This is not WSH. This is Manchester Park in Port Orchard, WA.
Here is a little history on the park:
The park was named for the nearby small town of Manchester. Originally called "Brooklyn," the citizens renamed the place "Manchester" in 1892 on account of their expectation that Manchester, Washington would become an active seaport comparable to Manchester, England.
The park itself was constructed at the turn of the century as a U.S. Coast Artillery harbor defense installation for the protection of Bremerton. During World War II, the property was converted to a navy fuel supply depot and a navy fire-fighting station.
A former torpedo warehouse, built in 1901, still stands in the park. It was later an officer's club, a barracks and a mess hall, and is now a picnic shelter in the day-use area. The small concrete building east of the torpedo warehouse was originally used as a mining casement, and later for coal storage. A gun battery also remains from the park's early days. All three of these structures are on the register of National Historical Monuments.