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Water-Year Summary for Site 05587498

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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Available Parameters
00065 Gage height(Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 

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USGS Water-Year Summary 2023
05587498 Mississippi River Pool Lock and Dam 26 at Alton,IL
LOCATION - Lat 38°53'14.3", long 90°11'02.4" referenced to North American Datum of 1983, Madison County, IL, Hydrologic Unit 07110009,
DRAINAGE AREA - --171,500 mi. sq.,approximately.
REVISIONS HISTORY - Revisions: Gage datum was updated to 399.66 ft NAVD88 on May 22, 2023, based on GNSS Level II survey using GEOID18.
SURFACE-WATER RECORDS
GAGE -
Water-stage recorder. Datum of gage is 399.66 ft above North American Vertical Datum of 1988.