|Locale||Andhra Pradesh, Odisha, Chhattisgarh|
|Operator(s)||East Coast Railway zone|
|Track length||443 km (275 mi)|
|No. of tracks||1|
|Track gauge||1,676 mm (5 ft 6 in) Broad gauge|
|Electrification||25kV AC 50 Hz|
In 1960, Indian Railway took up three projects: the Kothavalasa – Araku – Koraput – Jeypore – Jagdalpur – Dantewara – Kirandaul line, the Jharsuguda – Sambalpur – Bargarh – Balangir – Titlagarh Project and the Biramitrapur – Rourkela – Bimlagarh – Kiriburu project. All the three projects taken together were popularly known as the DBK Project or the Dandakaranya – Bolangir – Kiriburu project. The Kothavalasa–Kirandaul line was opened in 1966–67 under South Eastern Railway Zone with financial aid of Japan for transporting Iron ore.
This line passes hill sections of Eastern ghats through Araku Valley. This is the highest broad gauge in the world which touches as high as 996.32 metres above sea level (MSL). The line has a total of 58 tunnels and 84 major bridges and each tunnel is as long as 520 metres.
Electrification of the line was completed in four phases. Kirandul–Jagdalpur section was completed in 1980. Jagdalpur–Koraput section was completed in 1981. Koraput–Araku–Waltair section was completed in 1982.The Kothavalasa–Kirandul route was completely electrified by 1982.
The Kothavalasa-Kirandul section is classified as a Group E-special class line in which speed should be below 100 km/h.
This line is mainly used for freight purposes which is a huge profit benefitting Waltair Division. Nearly 3000 crore (US$500 million) of profit comes through this line. Iron ore from Baladila were transported to Waltair through this line.