Station list
Available data
ROCK RIVER BASIN
05435500 PECATONICA RIVER AT FREEPORT, IL
LOCATION.--Lat 42°18'13", long 89°36'57", in SE1/4 sec.30, T.27 N., R.8 E., Stephenson County, Hydrologic Unit 07090003, on
right bank on property of Commonwealth Edison Company in Freeport, 0.3 mi upstream from Stephenson Street Bridge, 5 mi
upstream from Yellow Creek, and at mile 61.9.
DRAINAGE AREA.--1,326 mi2.
PERIOD OF RECORD.--September 1914 to current year.
REVISED RECORDS.--WSP 1175: 1944, 1948. WSP 1508: 1915(M), 1917(M), 1921(M), 1924(M), 1928(M), 1930(M),
1935-37. WDR IL-75-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 743.18 ft above sea level. Prior to Jan. 15, 1935, nonrecording gage at site 0.9 mi
downstream at datum 4.2 ft lower. July 13, 1943, to Aug. 25, 1982, auxiliary nonrecording gage read once daily 0.9 mi
downstream.
REMARKS.--Records good except those for estimated daily discharges, which are poor. Gage height telemeter at station.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
DAILY MEAN VALUES
|
---|
DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP
|
---|
|
1 | 587 | 644 | 596 | 623 | e620 | 1340 | 2630 | 1970 | 1480 | 2790 | 1050 | 1050
|
2 | 586 | 644 | 624 | 675 | 655 | 1390 | 3210 | 1900 | 1450 | 2780 | 1020 | 971
|
3 | 582 | 644 | 646 | 704 | 679 | 1340 | 3410 | 1890 | 1450 | 2760 | 1010 | 942
|
4 | 575 | 641 | 633 | 774 | 698 | 1260 | 3630 | 1870 | 1380 | 2690 | 1010 | 930
|
5 | 569 | 638 | 622 | 863 | 683 | 1180 | 3950 | 1850 | 1320 | 2460 | 1050 | 917
|
|
6 | 564 | 647 | 616 | 945 | 651 | 1120 | 4150 | 1830 | 1270 | 2270 | 1260 | 908
|
7 | 557 | 654 | 602 | 1030 | 629 | 1070 | 4110 | 1820 | 1240 | 2310 | 1560 | 896
|
8 | 556 | 660 | 589 | 1050 | 611 | 1100 | 3910 | 1880 | 1220 | 2430 | 1610 | 880
|
9 | 550 | 659 | 577 | 976 | 604 | 1260 | 3740 | 1920 | 1230 | 2280 | 1490 | 863
|
10 | 550 | 649 | 578 | 846 | 602 | 1190 | 3500 | 1950 | 1260 | 2050 | 1360 | 852
|
|
11 | 555 | 633 | 581 | 711 | 636 | 1080 | 3270 | 1950 | 1340 | 1850 | 1230 | 829
|
12 | 565 | 620 | 582 | e560 | 834 | 954 | 3060 | 1860 | 1550 | 1710 | 1140 | 811
|
13 | 584 | 612 | 572 | e620 | 917 | 921 | 2870 | 1830 | 1660 | 1600 | 1100 | 806
|
14 | 599 | 606 | 558 | e660 | 926 | 960 | 2730 | 1780 | 1760 | 1520 | 1060 | 892
|
15 | 617 | 602 | 533 | e640 | 903 | 980 | 2600 | 1690 | 1710 | 1450 | 1040 | 1280
|
|
16 | 634 | 597 | 511 | e610 | 867 | 953 | 2540 | 1620 | 1590 | 1400 | 1020 | 1620
|
17 | 621 | 583 | 559 | e600 | 862 | 923 | 2640 | 1560 | 1570 | 1360 | 1030 | 1730
|
18 | 595 | 580 | 573 | e580 | 894 | 960 | 2690 | 1530 | 1540 | 1310 | 1030 | 1620
|
19 | 580 | 579 | 568 | e570 | 923 | 1110 | 2720 | 1500 | 1980 | 1330 | 1030 | 1380
|
20 | 575 | 570 | 566 | e560 | 921 | 1230 | 2740 | 1460 | 2410 | 1340 | 1020 | 1190
|
|
21 | 571 | 578 | 565 | e560 | 885 | 1290 | 2780 | 1410 | 2550 | 1330 | 1020 | 1080
|
22 | 567 | 581 | 561 | e550 | 845 | 1290 | 2820 | 1380 | 2580 | 1360 | 1000 | 1030
|
23 | 565 | 576 | 552 | e550 | 817 | 1260 | 2760 | 1340 | 2590 | 1380 | 974 | 989
|
24 | 566 | 556 | 551 | e550 | 802 | 1230 | 2610 | 1400 | 2510 | 1350 | 979 | 963
|
25 | 573 | 538 | 566 | e540 | 804 | 1200 | 2440 | 1530 | 2260 | 1270 | 1040 | 947
|
|
26 | 583 | 553 | 572 | e540 | 809 | 1180 | 2300 | 1610 | 2220 | 1210 | 1080 | 946
|
27 | 601 | 600 | 549 | e540 | 942 | 1160 | 2230 | 1620 | 2150 | 1160 | 1040 | 955
|
28 | 606 | 608 | 541 | e540 | 1220 | 1150 | 2180 | 1540 | 2300 | 1140 | 1060 | 942
|
29 | 615 | 590 | 576 | e550 | --- | 1150 | 2120 | 1490 | 2680 | 1120 | 1120 | 918
|
30 | 629 | 584 | 605 | e560 | --- | 1120 | 2050 | 1470 | 2790 | 1100 | 1130 | 897
|
|
31 | 629 | --- | 624 | e590 | --- | 1620 | --- | 1500 | --- | 1070 | 1120 | ---
|
TOTAL | 18106 | 18226 | 17948 | 20667 | 22239 | 35971 | 88390 | 51950 | 55040 | 53180 | 34683 | 31034
|
MEAN | 584 | 608 | 579 | 667 | 794 | 1160 | 2946 | 1676 | 1835 | 1715 | 1119 | 1034
|
MAX | 634 | 660 | 646 | 1050 | 1220 | 1620 | 4150 | 1970 | 2790 | 2790 | 1610 | 1730
|
MIN | 550 | 538 | 511 | 540 | 602 | 921 | 2050 | 1340 | 1220 | 1070 | 974 | 806
|
CFSM | .44 | .46 | .44 | .50 | .60 | .88 | 2.22 | 1.26 | 1.38 | 1.29 | .84 | .78
|
IN. | .51 | .51 | .50 | .58 | .62 | 1.01 | 2.48 | 1.46 | 1.54 | 1.49 | .97 | .87
|
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 1998, BY WATER YEAR (WY)
|
---|
MEAN | 686 | 745 | 683 | 756 | 1123 | 1779 | 1213 | 977 | 976 | 896 | 704 | 750
|
MAX | 2654 | 2773 | 1807 | 2817 | 3992 | 4915 | 3539 | 3931 | 3172 | 6423 | 2279 | 3011
|
(WY) | 1928 | 1962 | 1983 | 1973 | 1938 | 1929 | 1993 | 1973 | 1993 | 1993 | 1993 | 1938
|
MIN | 228 | 258 | 201 | 163 | 282 | 356 | 396 | 232 | 266 | 211 | 233 | 218
|
(WY) | 1965 | 1965 | 1959 | 1959 | 1964 | 1957 | 1957 | 1934 | 1934 | 1936 | 1934 | 1958
|
SUMMARY STATISTICS | FOR 1997 CALENDAR YEAR | FOR 1998 WATER YEAR | WATER YEARS 1914 - 1998 |
---|
ANNUAL TOTAL | 385142 | | 447434 | | |
|
ANNUAL MEAN | 1055 | | 1226 | | 940 |
|
HIGHEST ANNUAL MEAN | | | | | 2452 | 1993
|
LOWEST ANNUAL MEAN | | | | | 373 | 1964
|
HIGHEST DAILY MEAN | 10300 | Feb 22 | 4150 | Apr 6 | 17000 | Mar 28 1916
|
LOWEST DAILY MEAN | 511 | Dec 16 | 511 | Dec 16 | 118 | Aug 4 1936
|
ANNUAL SEVEN-DAY MINIMUM | 553 | Dec 14 | 544 | Jan 22 | 150 | Dec 18 1964
|
INSTANTANEOUS PEAK FLOW | | | 4170 | Apr 6 | 18400 | Mar 16 1929
|
INSTANTANEOUS PEAK STAGE | | | 13.04 | Apr 6 | 19.76 A | Mar 16 1929
|
INSTANTANEOUS LOW FLOW | | | 504 | Dec 16 | 82 B | Dec 11 1957
|
ANNUAL RUNOFF (CFSM) | .80 | | .92 | | .71 |
|
ANNUAL RUNOFF (INCHES) | 10.80 | | 12.55 | | 9.63 |
|
10 PERCENT EXCEEDS | 1400 | | 2430 | | 1760 |
|
50 PERCENT EXCEEDS | 745 | | 1020 | | 651 |
|
90 PERCENT EXCEEDS | 571 | | 567 | | 312 |
|
A - Estimated due to backwater from ice.
B - Site and datum then in use.