Phase 1 requires replacement of wastewater pipe between Miami Beach and Fisher Island with 350 m-long x 1.9 m-diameter drive using microtunnelling between deep shafts. Phase 2 requires new 2.5 km x 3.8 m-diameter (8,000 ft x 12 ft-diameter) utility tunnel at 25 m below mean sea level under Government Cut shipping channel to accommodate three wastewater lines, one reclaimed water main and four utility ducts. Anticipated EPB drive with segmental concrete lining. Project requires 9 m-diameter launch shaft on Fisher Island and 7.6 m-diameter shaft on Miami Beach. For latest AECOM project presentation visit www.governmentcututilitytunnel.com/Publish/Data/Gov Cut - Information Exchange 121709.pdf. 38/10.
