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Published February 24, 2026 at 7:00 PM
Updated February 25, 2026
Site work for a bridge / tunnel in Columbus, Ohio. Design plans call for site work for a bridge / tunnel.
The Three Creeks Relief Tunnel is a major sanitary infrastructure project intended to relieve hydraulic overload in the Big Walnut Outfall system caused by upstream development. The project includes full tunnel design, geotechnical reporting, and construction-ready documentation. The project will design and construct a relief tunnel running parallel to the Big Walnut Outfall, between: - the BBX chamber, and - the Alum Creek Trunk Sewer This alignment will mitigate overload and improve system performance. The project is included in the City's 2026-2031 Capital Improvement Program (CIP). As of February 24, 2026, a design engineer has been selected. *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available.
Design
Bridges / Tunnels
$244,000,000.00
Public - City
Site Work
We’ve obtained documents for this project and are currently processing them.
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September 1, 2027
Multiple Locations, Columbus, OH
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