Location of Gage :

On forebay wall of Port Allen Lock at river mile 228.4, natural flow affected by tides at low water.   

Adjustment for vertical datum NAVD88 (OPUS 2019):  -0.71 ft. 
(e.g. add -0.71 to gage data to get to NAVD88 OPUS)

To adjust NAVD88 (OPUS 2010) values to 2007 Low Water Reference Plane (LWRP) datum relative to NAVD88, add -2.5ft.

 ** Raw data, subject to change **