EBORI Extension, Gest Street Tunnel

Summary (Newest Update)

Background The EBORI Extension project is initiated by the Office of Procurement in Cincinnati, Ohio, with a focus on enhancing the stormwater management system through the construction of the Gest Street Tunnel. The project aims to improve infrastructure resilience against flooding and manage stormwater flow effectively. This solicitation is part of ongoing efforts to upgrade the city's sewer systems and ensure compliance with environmental regulations. Work Details The contract includes the following key components: 1. **Structural Geopolymer Lining System**: The contractor must provide a geopolymer material that has passed the DIN-19573 Chemical Corrosion Resistance test for a 1000-foot section conveying storm flow. Substitutions for GeoSpray HCE material are allowed under certain conditions. 2. **Ground Improvements**: Ground improvements are required for approximately 60 LF of a 60-inch pipe and 45 LF of a 36-inch pipe, with CIPP liners mandated in specified areas instead of structural geopolymer lining systems. 3. **Construction Sequence Documentation**: The contractor must document all phases of construction through photographs, including pre-construction, progress, and completion images, adhering to specific guidelines regarding image quality and submission formats. 4. **Measurement and Payment Items**: Various bid items include site fill and grading at the launch shaft site, tunneling for an ID storm sewer, and mobilization activities for the Tunnel Boring Machine (TBM). Payment structures are detailed based on unit prices and specific conditions outlined in the solicitation. Period of Performance The contract period spans from January 20, 2026, to February 3, 2026, with specific milestones set for various phases of work throughout this timeframe. Place of Performance The work will be performed primarily in Cincinnati, Ohio, specifically along Gest Street where the tunnel extension is planned. Bidder Requirements Bidders must comply with specific requirements including certifications related to M/WBE or SDVOSB status if applicable. They must also possess necessary licenses and insurance as stipulated in the contract documents.