Flood Mitigation of Macomber\u27s Way in Marshfield, Massachusetts

Tidal flows in the English Salt Marsh flood over Macomber’s Way daily, creating dangerous driving conditions. Two culverts allow flow to pass through the causeway, which exacerbates scour of marsh banks and vegetation. A design to mitigate erosion and flooding was developed through analysis of water elevations and culvert flowrates throughout a tidal cycle. The recommended design includes a road maintenance plan, the replacement of an existing culvert with a concrete box culvert, and future consideration of a third culvert