A port expert contracted by the St. Johns Riverkeepers has determined that the project to deepen the St. Johns River to 47 feet is not worth the investment. However, local experts are pushing back.

Asaf Ashar, a consultant and professor with the National Ports & Waterways Initiative at the University of New Orleans, conducted his own cost-benefit analysis of the project, and his findings fall far below those of the U.S. Army Corps of Engineers. The corps calculated a return of $2.66 for each dollar…