Standing at the heart of Riverfront Park Saturday morning, Mayor Bill Saffo declared Nov. 18 Riverwalk Day to signify the completion of more than 30 years of work on the popular destination. It was an appropriately bustling morning on the 1.75-mile stretch of boardwalk as the mayor’s proclamation came down. As Saffo spoke, the final Water Street farmer’s market of the year was in full swing to his left, while sightseeing tours of the Cape Fear River departed from the dock to his right. Ed Wolverton, president of Wilmington Downtown Inc., spoke about the economic value of the riverwalk to the downtown area, which is on pace to attract $1 billion in investment this decade. Wolverton said the riverwalk stands as a link between the historic district to the south and new development happening on the north end, where the $20 million North Waterfront Park and more residential and retail spaces are in the works.