Class is in session! The fifth episode of Hydro 101, a sub-series of the Dam! podcast, has arrived. Hydro 101 aims to provide you with a fundamental understanding of hydropower and how it interacts with energy and the environment–particularly in the Northwest. This episode explores the infrastructure responsible for solving vertical challenges on the water, the lock, from the historical development of the technology to an explanation of how a modern lock works like a water elevator.