Behind the scenes and beneath the surface
Project Manager
Jewels Stover

The Westerly Storage Tunnel

Cleveland, OH

The Westerly Storage Tunnel Project is part of Project Clean Lake, the North East Ohio Regional Sewer District’s program designed to reduce pollution in Lake Erie by 4 billion gallons over the next 25 years.

When it's finished in 2020, the tunnel will be between 200 and 250 feet underground, 25 feet in diameter and almost 2 miles long! It will manage higher flow volumes, keeping stormwater out of the combined sewer system and reducing overflow occurrences.

Working under general contractor JayDee-Obayashi JV, Nicholson’s value-engineered proposal and eventual $7 million contract included installing three diaphragm wall shafts that act as support of excavation systems (SOE) for the tunnel boring machine’s entry and retrieval shafts and a vent shaft, plus the SOE system for an attached gate structure at the launch shaft.

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