Granite-Super Joint Venture, a partnership of Granite Construction and Super Excavators, has been awarded the contract to build the Big Creek Tunnel in Cleveland, Ohio. Granite announced the award on October 1, 2026, putting the contract at approximately $324.8 million; Tunneling Online reported that the joint venture was the low bidder among four at $324,821,130.
Who won the Big Creek Tunnel contract?
The Northeast Ohio Regional Sewer District (NEORSD) awarded the contract to Granite-Super Joint Venture, comprising Granite and Super Excavators. Granite’s October 1, 2026 announcement describes the award as approximately $324.8 million. Tunneling Online reported that NEORSD’s Board of Trustees approved the award on August 20 and that the joint venture submitted the low bid among four bidders: $324,821,130. That precise amount is the trade publication’s reported bid figure; Granite’s announcement gives an approximate contract value.
Granite Tunnel Division Vice President Jim Nickerson said, “The scale and complexity of this project align directly with Granite’s strengths in large-diameter tunneling and shaft construction.” That is the contractor’s characterization of its capabilities, not an independent assessment.
What work is included?
Granite says its scope includes 22,300 linear feet of 20-foot-diameter main tunnel and 3,115 linear feet of ancillary tunnels. The contract also covers the associated surface and underground infrastructure needed to connect and operate the system.
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- Shafts and diversion structures
- Gate and screening structures, plus gate control vaults
- Consolidation sewers and an overflow box culvert
- Sitework, restoration and utility work
Tunneling Online describes the system as capturing and storing sanitary sewage and stormwater from 11 combined sewer overflow outfalls. Its report says the rock tunnel will extend more than four miles, 50 to 100 feet beneath Cleveland, Linndale and Brooklyn.
How does Big Creek fit into Project Clean Lake?
NEORSD’s Project Clean Lake is a $3 billion, 24-year program that Granite says the sewer district began in 2011 to improve regional water quality. Big Creek is the final of seven large-diameter combined sewer overflow storage tunnels in the program, according to Granite.
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The tunnel-specific and program-wide pollution-control estimates describe different scopes. Granite estimates that Big Creek, once complete, will eliminate 550 million gallons of combined sewer releases annually. Tunneling Online reports a 4.5-billion-gallon annual reduction in combined sewer overflow discharges for Project Clean Lake as a whole. Both are forecasts, not reductions already achieved by this project.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When is construction expected to finish?
Granite forecasts construction starting in fall 2026 and completion in winter 2030. Tunneling Online’s August 2026 report says construction may continue through 2031. The dates are projections from different sources, so the expected finish should be treated as a schedule horizon rather than a guaranteed completion date.
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