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Mississippi River at Lock and Dam 21 (Quincy,IL)
Stream Name: Mississippi River
Gage Zero: 457.80 Ft. MSL 1912
Flood Stage:17 Ft.
Record High Stage:31.30 Ft.
Longitude: -91.42904167
Latitude: 39.90380833
Flat Pool : 12.20
Flat Tail : 1.70
River Mile: 324.9 miles above the mouth of the Ohio River
Record High Stage Date: 07/13/1993

Drainage Area : 135000.00 Mi2
Location of Gage :

Pool No. 21 extends from Quincy, IL. 18.3 river miles upstream to Canton, MO. Lock and Dam 21 is located 2.1 river miles downstream of the Quincy Highway 24 bridge. Access is via Lock and Dam Road off of Highway 57.

The National Weather Service information is also linked in the Additional Links for this station.

This gage is operated by the US Army Corps of Engineers (Rock Island District).

Latest Data
10/17/2017 02:00 Central
Latest Stage11.36 Ft.
24 Hr. Change+0.46 Ft.
Tomorrow's Forecast
(Issued 10/16/2017 11:34)
12.40 Ft.   Plot Tomorrow's Forecast
Last Year's Stage12.82 Ft.
Today's Historic Normal Stage4.19 Ft.
Today's Historic Max Stage18.10 Ft.
Today's Historic Min Stage1.79 Ft.
Latest Pool Level12.59 Ft.
24 Hr. Change-0.27 Ft.
Last Year's Pool Level13.77 Ft.
Latest Flow136,710 CFS
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Additional Links:
View Record Stage High / Lows
Flow Calculator for L&D 21
Vessels Queued at Lock 21
Historic Flood Profiles (Pool 21)
Water Transparency
WebMET21
Official National Weather Service information for this station
Real-Time SHEF Report
US Army Corps of Engineers - Rock Island District - Water Control Center - Contact Us