City of Key West Demandstar #ITB 26-019

Microtunneling and pipeline relocation beneath Fleming Key Cut

The City of Key West seeks a contractor to relocate water and wastewater pipelines beneath Fleming Key Cut using microtunneling and related construction work. - Government buyer: City of Key West, Monroe County, Florida; no specific sub-agency or office is identified. - Scope: Relocate an existing 30-inch wastewater influent pipeline and 8-inch water supply pipeline from aerial crossings on Fleming Key Bridge to an underground alignment beneath Fleming Key Cut, at Navy property in Trumbo Annex. - Microtunneling: Install approximately 458 feet of 72-inch steel casing using a microtunnel boring machine, with watertight launch and receiving shafts approximately 30 feet in diameter and 45–50 feet deep. - Pipeline and site work: Install approximately 680 feet of open-cut 30-inch wastewater and 8-inch water pipelines; complete utility tie-ins, manholes, valve vaults, grading, fencing, temporary road work, and restoration of disturbed areas. - Future capacity: The casing must accommodate future 30-inch and 18-inch pipelines, to be installed and capped about 5 feet below finished grade. The pipeline work references fused C-900 pipe. - OEMs and vendors: No manufacturers, OEMs, or vendors are named in the solicitation scope. - Notable requirement: The work includes construction beneath a channel and at Navy property; no additional technical standards or access details are specified in the available summary.

Description

The City of Key West is seeking bids to relocate its existing 30-inch wastewater influent and 8-inch water supply pipelines from aerial crossings on Fleming Key Bridge to an underground alignment beneath Fleming Key Cut. Work includes installing approximately 458 feet of 72-inch steel casing by microtunneling, with watertight launch and receiving shafts, and accommodating the relocated pipelines and capped future pipelines. The project also includes approximately 680 feet of open-cut pipeline installation, utility tie-ins, manholes, valve vaults, grading, fencing, temporary road work, and restoration of disturbed areas. A mandatory pre-bid meeting is scheduled at City Hall, followed by an optional site visit to Trumbo Point.

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