Pentucket Bank closes its main branch today and opens a temporary downtown office as well as a revamped Riverside branch—all in preparation for a $160 million downtown Haverhill redevelopment. The long-considered plans, first reported by WHAV more than two years ago and confirmed last year, are now taking shape following developer Salvatore N. Lupoli’s closing on city and bank land. The mixed-use housing and retail project covers White’s Corner through the entirety of what is known as the Herbert H. Goecke Jr. Memorial Parking Deck. Pentucket Bank CEO Jonathan H. Dowst and President Eric G. Leuteritz detailed the plans Tuesday morning for WHAV listeners. “We’ve been planning our stadium branch renovation for quite some time.