Case story
Manitowoc River
USA, Wisconsin
Lunda Construction was subcontracted by Michels Corporation to drill 35 foot diameter down-shafts to facilitate the installation of a pipeline between the Manitowoc River and the Fox River in De Pere, WI. Two 4” submersible pumps (approximately 500 gpm) were used to pump out water from each flooded shaft.
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Shafts were flooded on purpose to suppress explosive blasts in the rock of the down-shafts during excavation. A 40 mg/L total suspended solids (TSS) permit limit was issued for this project by Wisconsin DNR, limiting the liquid residuals to be discharged to any surficial receiving systems. Geotube® dewatering technology was selected to retain the solids while ensuring the water discharge levels were met.
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