US Army Corps of Engineers
Little Rock District

MKARNS Nav Notice No. SWL 15-08 Increased Differentials on the White River Entrance Channel

Published April 6, 2015
Navigation Notice

Navigation Notice

This is to advise mariners transiting the White River Entrance Channel (WREC) of increased head differentials between Norrell Lock and Dam and Montgomery Point Lock and Dam.  At 12 noon today, the tailwater elevation at Norrell Lock and Dam was 146.45 ft-msl and the headwater elevation at Montgomery Point Lock and Dam was 143.54 ft-msl with a differential of 2.91 feet.  The WREC differential is forecasted to reach 3.5 to 4 feet by Thursday, April 9.  These higher differentials are expected to decrease after April 9th.  Mariners are reminded of advised tow restrictions during increased differentials:

WREC Differential                   # Barges

2.9 feet or less                    no restriction

3.0 to 4.4 feet                     12 barge down bound restriction

                                            No restriction up bound

4.5 to 5.0 feet                     9 barge down bound restriction

                                           No up bound restriction

5.1 to 5.9 feet                     4 barge down bound restriction during daylight

                                           2 barge down bound restriction during night

                                           No up bound restriction

Mariners transiting the WREC should use extreme caution in this area, especially when passing Montgomery Point Lock and Dam.  Contact Montgomery Point Lock and Dam or Norrell Lock and Dam for current differential and elevations or visit our website at http://www.swl.usace.army.mil/Missions/WaterLevels.aspx

Questions or requests for additional information concerning this notice should be directed to James McKinnie in the Little Rock District Office, at (501) 324-5739 or (501) 324-5096, or you may email CESWL-OP-OM@us.army.mil.

 

//signed//

Kevin J. McDaniels

Chief, Operations Division
Contact
Little Rock District Operations Technical Support Branch
501-324-5739
ceswl-op-om@usace.army.mil
or
James McKinnie
501-324-5096

Release no. SWL 15-08