Thursday, January 14, 2021 It is not often that a federal district court limits an expert witness’ s proffered testimony on the ground that the expert is not qualified to offer it, and it is also uncommon for a court to exclude expert testimony on the ground that it would not assist the trier of fact. However, the Western District of Louisiana recently limited a proffered engineering expert’s testimony on both of those grounds. In Terral River Service, Inc. v. SCF Marine, Inc., No. 3:19-CV-00406, Plaintiff purchased a barge from Defendant and later found it partially submerged due to a fracture in the bow. The parties disputed the timing of the fracture, with Plaintiff alleging that it existed prior to delivery of the barge. Plaintiff offered as an expert witness a metallurgical and mechanical engineer with experience in evaluating barge fractures.