Circle Drive in West Springfield has historically experienced surcharge flooding. EP conducted hydraulic analyses that showed this was caused by an undersized outlet pipe creating a flow restriction, and from seepage in the adjacent embankment.
To fix the problem, EP designed an increased outlet pipe capacity, a slope relief drainage system and an improved double-grated inlet and manhole. Since the storm flow from the system ultimately discharges to Bagg Brook, EP presented this approach to the Conservation Commission for approval prior to construction.
