in Bridges, Design/Build 2 Apr Design/Build delivery helps Union County design, construct and open three bridges to traffic in six months. Project Type: Bridge Replacement Client: Union County Engineer Construction Cost: $1,800,000 Delivery Method: Design/Build KZF Design provided engineering for the replacement of the Industrial Parkway Bridge (UNI-CR1-0636), Middleburg-Plain City Road Bridge (UNI-CR57-0293) and the Leeper-Perkins Road Bridge (UNI-CR194-0103). An arch top culvert was used to replace the Industrial Parkway Bridge. Simple span adjacent box beam structures were used on the Middleburg-Plain City Road and Leeper-Perkins Road Bridges. The work included hydraulic analysis, engineering, final plans, as-built plans and load ratings.