Bridge construction project stays on track with engineered filtration system PumPs • Tanks • FilTraTion • PiPe • sPillguards 800 742 7246 rainforrent.com BACKGROUND Construction worth more than half a billion dollars needed to meet stringent water discharge regulations for a new bridge connecting Minnesota and Wisconsin. Water contamination from drilling bridge pier foundations needed to be treated and filtered to meet 25 NTU discharge requirements or the project risked losing $198,000 per day in labor costs. The water treatment system had to filter sediment, drill slurry and concrete from drilling into bedrock. Due to the project’s high media profile and the river being a national scenic waterway, meeting and exceeding environmental regulations when discharging the water was vit

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