Keller & Kirkpatrick (K&K) has received a 2002 New Jersey Historic Preservation Award for the rehabilitation of two bridges in Somerset and Hunterdon Counties. The projects involved rehabilitation of two single-span truss bridges on Higginsville Road that together form the crossing of the south branch of the Raritan River between Hillsborough. The two bridges are considered remarkably intact examples of metal truss bridge engineering design of the 19th century. Prior to rehabilitation, the bridges were deemed structurally deficient and posted at a three ton weight limit. Somerset and Hunterdon Counties proposed that the bridges be preserved and rehabilitated to remain in services.