Indiana-based Steel Dynamics plans to invest $230 million to upgrade its northeast Mississippi steel mill, creating 45 jobs.
The company, headquartered in Fort Wayne, said it plans to spend $140 million to add more galvanizing capacity to coat steel with rust-preventing zinc. Steel Dynamics said it has unmet demand for galvanized steel.
Steel Dynamics said it will also invest $90 million to $100 million to increase production of high-grade steel for automakers and others.
Mississippi will give Steel Dynamics $2.7 million to pay for railroad infrastructure and concrete paving. Lowndes County will repay a separate $1.4 loan from the state for rail work, plus $150,000 for sewer improvements.
Steel Dynamics will also benefit from an existing agreement that cuts property taxes on all new investments by two-thirds for 10 years.
Shares in Steel Dynamics were up nearly 1 percent Tuesday, to $46.96 each.
Steel Dynamics is the state's fourth largest public company, with $9.5 billion in revenue in 2017, trailing only Anthem Inc., Eli Lilly and Co. and Cummins Inc.