Workers for J. Harman Saunders Construction, Inc. make headway on foundation work at 715 Wilborn Ave. in South Boston on Thursday morning for the future location of the SOVA Innovation Hub. Microsoft and Mid-Atlantic Broadband Communities Corporation are partnering to bring the technology center to South Boston. Work with structural steel at the site is anticipated for March, and construction on the hub is expected to take the rest of 2020, weather permitting.