A joint venture of Salini Impregilo/Healy was the low bidder for the Northeast Ohio Regional Sewer District (NEORSD) Dugway Storage Tunnel (DST) project. The JV entered a bid of $153.3 million. Other bids, which were opened Sept. 10, included Southland Mole Johnson Bros., $155.5 million; McNally/Kiewit Dugway JV, $170.3 million; Kenny/Obayashi III JV, $188.6 million; and Jay Dee/Frontier-Kemper JV, $208.8 million.
The Dugway Storage Tunnel project includes the installation of a 24-ft diameter storage tunnel extending approximately 15,000 ft in length from its connection to the Euclid Creek Tunnel (ECT) at the Nine Mile Site to its terminus near Superior Avenue/ Lakeview Road. The tunnel will be constructed with a tunnel boring machine (TBM) in Chagrin Shale at depths approaching 200 ft below ground level. The DST will also include several consolidation sewers, diversion structures, and drop shafts to capture and store CSO from the DST service area. The diversion systems feeding the drop structures will be equipped with the inflow control gates to manage the dynamic flow within the ECT/DST tunnel system. The estimated cost was $179 million.