KOLKATA: Two Adani Power companies managed to secure a shade over one third of the total coal auctioned by Coal India under the Shakti scheme by offering discounts ranging between 1paise per unit and 3 paise per unit over their existing tariffs.Others in the race were GMR’s power arm GVK Power KSK Mahanadi Power and Sai Lilagar Power. They were among the 10 companies, including Adani, that collectively managed to secure 27 million tonnes of coal supply contract for 25 years on committing to generate power at discounts ranging between 4 paise per unit and 1paise per unit over their existing tariffs.Adani Power Maharashtra and Adani Power Rajasthan together secured supplies of 9.9 million tonnes of coal. The grade they have been allocated ranged from G6 and G13. It would be supplied from South Eastern Coalfields’ Korba, Mand Raigarh, and Korea Rewa mines, Mahanadi Coalfields’ Ib Valley, Basundhara and Talcher mines as well as from Western Coalfields and Northern Coalfields.Coal grade numbers are inversely proportional to their energy content. Highest grade on offer under Shakti was G4 and the lowest grade was G13.KSK Mahanadi Power managed to bag the second largest volume of coal at 6.8 million tonnes from four mine sources. It offered a discount of 4 paise per unit for 4.5 million tonnes of G12 grade that would be sourced from SECL’s Korba and Mand Raigarh mines. It also managed to secure supplies of 2.3 million tonnes at discounts of 2 paise per unit for a mix of G6 and G13 grade of coal from SECL’s Korea Rewa mines and Mahanadi Coalfield’s Ib Valley and Basundhara mines.The third largest allocation was made to Lalitpur Power Generation Company Ltd, which managed to secure 5.6 million tonnes of coal from SECL (Korea Rewa), NCL, Central Coalfields, MCL (Talcher, Ib Valley and Basundhara mines) and ECL by offering discounts of 4 paise per unit, 3 paise per unit and 1paise per unit for grades of coal that ranged between G4 and G13.Others like GMR Kamlanga Energy secured 1.5 million tonnes of coal while GVK Power bagged 1.7 million tonnes. ACB India managed to secure 200,000 tonnes of coal a year, Inland Power secured 67,400 tonnes of coal while Sai Lilagar Power Generation bagged supplies of 376,200 tonnes of coal.