BOISE, Idaho — Not very often does a 10-story-tall, 800,000-pound landmark change locations. Especially one that’s alive.

But workers in Idaho will attempt just that starting Friday. A massive sequoia sent to Boise as a small seedling by naturalist John Muir more than a century ago is now in the way of a hospital’s expansion and plans are to move it two blocks away to city property.

“We’ve all got our fingers crossed that the tree is going to make it to its new location,” said Mary Grandjean, the granddaughter of an Idaho forester who received the sequoia seedlings from Muir around 1912.

St. Luke’s Health System is doing more than hoping. It’s spending $300,000 to move the largest sequoia in the state, rather than chopping it down and risking a public relations backlash.

“We understand the importance of this tree to this community,” said Anita Kissée, spokeswoman for the hospital. Cutting it down “was never even an option.”

Even the tree company hired to do the move is feeling the pressure to keep the 98-foot tree upright as it travels about two blocks over about 12 hours to its new home.

“This is going to be one of what we call our champion trees,” said David Cox, who is overseeing the move for Texas-based Environmental Design.

Cox said the tree will be the tallest the company has ever moved, as well as the largest in circumference at more than 20 feet near its base. He puts the chances of the tree surviving at 95 percent.