899 | 600 | 729 | 0.059 |
| 1980 | 1 | -- | 0 | 0.585 | 1.703 | 240 | 310 | 0.655 |
| 1981 | 1 | -- | 0 | 0.591 | 0.950 | 265 | 336 | 0.580 |
| 1982 | 1 | -- | 0 | 0.597 | 0.922 | 390 | 473 | 0.251 |
| 1983 | 1 | -- | 0 | 0.603 | 2.123 | 570 | 677 | 0.076 |
| 1984 | 1 | -- | 0 | 0.609 | 1.435 | 270 | 336 | 0.581 |
| 1985 | 1 | -- | 0 | 0.615 | 0.166 | 225 | 284 | 0.728 |
| 1986 | 1 | -- | 0 | 0.621 | 0.012 | 410 | 485 | 0.233 |
| 1987 | 1 | -- | 0 | 0.627 | 1.384 | 280 | 341 | 0.567 |
| 1988 | 1 | -- | 0 | 0.632 | 0.180 | 380 | 448 | 0.298 |
| 1989 | 1 | -- | 0 | 0.638 | 0.583 | 295 | 354 | 0.534 |
| 1990 | 1 | -- | 0 | 0.644 | 1.770 | 520 | 598 | 0.125 |
| 1991 | 1 | -- | 0 | 0.659 | 0.787 | 315 | 368 | 0.498 |
| 1992 | 1 | -- | 0 | 0.675 | 2.132 | 370 | 421 | 0.365 |
| 1993 | 1 | -- | 0 | 0.690 | 1.885 | 660 | 724 | 0.060 |
| 1994 | 1 | 2 | 0 | 0.706 | 0.878 | 350 | 387 | 0.449 |
| 1995 | 1 | -- | 0 | 0.721 | 2.382 | 340 | 370 | 0.492 |
| 1996 | 1 | -- | 0 | 0.736 | 2.015 | 440 | 467 | 0.262 |
| 1997 | 1 | 2 | 0 | 0.752 | 3.848 | 560 | 584 | 0.136 |
| 1998 | 1 | 2 | 0 | 0.767 | 0.644 | 300 | 311 | 0.651 |
| 1999 | 1 | -- | 0 | 0.782 | 1.479 | 910 | 921 | 0.026 |
| 2000 | 1 | -- | 0 | 0.798 | 3.893 | 1360 | 1360 | 0.008 |
| 2001 | 1 | -- | 0 | 0.798 | 1.138 | 450 | 450 | 0.293 |
| 2002 | 1 | -- | 0 | 0.798 | 1.118 | 247 | 247 | 0.817 |
| 2003 | 1 | -- | 0 | 0.798 | 0.668 | 144 | 144 | 0.967 |
| 2004 | 1 | -- | 0 | 0.798 | 1.400 | 446 | 446 | 0.301 |
| 2005 | 1 | -- | 0 | 0.798 | 2.043 | 446 | 446 | 0.301 |
| 2006 | 1 | -- | 0 | 0.798 | 0.969 | 628 | 628 | 0.103 |
| 2007 | 1 | -- | 0 | 0.798 | 1.533 | 511 | 511 | 0.200 |
| 2008 | 1 | -- | 0 | 0.798 | 4.379 | 628 | 628 | 0.103 |
| 2009 | 1 | -- | 0 | 0.798 | 2.316 | 420 | 420 | 0.368 |