A milestone today for the Highland Park Spraypark project – it has officially gone out to bid. At one point, Seattle Parks had hoped it might be built and open this summer, but when we followed up last month with project manager Kelly Goold, he said it wouldn’t be ready to open before next season after all. The spraypark will be built at the site of the old wading pool, closed almost four years. It started as a simple conversion plan but Highland Park’s Carolyn Stauffer led a successful push to get Parks and Green Spaces Levy money to enhance the project. The request for bids has just been published, and it gives would-be bidders till September 12th, when bids will be opened.