“Comparative Cost Analysis of SuperArch Bridge and PowerArch Bridge”

This study presents a GAD-based comparative cost analysis of SuperArch and PowerArch bridge systems using SSR rates. The results show that the SuperArch bridge achieves a minimum cost of ₹5.23 Cr, which is approximately 7–10% lower than the PowerArch bridge (₹5.63 Cr) for comparable spans. The analysis clearly indicates that substructure components (abutments, piers, and foundation) are the dominant contributors to total cost. Reduction in the number of piers through span optimization leads to significant savings in excavation and concrete, making it the most effective strategy for cost reduction. Although the PowerArch system offers advantages such as larger span capability and modular construction, its cost is higher due to the arch ring system and use of advanced materials.   ·        SuperArch → Best for economical, medium-span bridges ·        PowerArch → Suitable for larger spans and advanced construction needs   This study provides a practical and field-oriented framework for selecting cost-efficient bridge systems using GAD and SSR-based estimation.

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