Ohio Rev. Code § 5543.22
Notwithstanding sections 153.65 to 153.71 of the Revised Code, a county engineer may combine the design and construction elements of a bridge, highway, or safety project into a single contract, but only if the cost of the project as bid does not exceed five million dollars.
When required to use competitive bidding, the county engineer shall award a design-build contract in accordance with sections 307.86 to 307.92 of the Revised Code. In lieu of the requirement for plans, the county engineer shall prepare and distribute a scope of work document upon which bidders shall base their bids.
A county engineer may request the director of transportation to review and comment on the scope of work document or the construction plans for conformance with state and federal requirements. If so requested, the director shall review and comment on the document or plans.
R.C. § 5543.22