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100-Foot Deep Utility Tunnel – Port of Miami

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Abstract:

This paper describes a 70-million project that will deepen a critical 30-year old 54-inch collection system sewer force main below the shipping channel of the Port of Miami. The impetus for this project is the deepening of the Panama Canal, which will ultimately result in larger, “Post-Panamax” ships engaged in commerce, hence requiring deeper ports. The project consists of lowering the existing utilities before the dredging operation; a 20-inch water main and an aging 54-inch sewer force main serving the urban community of Miami Beach. The deepening of the sewer main, the subject of this paper, requires a 72-inch diameter micro-tunnel from Fisher Island to an in-water shaft south of Miami Beach. This paper describes methodologies considered for installation, and unique design and construction features of the design-build project, including the tunneling approach, shaft design, tunneling equipment, and force main tie-in, as well as project scheduling, permitting, and environmental protection.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864712811710371

Publication date: 2012-01-01

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