Workers stand on beams above the Merrimack River on Thursday. Construction of temporary work platforms for Concord’s Sewalls Falls Bridge replacement project took up most of the day. ELIZABETH FRANTZ / Monitor staff
Workers stand on beams above the Merrimack River on Thursday. Construction of temporary work platforms for Concord’s Sewalls Falls Bridge replacement project took up most of the day. ELIZABETH FRANTZ / Monitor staff

Construction of temporary work platforms for the Sewalls Falls Bridge replacement project continues in Concord on Thursday.