Probably the biggest single factor aiding the re-establishment of forest in areas around Mount St. Helens has been reforestation that has been conducted on timberlands around the volcano. The Forest Service salvaged 200 million board feet of blown down and standing dead timber from 10,000 acres. To date nearly ten million trees have been planted to reforest more than 14,000 acres of National Forest land. The survival of planted trees exceeded 70 percent because forest managers used the best planting techniques and planting stock available. Many plantations have already been commercially thinned.