Arihant Drillings emerges as L1 bidder for geotechnical investigation (core drilling) for Rouni Pumped Storage Project in Chhattisgarh July 3, 2025 | Project Updates Arihant Drillings Private Limited has emerged as the lowest bidder (L1) by quoting Rs 17.76 million for geotechnical investigation (core drilling) works for the Rouni Pumped Storage Project. This content is restricted.