Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05517890 COBB DITCH NEAR KOUTS, IND.
| 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 |
| 1968 | 1 | -- | 0 | 0.022 | 1.862 | 194 | 280 | 0.919 |
| 1969 | 1 | 2 | 0 | 0.022 | 0.507 | 300 | 408 | 0.813 |
| 1970 | 1 | | 0 | 0.023 | 0.645 | 444 | 578 | 0.631 |
| 1971 | 1 | 18 | 0 | 0.027 | 0.528 | 290 | 394 | 0.827 |
| 1972 | 1 | -- | 0 | 0.031 | 0.742 | 466 | 600 | 0.609 |
| 1973 | 1 | -- | 0 | 0.034 | 1.400 | 744 | 919 | 0.291 |
| 1974 | 1 | -- | 0 | 0.038 | 0.900 | 347 | 456 | 0.766 |
| 1975 | 1 | -- | 0 | 0.042 | 1.384 | 576 | 723 | 0.464 |
| 1976 | 1 | -- | 0 | 0.046 | 1.024 | 777 | 946 | 0.271 |
| 1977 | 1 | -- | 0 | 0.049 | 0.791 | 220 | 300 | 0.905 |
| 1978 | 1 | -- | 0 | 0.053 | 0.350 | 498 | 623 | 0.582 |
| 1979 | 1 | -- | 0 | 0.057 | 0.837 | 650 | 796 | 0.390 |
| 1980 | 1 | -- | 0 | 0.060 | 0.339 | 252 | 333 | 0.881 |
| 1981 | 1 | -- | 0 | 0.062 | 2.343 | 761 | 915 | 0.294 |
| 1982 | 1 | -- | 0 | 0.064 | 0.354 | 751 | 902 | 0.303 |
| 1983 | 1 | -- | 0 | 0.066 | 2.727 | 763 | 914 | 0.295 |
| 1984 | 1 | -- | 51 | 0.067 | 0.910 | 531 | 651 | 0.545 |
| 1985 | 1 | -- | 51 | 0.069 | 0.765 | 795 | 946 | 0.271 |
| 1986 | 1 | -- | 51 | 0.071 | 1.327 | 1070 | 1260 | 0.126 |
| 1987 | 1 | -- | 51 | 0.073 | 1.028 | 661 | 796 | 0.391 |
| 1988 | 1 | -- | 51 | 0.074 | 0.855 | 424 | 524 | 0.692 |
| 1989 | 1 | -- | 51 | 0.076 | 1.981 | 916 | 1070 | 0.192 |
| 1990 | 1 | -- | 51 | 0.078 | 2.028 | 1070 | 1250 | 0.129 |
| 1991 | 1 | -- | 51 | 0.087 | 2.127 | 1160 | 1340 | 0.099 |
| 1992 | 1 | E | 51 | 0.095 | 0.677 | 236 | 300 | 0.905 |
| 1993 | 1 | -- | 51 | 0.104 | 1.181 | 779 | 899 | 0.305 |
| 1994 | 1 | -- | 51 | 0.113 | 1.320 | 481 | 565 | 0.646 |
| 1995 | 1 | -- | 51 | 0.121 | 0.866 | 426 | 499 | 0.721 |
| 1996 | 1 | -- | 51 | 0.130 | 3.528 | 991 | 1100 | 0.181 |
| 1997 | 1 | -- | 51 | 0.139 | 1.037 | 1030 | 1140 | 0.168 |
| 1998 | 1 | -- | 51 | 0.147 | 0.705 | 593 | 664 | 0.530 |
| 1999 | 1 | -- | 51 | 0.156 | 0.846 | 643 | 711 | 0.476 |
| 2000 | 1 | -- | 51 | 0.165 | 1.374 | 700 | 765 | 0.420 |
| 2001 | 1 | -- | 51 | 0.173 | 0.866 | 548 | 598 | 0.611 |
| 2002 | 1 | -- | 51 | 0.181 | 1.225 | 585 | 631 | 0.571 |
| 2003 | 1 | -- | 51 | 0.189 | 1.297 | 808 | 857 | 0.339 |