Big Walnut Trunk South Rehabilitation

The City of Columbus, Division of Water Reclamation, is soliciting proposals for professional engineering services for the Big Walnut Trunk South Rehabilitation project. The scope involves the assessment and rehabilitation of approximately 11,840 linear feet of large diameter trunk sewer, ranging from 90 to 96 inches, located along Big Walnut Creek between manhole 0251S0345 north of Interstate 70 and manhole 0145S0004 north of East Williams Road. The selected consultant will evaluate existing data to determine the preferred rehabilitation methods and segments for detailed design, which is expected to result in the issuance of two separate construction contracts. Proposals must be submitted exclusively through the Bonfire portal by December 4, 2026, at 1:00 PM Eastern Time, with a deadline for questions set for November 18, 2026. The engineer is required to maintain accounting records for three years following final payment and must submit detailed monthly invoices accompanied by progress reports and affidavits of payment for subcontractors. The contract mandates strict adherence to professional standards of care, Ohio Revised Code 163.03 for property access, and O.R.C. Section 3517.13 regarding campaign contributions. Additionally, the contractor must provide commercial liability insurance naming the City as an additional insured and comply with non-discrimination and equal opportunity employment practices.