Norwich — After decades of neglect, the Donald Alfiero Skate Park across from Norwich Technical High School is almost fully renovated, thanks to a partnership between local skaters, a Bridgeport-based skate park builder and the city. Though cosmetic work is still underway, skateboarders, BMX and scooter riders and roller skaters — who had long since abandoned the ramshackle park for other, more well-maintained counterparts in the region — have been making their return.