This area is comprised of the 1,500-acre Sandy River Delta at the confluence of the Sandy and Columbia Rivers, plus the Lower Sandy River and its tributaries, including Beaver Creek and the lower reaches of the Bull Run River. Located east of the Portland Metro area in the Columbia River Gorge National Scenic Area.
COA ID: 057
The West Cascades ecoregion extends from east of the Cascade Mountains summit to the foothills of the Willamette, Umpqua, and Rogue Valleys, and spans the entire length of the state of Oregon. It is largely dominated by conifer forests, moving into alpine parklands and dwarf shrubs at higher elevations.
The Willamette Valley ecoregion is bounded on the west by the Coast Range and on the east by the Cascade Range. This long mostly level alluvial plain has some scattered areas of low basalt, and contrasts with productive farmland and large urban areas. It has the fastest-growing human population in the state resulting in challenges due to land-use changes.
Grasslands include a variety of upland grass-dominated habitats, such as upland prairies, coastal bluffs, and montane grasslands.
Late Successional Mixed Conifer Forests
Late successional mixed conifer forests provide a multi-layered tree canopy, including large-diameter trees, shade-tolerant tree species in the understory, and a high volume of dead wood, such as snags and logs.
Natural lakes are relatively large bodies of freshwater surrounded by land. For the purposes of the Conservation Strategy, natural lakes are defined as standing water bodies larger than 20 acres, including some seasonal lakes.
Oak woodlands are characterized by an open canopy dominated by Oregon white oak.
Flowing Water and Riparian Habitats
Flowing Water and Riparian Habitats include all naturally occurring flowing freshwater streams and rivers throughout Oregon as well as the adjacent riparian habitat.
Wetlands are covered with water during all or part of the year. Permanently wet habitats include backwater sloughs, oxbow lakes, and marshes, while seasonally wet habitats include seasonal ponds, vernal pools, and wet prairies.
American Pika (Observed)
California Floater Freshwater Mussel (Observed)
California Myotis (Modeled Habitat)
Cascade Torrent Salamander (Observed)
Cascades Frog (Modeled Habitat)
Chinook Salmon (Documented)
Chipping Sparrow (Observed)
Chum Salmon (Documented)
Clouded Salamander (Modeled Habitat)
Coastal Cutthroat Trout (Documented)
Oncorhynchus clarki clarki
Coastal Tailed Frog (Modeled Habitat)
Coho Salmon (Documented)
Common Nighthawk (Observed)
Cope’s Giant Salamander (Modeled Habitat)
Fringed Myotis (Modeled Habitat)
Grasshopper Sparrow (Observed)
Ammodramus savannarum perpallidus
Great Gray Owl (Modeled Habitat)
Harlequin Duck (Observed)
Hoary Bat (Modeled Habitat)
Larch Mountain Salamander (Modeled Habitat)
Long-legged Myotis (Modeled Habitat)
Northern Goshawk (Modeled Habitat)
Accipiter gentilis atricapillus
Northern Red-legged Frog (Observed)
Northern Spotted Owl (Modeled Habitat)
Strix occidentalis caurina
Olive-sided Flycatcher (Observed)
Oregon Slender Salamander (Observed)
Oregon Vesper Sparrow (Observed)
Pooecetes gramineus affinis
Purple Martin (Observed)
Progne subis arboricola
Red Tree Vole (Modeled Habitat)
Short-eared Owl (Modeled Habitat)
Asio flammeus flammeus
Silver-haired Bat (Modeled Habitat)
Steelhead / Rainbow / Redband Trout (Documented)
Oncorhynchus mykiss ssp
Townsend’s Big-eared Bat (Modeled Habitat)
Western Bluebird (Observed)
Western Gray Squirrel (Observed)
Western Meadowlark (Observed)
Western Painted Turtle (Observed)
Chrysemys picta bellii
Western Pond Turtle (Observed)
Western Toad (Modeled Habitat)
White Rock Larkspur (Observed)
White-breasted Nuthatch (Observed)
Sitta carolinensis aculeata
Willow Flycatcher (Observed)
Winged Floater Freshwater Mussel (Observed)
Yellow-breasted Chat (Observed)
Icteria virens auricollis