High Water Lock Information
Critical High Water Information
Locking in the ROCK ISLAND DISTRICT
STOP NAV data is approximate and varies with circumstances
Lock Pool Stage Tail Stage Other Gage Zero Swell Head
O'Brien          
Lockport 565.00 STOP Navigation due to LOW WATER - Pool pulled down by Power House (Not enough water over sill) 7,000 CFS and Above Industry Provided Helper Boat Required to Pull First Cut of Upbound AND Downbound Doubles.      
Brandon Road          
Dresden Island   496.53 Elevation and Above NO Upbound and Generally NO Downbound Doubles. Downbound doubles possible if industry provided helper boat takes them down the river to tie off. Outdraft High (15'-100' Dam Opening) Tows Warned    
Marseilles 484.48 (STOP Navigation - Water in Bull Gear Pits) 466.7 (RESTRICTION ON DOUBLES Water over Lower Wall) Don't Allow Use of Moorings in Canal for Waiting Out High Water(Just for Locking) See Navigation Notice 1-1996 Append. B.    
Starved Rock 461.5 (STOP Navigation - Water in Bull Gear Pits) 458.5 (RESTRICTION ON DOUBLES Water over Lower Wall) Outdraft High (25'-170' Dam Opening) Tows Warned    
Peoria 441.0 Elevation (dam goes down) OPEN PASS CONDITION 439.0 Elevation (dam goes down) OPEN PASS CONDITION Helper Boat at 5 foot of tainter gate opening. Elevations may vary slightly.    
LaGrange 429.5 Elevation (dam goes down) OPEN PASS CONDITION 426.5 Elevation (dam goes down) OPEN PASS CONDITION 442.0 Elevation Coast Guard Stopped Traffic for fear of levee damage    
11   STOP Navigation at 19.5 TW (Miter Gate Motors Removed) Outdraft Sign Displayed at 9.0 TW Helper Boat Recommended at 10.0 TW 588.20 0.33
12   STOP Navigation at 18.4 TW Outdraft Sign Displayed at 7.0 TW Helper Boat Recommended at 7.0 TW 580.20 0.43
13   STOP Navigation at 18.0 TW Outdraft Sign Displayed at 7.0 TW 568.70 0.37
14   STOP Navigation at 14.0 TW (Valve Motors Removed) Outdraft Sign Displayed at 7.0 TW Helper Boat Recommended at 9.0 TW. Helper Boat Required For: All Downbound Tows, and Upbound Doubles 70 ft, or w/ a Notch at 10.0 TW. For All Upbound Doubles at 10.5 557.08 2.1
15   STOP Navigation (Main Chamber) at 20.0 TW

STOP Navigation (Auxiliary Chamber Only) at 13.0 TW

 Outdraft Sign Displayed at 9.0 TW Helper Boat Recommended at 11.0 TW

Helper required for: All Downbound Tows, and Upbound Doubles 70 ft, or w/ a Notch at 13.0 TW.

 542.50 0.8
16   STOP Navigation at 17.0 TW (Water Over Lower Miter Gates) Outdraft Sign Displayed at 8.0 TW 533.60 0.43
17   STOP Navigation at 18.2 TW Outdraft Sign Displayed at 6.0 TW Helper Boat Recommended at 8.0 TW for loaded downbound doubles 526.70 0.22
18   STOP Navigation at 15.0 TW Outdraft Sign Displayed at 6.0 TW Helper Boat Recommended at 8.5 TW 518.52 0.56
19   STOP Navigation at 21.2 TW (Water Over Lower Wall) No Outdraft Sign 477.83 N/A
20 Lockwall Overtops at 19.6 Pool STOP Navigation at 18.0 TW Outdraft Sign Displayed at 6.0 TW Helper Boat Recommended at 8.0 TW 468.50 0.53
21 Upper Gates Overtop at 22.54 Pool Lockwall Overtops at 25.7 Pool STOP Navigation at 21.9 TW Outdraft Sign Displayed at 6.0 TW Helper Boat Recommended at 6.0 TW 457.80 0.74
22 Gate Pits Flood at 22.4 Pool Lockwall Overtops at 25.4 Pool STOP Navigation at 21.4 TW Outdraft Sign Displayed at 8.0 TW Helper Boat Recommended at 8.0 TW 446.10 0.53

Questions and Comments
Mississippi River POC
William.T.Gretten@usace.army.mil
(309) 794-4512		 Illinois Waterway POC
Rick.D.Granados@usace.army.mil
(309) 676-4601		 Website Technical POC
WebManager@usace.army.mil
  Locks and Dams Phone Numbers  
  General Corps POC
cemvr-cc@usace.army.mil
(309) 794-4200		  

External Link Disclaimer

Solely for ease of reference to related data, this site contains hyperlinks to a number of external web sites and/or information created and maintained by other public or private entities. The US Army Corps of Engineers neither controls nor guarantees the accuracy, relevance, timeliness, or completeness of any external sites or information, and the agency expressly reserves sole discretion to establish or remove external links from the server at any time. Further, the inclusion of links to particular external sites is not intended to reflect their importance or to endorse any views expressed, products or services offered on those sites, or the organizations sponsoring the sites.

Privacy and Security Notice