Perhaps this photo shows the transition from the misters cycle to the bollards cycle. No matter what, it shows the utter enjoyment of running through water on a sunny day. I took this photo on June 18, 2009.
Here's a definition for you: A bollard is a short vertical post. Originally it meant a post used on a ship or a quay, principally for mooring. The word now also describes a variety of structures to control or direct road traffic, such as posts arranged in a line to obstruct the passage of motor vehicles. The term can also be used to describe short, post-like light fixtures. I believe these bollards have lights in them.
From the City of Portland Web site:
Salmon Street Springs, Location: Waterfront Park, Naito Parkway at SW Salmon, Hours: 6:00 AM-10:00 PM during spring/summer/fall
Robert Perron Landscape Architects and Planners designed the fountain which was dedicated in 1988. A computer regulates the changing patterns of the water display. At full capacity, the fountain recycles 4,924 gallons of water per minute through as many as 137 jets at once. There are 185 jets. The three cycles of the fountain are called misters, bollards, and wedding cake.