Topline Infra emerges as L1 bidder for implementation of Sultanganj-Dardmara Border Road Project in Bihar July 31, 2026 | Awarded, Project Updates Topline Infra Projects Private Limited has emerged as lowest bidder (L1) for implementation of the Sultanganj-Dardmara Border Four Laning Road Project (SH-22) (40 km-98.865 km). This content is restricted.