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07/18/08 1:35 AM ET

Ballpark is 'Made in Minnesota'

Exterior will be made of limestone found in Gopher State

MINNEAPOLIS -- Minnesota's ballpark of the future will now begin to resemble an actual ballpark.

The ballpark's exterior walls -- limestone that is designed to emulate the exposed ledges of stone along the banks of the Mississippi River -- is now being installed.

The stone will traverse the $412 million ballpark and will be mixed to display random patterns of different colors and shapes. The installation will be completed in the early summer of 2009.

The stone is from a quarry at the Vetter Stone Company in Mankato. Limestone from the company has been used to construct the Wells Fargo Tower is Minneapolis, the Smithsonian National Museum of the American Indian in Washington, D.C., and the U.S. embassies in Moscow and Abu Dhabi.

A total of more than 100,000 square feet, or 100 semi-truck loads, of limestone will be used for the Twins ballpark.

"We said that we wanted to have a Minnesota ballpark, and nothing could be more grassroots, if you will, than what is going to be the skin of this ballpark," said Jerry Bell, president of Twins Sports Inc. "This is truly going to be a Minnesota ballpark."

Ground was initially broken on the ballpark in April. It is scheduled to open in 2010.

Thor Nystrom is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.