This photo was sent in by JF. He writes: "These urinals can be found in the outbuilding on the north side the locks. Open to the visitors."
The Locks' website proclaims: "100 years ago, The Locks and Ship Canal were built by Seattle and the Corps of Engineers as a commercial navigation route to develop the City of Seattle. Today the Hiram M. Chittenden (aka Ballard) Locks are the Nation's busiest with nearly 50,000 vessels/yr. "locking through”. Boats can lock thru 24 hours/day, except during maintenance. The Locks are a Seattle Icon, National Historic Site and a top tourist site attracting over 1.3 million visitors/yr. The Grounds are open for visitors from 7:00am to 9:00pm. No fees are charged for visitors, commercial ships or private boats. Even guided tours and summer concerts are free."