The Missouri Department of Transportation’s (MoDOT) Fixing Access to Rural Missouri (FARM) Bridge Program Design-Build project was a $21.5 million initiative to replace 31 deteriorating, weight-restricted bridges in the Northwest and Northeast Districts. These aging one-lane bridges posed safety risks and traffic limitations on rural two-lane roads, making their replacement critical. Completed one month ahead of schedule in September 2023, the project was delivered in under two and a half years by implementing cost-effective methods such as eliminating field splices, using lighter girders, and optimizing construction sequences to stay within budget.

A key innovation was the use of the Simple for Dead Load-Continuous for Live Load (SDCL) Steel Girder Design Methodology, which minimized the need for grade raises and allowed for more bridge replacements. The use of friction H-Pile further extended the project’s reach by mitigating price volatility. To ensure longevity, the new bridges were designed with an estimated 100-year service life, incorporating galvanized girders and continuous concrete decks to reduce future maintenance costs.

Public convenience was prioritized through an accelerated construction strategy that employed full road closures, well-planned detours, and effective community engagement to minimize disruption. The project also adopted several innovations, including a modified Nebraska Department of Transportation (NDOT) detail that allowed for quicker placement of approach slabs, resulting in smoother driving surfaces. Reinforced concrete box culverts were used in place of some bridges, reducing future maintenance burdens for MoDOT. Additional innovations, such as single-stage abutment caps, reusable traffic signage, and hydronic heat technology for winter concrete work, helped expedite construction and overcome seasonal challenges.

The MoDOT FARM Bridge Program Design-Build project is a testament to the effective application of innovative design, construction methods, and project management strategies in public infrastructure development. By leveraging industry standards and introducing novel techniques, the project team delivered high-quality, long-lasting infrastructure improvements that significantly enhance rural mobility and safety in northern Missouri. The project not only met but exceeded MoDOT’s expectations, providing the state with durable, low-maintenance bridges that will serve its rural communities for generations to come.