# City of Key West Demandstar #ITB 26-019

Microtunneling and Pipeline Relocation Beneath Fleming Key Cut

**Posted:** October 15, 2026
**Respond By:** December 02, 2026
**Identifier:** ITB 26-019
**NAICS:** 237110, 237990

The City of Key West seeks a contractor to move wastewater and water pipelines underground beneath Fleming Key Cut using microtunneling and related construction work.
- **Buyer:** City of Key West, Florida; work is at Navy property at Trumbo Annex in Monroe County. No specific city department or contracting office is identified.
- **Scope:** Relocate an existing 30-inch influent wastewater pipeline and 8-inch water supply pipeline from aerial crossings on Fleming Key Bridge to an underground alignment.
- **Microtunneling:** Install approximately 458 feet of 72-inch steel casing using a microtunnel boring machine. Build watertight launch and receiving shafts, each approximately 30 feet in diameter and 45–50 feet deep.
- **Pipelines and related construction:** Install approximately 680 feet of open-cut 30-inch wastewater and 8-inch water pipelines, with tie-ins, manholes, valve vaults, grading, fencing, temporary road work, and restoration.
- **Future capacity:** The casing must accommodate the relocated pipelines and future 30-inch and 18-inch pipelines; the future lines are to be installed and capped approximately 5 feet below finished grade. The relocated pipelines are specified as fused C-900 pipe.
- **OEMs and vendors:** No manufacturers, OEMs, or product vendors are named in the solicitation.

### Description

The City of Key West seeks bids to relocate its existing 30-inch influent wastewater pipeline and 8-inch water supply pipeline from aerial crossings on Fleming Key Bridge to an underground alignment beneath Fleming Key Cut. The work includes approximately 458 feet of 72-inch steel casing installed by microtunneling, using shafts approximately 30 feet in diameter and 45 to 50 feet deep, and installation of the relocated pipelines and capped future pipelines within the casing. Additional work 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 for October 28, 2026; an optional site visit follows, subject to base access requirements.

[View original listing](https://www.demandstar.com/app/limited/bids/554021/details)