| 0 YEARS - The stand starts as a single canopy even-age managed unit with all trees approximately the same size and little undergrowth due to the dense shade and management practices. | |
| O YEARS + It is thinned to 50% of its original stock, and much of the downed wood is left on the ground to provide nutrients for emerging vegetation. | |
| 10 YEARS 10 years after the thinning, the large trees have began filling in the gaps. Young Doug Firs have germinated in the open, sunny areas. The increased light levels and hands-off management since that time have allowed some vine maple, ferns and mahonia to appear. | |
| 20 YEARS 20 years after the managed thinning, the large Doug Firs have reached their peak of growth at about 80-100 feet high and 70 years old. The young trees are beginning to crowd each other out, and a few have died. Some of the bigger trees have been lost to natural causes and have formed some larger woody debris on the ground. | |
| 50 YEARS At the 50 year mark, the forest is again in dense shade. Canopy closure is around 90%, due to the growth of the big trees and the filling in of a second canopy. It will remain this way for quite some time, until the primary canopy ages enough to begin die out (100 to 300 years). |