Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05440000 KISHWAUKEE RIVER NEAR PERRYVILLE, IL
| 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 |
| 1940 | 1 | -- | 5738 | 0.023 | 0.665 | 3240 | 3890 | 0.881 |
| 1941 | 1 | -- | 5738 | 0.023 | 0.036 | 4220 | 4970 | 0.802 |
| 1942 | 1 | -- | 5738 | 0.023 | 0.650 | 5840 | 6740 | 0.651 |
| 1943 | 1 | -- | 5738 | 0.024 | 1.023 | 12600 | 14100 | 0.168 |
| 1944 | 1 | -- | 5738 | 0.024 | 1.247 | 14800 | 16500 | 0.103 |
| 1945 | 1 | -- | 5738 | 0.025 | 0.471 | 4360 | 5120 | 0.791 |
| 1946 | 1 | -- | 5738 | 0.025 | 0.624 | 16400 | 18200 | 0.075 |
| 1947 | 1 | -- | 5738 | 0.025 | 1.402 | 3990 | 4700 | 0.824 |
| 1948 | 1 | -- | 5738 | 0.026 | 1.836 | 15200 | 16900 | 0.095 |
| 1949 | 1 | 2 | 5738 | 0.026 | 0.317 | 9500 | 10700 | 0.326 |
| 1950 | 1 | -- | 5738 | 0.026 | 1.346 | 8670 | 9820 | 0.383 |
| 1951 | 1 | -- | 5738 | 0.027 | 0.206 | 11900 | 13300 | 0.193 |
| 1952 | 1 | -- | 5738 | 0.028 | 0.538 | 10900 | 12200 | 0.243 |
| 1953 | 1 | E | 5738 | 0.029 | 1.132 | 2620 | 3160 | 0.922 |
| 1954 | 1 | -- | 5738 | 0.030 | 1.456 | 4680 | 5430 | 0.766 |
| 1955 | 1 | -- | 5738 | 0.031 | 3.111 | 8190 | 9260 | 0.425 |
| 1956 | 1 | -- | 5738 | 0.032 | 0.643 | 2340 | 2830 | 0.936 |
| 1957 | 1 | E | 5738 | 0.033 | 0.508 | 2360 | 2850 | 0.935 |
| 1958 | 1 | -- | 5738 | 0.033 | 1.446 | 4650 | 5380 | 0.770 |
| 1959 | 1 | -- | 5738 | 0.034 | 0.023 | 5890 | 6720 | 0.653 |
| 1960 | 1 | -- | 5738 | 0.035 | 0.611 | 14100 | 15600 | 0.127 |
| 1961 | 1 | E | 5738 | 0.036 | 0.763 | 2690 | 3210 | 0.920 |
| 1962 | 1 | -- | 5738 | 0.037 | 0.319 | 10500 | 11700 | 0.271 |
| 1963 | 1 | E | 5738 | 0.038 | 0.215 | 2020 | 2440 | 0.952 |
| 1964 | 1 | E | 5738 | 0.039 | 0.716 | 2080 | 2510 | 0.950 |
| 1965 | 1 | 2 | 5738 | 0.041 | 0.143 | 8000 | 8960 | 0.449 |
| 1966 | 1 | -- | 5738 | 0.042 | 0.593 | 11300 | 12500 | 0.229 |
| 1967 | 1 | -- | 5738 | 0.043 | 1.512 | 4550 | 5210 | 0.784 |
| 1968 | 1 | E | 5738 | 0.044 | 1.552 | 5940 | 6700 | 0.655 |
| 1969 | 1 | -- | 5738 | 0.045 | 0.113 | 11100 | 12200 | 0.242 |
| 1970 | 1 | -- | 5738 | 0.046 | 1.854 | 5870 | 6610 | 0.663 |
| 1971 | 1 | -- | 5738 | 0.047 | 0.462 | 14200 | 15500 | 0.128 |
| 1972 | 1 | -- | 5738 | 0.049 | 1.584 | 9080 | 10000 | 0.369 |
| 1973 | 1 | -- | 5738 | 0.050 | 1.777 | 14800 | 16100 | 0.112 |
| 1974 | 1 | -- | 5738 | 0.052 | 1.183 | 13000 | 14100 | 0.166 |
| 1975 | 1 | -- | 5738 | 0.054 | 0.024 | 8060 | 8900 | 0.454 |
| 1976 | 1 | -- | 5738 | 0.055 | 1.261 | 9520 | 10400 | 0.344 |
| 1977 | 1 | E | 5738 | 0.057 | 0.485 | 1340 | 1600 | 0.981 |
| 1978 | 1 | -- | 5738 | 0.058 | 1.804 | 13000 | 14100 | 0.169 |
| 1979 | 1 | -- | 5738 | 0.060 | 0.305 | 16700 | 18000 | 0.078 |
| 1980 | 1 | -- | 5738 | 0.061 | 0.374 | 5040 | 5610 | 0.753 |
| 1981 | 1 | E | 5738 | 0.062 | 1.966 | 3760 | 4230 | 0.857 |
| 1982 | 1 | -- | 5738 | 0.063 | 0.296 | 7990 | 8740 | 0.468 |
| 1983 | 1 | -- | 5738 | 0.064 | 1.617 | 11300 | 12200 | 0.242 |
| 1984 | 1 | -- | 5738 | 0.065 | 0.683 | 8820 | 9600 | 0.399 |
| 1985 | 1 | -- | 5738 | 0.066 | 1.267 | 7970 | 8690 | 0.472 |
| 1986 | 1 | -- | 5738 | 0.067 | 0.135 | 7890 | 8590 | 0.480 |
| 1987 | 1 | -- | 5738 | 0.068 | 2.467 | 8720 | 9460 | 0.409 |
| 1988 | 1 | -- | 5738 | 0.069 | 0.221 | 7580 | 8240 | 0.511 |
| 1989 | 1 | -- | 5738 | 0.070 | 1.030 | 5570 | 6100 | 0.709 |
| 1990 | 1 | -- | 5738 | 0.071 | 0.932 | 5240 | 5750 | 0.741 |
| 1991 | 1 | -- | 5738 | 0.073 | 1.074 | 6170 | 6710 | 0.654 |
| 1992 | 1 | E | 5738 | 0.075 | 0.626 | 2710 | 3040 | 0.928 |
| 1993 | 1 | -- | 5738 | 0.078 | 0.814 | 11400 | 12100 | 0.244 |
| 1994 | 1 | -- | 5738 | 0.080 | 0.997 | 17100 | 18100 | 0.077 |
| 1995 | 1 | -- | 5738 | 0.082 | 1.232 | 4260 | 4650 | 0.828 |
| 1996 | 1 | -- | 5738 | 0.084 | 2.876 | 24200 | 25400 | 0.028 |
| 1997 | 1 | -- | 5738 | 0.086 | 1.848 | 17400 | 18300 | 0.074 |
| 1998 | 1 | -- | 5738 | 0.088 | 0.922 | 5480 | 5880 | 0.729 |
| 1999 | 1 | -- | 5738 | 0.090 | 1.464 | 16300 | 17100 | 0.092 |
| 2000 | 1 | -- | 5738 | 0.092 | 1.666 | 11300 | 11900 | 0.259 |
| 2001 | 1 | -- | 5738 | 0.097 | 0.683 | 8810 | 9270 | 0.424 |
| 2002 | 1 | -- | 5738 | 0.102 | 2.434 | 15600 | 16200 | 0.110 |
| 2003 | 1 | E | 5738 | 0.108 | 0.368 | 2360 | 2520 | 0.950 |
| 2004 | 1 | -- | 5738 | 0.113 | 1.439 | 8420 | 8710 | 0.470 |
| 2005 | 1 | -- | 5738 | 0.118 | 0.653 | 4630 | 4800 | 0.816 |
| 2006 | 1 | E | 5738 | 0.123 | 0.798 | 2970 | 3070 | 0.927 |
| 2007 | 1 | -- | 5738 | 0.128 | 1.505 | 14000 | 14200 | 0.165 |
| 2008 | 1 | -- | 5738 | 0.133 | 0.465 | 10300 | 10400 | 0.345 |
| 2009 | 1 | -- | 5738 | 0.139 | 1.022 | 14400 | 14500 | 0.157 |