Dockworkers at the Port of Charleston and elsewhere have ratified a new six-year labor contract, ending more than a year of negotiations.

The International Longshoremen’s Association, AFL-CIO, posted news of the ratification on its website late Tuesday. It said vote totals from its 14,500 longshoremen were still being tallied but that the contract was “overwhelmingly approved.”

Charleston-based ILA Local 1422 represents about 1,600 port workers in South Carolina.

The contract between the longshoremen along the East and Gulf coasts and the U.S. Maritime Alliance originally expired Sept. 30. Federal mediators negotiated extensions to avert possible strikes that could have crippled operations at major ports along the East Coast, including Charleston’s.

The union said the contract includes wage increases totaling $3 an hour spread out over the life of the agreement. By the final year of the new contract the hourly pay rate will be $35 an hour.

The progressive pay scale for lower tiered workers also will be shortened to six years from nine years. A new union member earning a base pay of $20 an hour at the start of the new contract will earn $35 an hour by the end of the six years.

Among the job protections won was contract language that “strongly protects” union workers who have been displaced due to new technology and automation, and terms that restrict outsourcing or subcontracting of Longshoremen’s Association jobs to non-union employers.

No charges will be made to the health care plan.

“We all worked very hard, achieved landmark improvements and protected our members and our union for many years,” said ILA President Harold J. Daggett.

Members of the Maritime Alliance, an alliance of container carriers, direct employers, and port associations serving the East and Gulf Coasts, will vote to ratify the contract on April 17.

The retail industry, which is a major source of imported goods, applauded the deal

“The nation’s ports are our economic lifeline to the world, said Jonathan Gold, vice president for supply chain and customs policy with the National Retail Federation. He added that the “vote will bring much-needed certainty and efficiency to East and Gulf Coast port operations and secure the United States’ position in the global supply chain.”