Jeffersonville, Ind. based American Commercial Barge Line (ACBL) announced it has signed a contract with Bayou La Batre, Ala. shipbuilder Steiner Construction Company for the design and construction of a new EPA Tier 4 retractable towboat.“Investing in our future is a key part of ACBL’s strategy. We are proud to introduce the first Tier 4 Mitsubishi engines to the marine industry,” said Mike Ellis, CEO, ACBL. “The addition of this new Tier 4 retractable towboat represents our…