At the Ballard Locks
The locks interface between the puget sound (saltwater, low level) and lakes union, washington, and sammamish (freshwater, high level)
![At the Ballard Locks](/photo/2006/05/22/at-the-ballard-locks.jpg)
The locks interface between the puget sound (saltwater, low level) and lakes union, washington, and sammamish (freshwater, high level)