The city celebrated an important reconnection to the Sacramento River Wednesday with the grand opening of the Docks Riverfront Promenade. More than 100 people — from cyclists and dog walkers to the city staff and contractors who made it happen — converged on the sunny, tree-lined promenade overlooking the green river to mark the completion of the parkway's $5.4 million first phase. Many rode a California State Railroad Museum train along its relocated track from Old Sacramento to the new Pioneer Landing Park, where the celebration began. The promenade and park, with its landscaped public plaza and giant water sculpture, were built to stimulate redevelopment of an old industrial brownfiel