1. Maraphari gaon se shuruat: Pehle yahan chhota Nagpur ke gahre jungle ke beech maraphari naam ka ek chhota sa gaon hua karta tha. Uske aas pass chas gaon ka samuh tha aur sabse najdeek ka shehar Purulia tha. Yaha Kashipur ke maharaja ka raj tha. 1600s me mugal raja man singh ne yahan jeet hasil ki thi , jiske naam per is kshetra ka naam manbhoom pada. 2. Nehru ka sapna: Azadi ke baad desh ko apne steel ki jarurat thi. Nehru ne yahan desh ka pehla swadeshi steel plant banane ka sapna dekha. Is jagah ko isliye chuna gaya kyunki yahan koyala,loha, manganee, jaise kachha maal bahut najdeek me milte the. 3. BSL ki sthapana: 29 jan 1964 ko Bokaro steel limited com ke roop me shuru kiya gaya, iske baad SAIL me mila diya gaya . Is plant ko soviet union (Russia) ki madad se banaya gaya tha