- The Stephens Creek subwatershed covers 754 acres of southwest Portland.
- 144 acres of the subwatershed are forested.
- 61 acres of the subwatershed have woodland type tree canopy.
- The watershed has about 19,500 feet of natural stream channel (3.7 miles).
- A 3.5 acre Pacific willow forested wetland at the mouth of Stephens Creek is the most extensive remaining floodplain on the creek.
- Willamette River ESA listed fish species continue to use lower Stephens Creek as off-channel habitat. Fish species include Chinook, coho and steelhead
- The forested areas and streams of the subwatershed provide an important link between the West Hills and the Ross Island-Oaks Bottom ecosystem complex to the east, and between Marquam Nature Park to the north and Tryon Creek State Natural Area to the south.
- Stormwater from roads, parking lots and roofs generally flows directly into Stephens Creek, which then flows to the Willamette River.
- Impervious area, mostly streets, covers less than half of this subwatershed. The heaviest concentration of impervious area is in the I-5, Barbur Corridor in the Burlingame area.
- Parks and open space make up 168 acres of the watershed; 66 acres of land are in public ownership.
1120 SW 5th Avenue, Suite 1000, Portland, OR 97204