A detailed analysis of several flood defense strategies was conducted. Alternative 1 was the least costly based on initial construction costs, which is being implemented by AIT due to the urgency and available funding constraint. The following ranking is based on 50-year life cycle costs.
Alternative 1: Strengthening and raising of the existing dike to 3.4 m, Rank 2
Alternative 2: Reinforced concrete sheet pile panels with deeper steel H piles, Rank 4
Alternative 3: Reinforced concrete sheet pile panels without steel H piles, Rank 3
Alternative 4: Composite Fiber Reinforced Plastic (FRP) sheet pile panels, Rank 1
Alternative 4 (FRP sheet pile panel wall)