COMMAND CENTER RELIABLY MONITORS TEMPERATURES IN HISTORIC BRIDGE REPLACEMENT CASE STUDY The Goal: Reliable Temperature Monitoring The historic Mitchell River drawbridge in Chatham, Massachusetts was one of the last remaining timber drawbridges in the US. After it was deemed structurally deficient, an extensive process for a new design began. The winning design incorporated the traditional materials along with newer, more durable materials. The new bridge is made with an engineered lumber superstructure and a steel and concrete substructure. The project required multiple mass placement concrete pours—with the largest at 165 cubic yards—as well as cold weather placements. SPS New England was required to monitor the concrete’s internal temperature and temperature gradients. Log

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