Concert needs to dry and work is still being done. Stay off the skatepark or you will ruin it.
“ATTENTION: The concrete should be kept damp and free of traffic for at least 28 days. With the anticipation that surrounds the construction of a skatepark this may be difficult, but the slow undisturbed cure process is critical to keep cracking to a minimum. Although hardened concrete appears to be cured within a few days the appearance is deceptive as the concrete is still quite fragile. At a minimum the concrete should be allowed to cure for 7 days before being used, but we strongly recommend a full 28 day cure daily saturating the area with water in order to keep random cracking to a minimum. We also find that having lawn sprinklers saturating the park during daylight hours actively discourages unauthorized use. Your patience will pay off in the long run. [LINK]