|
LOCATION.-- Lat 41°20'17", long 88°51'10" (NAD of 1927), in SW1/4SW1/4 sec.11, T.33 N., R.3 E., LaSalle County, Hydrologic Unit 07130001, downstream of the railroad bridge, 0.25 miles, and downstream 0.5 miles of the Route 23 bridge in Ottawa and the confluence with the Fox River. |
|
|
DRAINAGE AREA.-- 10,949 mi2. |
|
|
PERIOD OF RECORD.-- |
|
|
SURFACE-WATER DISCHARGE AND STAGE |
|
|
DISCHARGE: March 11, 1903 to December 31, 1903. |
|
|
PARTIAL RECORD: Miscellaneous discharge measurements, water years 1903-1904. |
|
|
SURFACE-WATER QUALITY |
|
|
CHEMICAL: Water years 1997 to current year. |
|
|
MISCELLANEOUS: Contaminants in streambed sediments, August 1998; contaminants in fish tissue, August, 1998. |
|
|
BIOLOGICAL |
|
|
BENTHIC MACROINVERTEBRATES: Water years 1998-99, and 2002. |
|
|
FISH: Water years 1998-99, and 2002-03. |
|
|
HABITAT: Water years 1998-99. |
|
|
GAGE.-- Prior to November 1, 1903, vertical staff at west end of first pier from the north abutment of the railroad bridge at same datum. November 1, 1903 to February 21, 1904, chain gage read twice daily. Datum of gage is 579.48 ft above NGVD of 1929. |
|
|
EXTREMES FOR PERIOD OF RECORD.-- |
|
|
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 46,900 ft3/s, Apr. 15, 1903, gage height, -119.08 ft (460.40 ft above NGVD of 1929); minimum discharge, 6,740 ft3/s, Sept. 8, 1903. |
|
|
REMARKS FOR CURRENT YEAR.--Habitat measurements, including physical and geomorphic, were collected as part of the National Water-Quality Assessment program (NAWQA) in the lower Illinois River Basin. The measurements were collected according to Meador and others (1993). Reach A begins at the red buoy near river mile 239, marking the top of Hitt Island, and continues downstream for 3281 ft, which is 492 ft downstream of the Ottawa navigation light number 238.5. |
|
The following links list up to five tab-delimited text files containing habitat data collected at several sites. An explanation of column headers in these files can be accessed at this link.
Reach -- General description of the sampled reach.
Transect -- Channel and bank measurements made along transects (cross sections) within each reach.
Channel features -- Measurements of bars, shelves, and islands at each transect (cross section).
Transect Points -- Channel and substrate measurements and observations at points along a transect (cross section).
|
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |