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 12:00 p.m. today, the tailwater elevation at Norrell Lock and Dam was 124.44 ft-msl and the headwater elevation at Montgomery Point Lock and Dam was 121.35 ft-msl with a differential of 3.09 feet. The WREC differential is forecasted to hover near 3.0 feet for the next 10-14 days before receding. Mariners are reminded of advised tow restrictions during increased differentials shown below:

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 restriction up bound

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 https://www.swl-wc.usace.army.mil/pages/arkansas_river_projects.htm 

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

Original source can be found here