New York City's tremendous success in revitalizing its waterfront will require about $ 100 million a year to meet new management and operating needs, according a new report by Regional Plan Association. Close to 700 acres and 58 miles of new waterfront parks, greenways and other public spaces are being created in all five boroughs. To ensure that this legacy is well maintained and managed in the public interest, the Association has recommended more than a dozen specific policy recommendations to ensure that responsible public agencies have the resources and authority to take a primary stewardship role.