Some of the highest quality trees on the woodland- straight and tall with little twist-are growing in this stand for the highvalue pole market. Here, trees are "thinned from above" as the larger trees are occasionally harvested from this stand, leaving smaller understory trees to respond and grow into dominance in this 3-acre demonstration.
Where: West of jct. Grouse Hollow & Carlson roads
Our Riparian Management Area highlights ways to protect water quality in managed streamside-forest environments. Examples of drainage structures, erosion control, and a fish-friendly stream crossing are featured. Additional information about protecting and managing resources in riparian settings is provided in a brochure keyed to numbered stops along two sections of the Watershed Interpretive Trail-Middle and East loops.
Where: East and Middle loops of the Watershed Trail and Up Creek Road
Thinning & Pruning
A dense stand of Douglas-fir grew to the point where the trees became crowded and little else grew in their shade. Thinning reduced the number of trees per acre so that remaining trees grow more vigorously. Pruning removed dead and under productive limbs: growth added to these trees will be free from knots, increasing their value for certain wood products. There are four different treatments in this demonstration, including a control where no thinning or pruning occurred-compare the results.
Where: Along Grouse Hollow Road from Creek Road to Low Gear Road
Following a clearcut harvest of 17-acres in 1990, three different techniques were used to prepare the site for reforestation: mechanical scarification, herbicide application, and slash burning. Then a variety of nursery-grown seedling stock-types and tree species were planted on the open slope. Moist areas now host western redcedar and western hemlock, while Douglas-fir dominates drier areas of the hillside. Part of the demonstration area is plagued by a root disease, and was planted with pine species and western redcedar, which are less susceptible to the disease than Douglas-fir.
Where: Between Low Gear Road & Grouse Hollow roads
In contrast to and directly across Grouse Hollow Road from the Reforestation Demonstration, this stand of 60-70 year old Douglas-fir is in the process of conversion to a stand of multiple-aged and mixed-species trees. A skid road system was first established in the stand to confine the impacts of harvesting. Next, brush and hardwood patches were cleared, and select overstory trees were removed to allow more light to reach the understory.
A mix of conifer seedlings are planted following thinning: western hemlock, grand fir, western redcedar and Douglas-fir now grow in the understory and small openings within the stand. The Uneven-aged Demonstration is very dynamic, requiring multiple entries to manage overstory density, while taking care to minimize damage to the understory trees as they grow to take the place of current dominant trees. This process of stand conversion will take more than 40 years to complete.
Where: West end of Grouse Hollow Road and Uneven Trail.