A comprehensive study to evaluate effects of the Lake Pontchartrain and Vicinity Hurricane Protection Plan on the tidal prism and circulation in Lake Pontchartrain, hurricane surge levels, and water quality is being conducted by the U.S. Army Engineer Waterways Experiment Station under sponsorship of the U.S. Army Engineer District, New Orleans. This report, second of a series, presents results pertinent to a detailed investigation of the three major arteries leading into the lake, namely, The Rigolets, Chef Menteur Pass, and the Inner Harbor Navigation Canal.