How do navigation locks work

This video details why navigation locks are needed, how navigation locks work, and also discusses the benefits of using a tow haulage system.

1. The video begins by discussing the Arkansas River Navigation System (MKARNS) from the confluence with the Mississippi River to the the Port of Catoosa near Tulsa, Oklahoma.

2. The video then moves to showing the equivalent volume that a barge can move when compared to a rail car or a truck. It answers the question of how much can a barge move?

3. The video then moves into why navigation locks and dams are needed and how they provide sufficient navigation depth or draft. The next topic shows how navigation locks work.

4. The video then moves into the efficiency gained by using a tow haulage system at a lock.