Today, The Nature Conservancy and partners will detonate approximately two miles of levees to restore wetlands at the Conservancy's 7,400 acre Williamson River Delta Preserve in southern Oregon. This will require 100 tons of explosives at four locations along the levee, causing Upper Klamath Lake to flood 2,500 acres within one hour. The use of explosives to restore wetlands follows months of intense study, engineering, and construction.