A large, $18 million stormwater vault underneath Cardinal Elementary School in the flood-prone Westover neighborhood is now complete. The vault responds to community concerns that arose after significant flooding washed over Westover in July 2019. Arlington County will mark the completion of the vault with a ribbon-cutting this Saturday during a neighborhood festival at the school, The Westover neighborhood's flooding problem may be solved following the completion of a 47,000-square-foot stormwater vault that sits underneath Carindal Elementary formerly Reed Elementary.