 Western Redcedar ("Thuja plicata"), Black Cottonwood ("Populus trichocarpa"), Douglas-fir ("Pseudotsuga menziesii"), Big Leaf Maple ("Acer macrophyllum"), and Red Alder ("Alnus rubra") were the dominating tree species.These dominant species were first logged before 1895 and were shipped to sawmills around Lake Washington, using North Creek as a means of transport.The North Creek watershed is an area of approximately 30 square miles that discharges into the Sammamish River, and eventually Lake Washington.