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# ALCOSAN Breaks Ground on $1 Billion Ohio River Tunnel Project
- URL: https://www.industrialbriefs.com/alcosan-ohio-river-tunnel-project/
- Published: 2026-10-23T18:00:32.000Z
- Updated: 2026-10-23T18:00:44.000Z
- Description: ALCOSAN's Ohio River Tunnel project begins, aiming to reduce sewer overflows by seven billion gallons annually. The $1 billion initiative offers significant opportunities for AECM professionals in construction and compliance.
- Author: IndustrialBriefs
- Tags: construction, engineering, government, #enriched

![IB_KEY_FACTS:[{"stat":"$1 billion","label":"Contract value for Ohio River Tunnel","sublabel":"Awarded to Steel City Tunnel Partners, a JV between The Lane Construction and Brayman Construction."},{"stat":"4.9 miles","label":"Length of the Ohio River Tunnel","sublabel":"Includes six construction sites in Pittsburgh and two in McKees Rocks."},{"stat":"7 billion gallons","label":"Annual reduction in sewer overflows","sublabel":"Achieved by directing excess flows to ALCOSAN’s treatment plant."}]](https://industrial-briefs.ghost.io/favicon.ico)

The Allegheny County Sanitary Authority (ALCOSAN) has commenced construction on the Ohio River Tunnel, a pivotal component of a larger initiative designed to mitigate sewer overflows and enhance water quality in Pittsburgh's river systems. This marks the start of a comprehensive three-tunnel system that aims to significantly reduce wet-weather sewer overflows by directing excess flow to ALCOSAN’s treatment facilities.

**What Happened**  
ALCOSAN's ambitious Ohio River Tunnel project is officially underway, with Steel City Tunnel Partners—a joint venture between The Lane Construction and Brayman Construction—taking the lead on the [$1 billion construction contract](https://www.industrialbriefs.com/wadsworth-center-laboratory-steel-framework/). This 4.9-mile tunnel will feature six construction sites in Pittsburgh and two in McKees Rocks, with its main trajectory extending from the North Shore to the treatment plant. The tunnel will collect and channel flows from the Saw Mill Run and Chartiers Creek areas.

The project is a crucial part of ALCOSAN's Regional Tunnel System, which is included in its Clean Water Plan. This plan encompasses not only tunnel construction but also treatment plant expansion and green infrastructure initiatives under the GROW program. ALCOSAN recently boosted its wet-weather treatment capacity to 480 million gallons per day, a significant increase that aligns with key compliance mandates under its Consent Decree, reducing sewer overflows by an additional 3.4 billion gallons annually.

**What This Means for Your Business**  
For AECM professionals and government contractors, the Ohio River Tunnel project represents a [significant opportunity in terms of contracts](https://www.industrialbriefs.com/clancy-hampshire-water-infrastructure-contract/) and procurement. The $1 billion investment underscores a substantial market for construction firms specializing in large-scale infrastructure projects. Companies involved in tunnel boring, civil engineering, and environmental compliance will find lucrative prospects in this multi-tunnel initiative.

Compliance is also a critical consideration. AECM firms must align with stringent environmental standards and regulatory requirements, such as those outlined in the Consent Decree. The increased treatment capacity at ALCOSAN’s facilities highlights the growing need for innovative solutions in water management and infrastructure resilience, presenting a competitive advantage for firms at the forefront of these technologies.

**What US Operators Should Watch**  
Decision-makers should closely monitor the timeline for the arrival of the tunnel boring machine, slated for late next year. This milestone will be crucial for project progression and offers a window for firms to engage with ALCOSAN and its partners. Additionally, staying informed about federal funding opportunities and compliance deadlines related to wet-weather treatment and green infrastructure will be essential for maintaining a competitive edge in the market.

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*Source: https://www.worldconstructionnetwork.com/news/alcosan-ohio-river-tunnel/.* [*Read the original story ->*](https://www.worldconstructionnetwork.com/news/alcosan-ohio-river-tunnel/?ref=industrialbriefs.com)