In order to improve safety of this failing structure, Oates was hired to design a bridge replacement. The solution was a three-sided precast concrete structure over Canteen Creek. Construction staging was complicated by the need to install a temporary shoring wall consisting of steel “H” piles and timber lagging.

The existing roadway geometry, with Mill Hill Road and Bethel Road forming a “T” intersection, provided a challenging bridge layout. Canteen Creek runs parallel to Bethel Road and the bridge is immediately adjacent to the intersection. The local agency requested a cost effective bridge with minimal disruption to local traffic and minimal length of construction and road closure. Traffic staging was analyzed including a load investigation of the existing bridge. Due to the poor condition of the existing structure and its geometry, stage construction was not feasible; therefore, it was necessary to close the bridge, causing a lengthy detour for local traffic and school buses. Several bridge alternates were investigated and the solution was a 42' precast three-sided box culvert. This precast option provided an economical solution and expedited the construction duration versus a typical cast-in-place deck bridge.

In addition a Bridge Condition Report, Hydraulic Report and complete plans were prepared for the replacement of this structure. Services provided include shop drawing review, construction observation, testing and staking, and field surveys.

Project Stats

Mill Hill Road Bridge
Collinsville, Illinois
Construction Cost: $900,000
Completion Date: 2003
Client: City of Collinsville