Engineer: proposed drainage for 580 Valley Road would far exceed code minimums
The project's civil engineer told the Planning Board the revised site plan adds a trench drain and an underground infiltration system providing about 3,794 cubic feet of storage—over five times the ordinance requirement of 736 cubic feet—and said that should manage roughly a 10–15‑year design storm on the 0.36‑acre site while admitting flash floods are not fully preventable.
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Gerard Desario, the applicant's civil engineer, told the Planning Board the revised site plans add a trench drain and an underground infiltration basin intended to capture runoff that now flows to the municipal parking lot.
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