Immedion LLC formally announced Tuesday that it will build a $6 million data center in North Charleston’s Palmetto Commerce Park and hire 20 people to run it, The Post and Courier reported.

The Greenville-based data center and managed services company said the center will open in late spring 2012. It will be Immedion’s third, after sites in Greenville and Columbia, and will be built to withstand high winds and other conditions common on the coast, according to an announcement posted by the City of North Charleston.

Immedion first disclosed the project in August. Founded in 2006, it opened its first data center in Greenville in October 2007 and a 15,000-square-foot center in Columbia last October, The Post and Courier reported then. The North Charleston center will be the same size and offer the same services.

Applegate & Co. of North Charleston will build it on a nearly 2.9-acre lot along Palmetto Commerce Parkway, next to Charleston County’s 911 dispatch center, and Immedion will lease the building, the newspaper reported. Roper St. Francis Healthcare also plans a data center in the park. Chief Executive Frank Mobley said in August that the site sits outside any identified flood zone.

“Our customer base is any size business with critical information technology assets located nearby,” Mobley said in the announcement. “This facility will provide an ideal location for companies who want to keep these assets close by, but are in a high risk area, or have outgrown their internal capacity.”

“Information technology is a rapidly growing sector of our economy and is a key target industry in the Opportunity Next economic development strategy,” said R.M. Singletary, board chairman of the Charleston Regional Development Alliance.

Charleston County Council Chairman Teddie E. Pryor Sr. welcomed the company to the county, and North Charleston Mayor Keith Summey pointed to the park’s utilities.

“With its dual power infrastructure and fiber optics, Palmetto Commerce Park is quickly becoming known as a hub for innovative companies and data centers,” Summey said.