Cudnem-Dignem-Surla deposit: The deposit extends from a point 2.25 km south-west of Onda and west of the Onda Usgno road in the north-west of Surla hill, located about 1 km east of Dergunvado in the south-east. The deposit has a length of about 3.5 km and a width ranging from 100 m in the south-eastern portion to about 60 m in central portion and about 220 m in the north-western portion. At one place in south-east, the deposit pinches out completely for a short distance. The grade of the ore is seen to distinctly deteriorate towards south-east.

RL’s operations consist of two major iron ore mining areas, one in Bicholim and the other in Surla, both located in North Goa and which together account for approximately 90.0% of SRL’s total estimated iron ore reserves as of 31 March 2016. The Bicholim mine consists of five contiguous mining leases covering an area of 479.3 hectares in the north of Goa. The Surla mine consists of three contiguous mining leases covering an area of 253.4 hectares in the recognized iron ore belt of Pale-Velguem-Bicholim-Shirgao in the north of Goa. Mining operations started at the Bicholim mine and the Surla mine in 1958. Processed ore from the Bicholim and Surla mines is transported by SRL to loading jetties at Sarmanas and Surla/Sinori in north of Goa, and then loaded into barges and sent to Mormugao port in Goa, India, where it is then shipped to customers. SRL’s mining assets include processing plants, barges, jetties, transhippers and loading capacities at the Mormugao port.

Processed ore from the Surla mine is transported by SRL to loading jetties at Sarmanas and Surla/Sinori in north of Goa, and then loaded into barges and sent to Mormugao port in Goa, India, where it is then shipped to customers.

Electric operated mechanical screen plants are in use for grade wise production of iron ore in lumps and fines in adjoining Lamgao lease. Mechanical processing i.e. dry screening was proposed for grade-wise production.