What is the least depth south of south dolphin at Pier 11?

The least depth south of South Dolphin at Pier 11 being 26 feet indicates that this measurement is crucial for navigational purposes and determining the suitability of the waterway for various vessels. A depth of 26 feet is typically adequate for accommodating a range of larger ships or barges that might need to dock or maneuver in that area.

This depth can be particularly important in planning for shipping, ensuring that vessels do not run aground and that they can safely access the dock without risk of grounding during low tide. The measurement is impacted by factors such as tidal variations, sediment accumulation, and dredging activities, meaning that 26 feet is the minimum depth that would be consistently available for safe navigation.

The other choices reflect depths that are either greater than the minimum necessary for safe navigation, which means they do not represent the least depth, or they could be considered for future projects or considerations, but the specific question asks for the least depth, making 26 feet the correct and most relevant answer in this context.