https://www.archdaily.com/165327/kap-686-skate-park-metrobox-architekten – Interesting backstory, concept & methodology to keep it clear from floodwater, smooth and not slippy underfoot. The huge site is nestled between a main rail line, bike path and waterfront has a lot in common with the site for Blackrock.
Google Maps link
https://designtaxi.com/news/350484/An-Urban-Skatepark-Built-on-a-Flood-Plain/