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
Ecoregions
West Cascades
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.
Willamette Valley
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.
Strategy Habitats
Grasslands
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
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
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
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.
Strategy Species
American Pika (Observed)
Ochotona princeps
California Floater Freshwater Mussel (Observed)
Anodonta californiensis
California Myotis (Modeled Habitat)
Myotis californicus
Cascade Torrent Salamander (Observed)
Rhyacotriton cascadae
Cascades Frog (Modeled Habitat)
Rana cascadae
Chinook Salmon (Documented)
Oncorhynchus tshawytscha
Chipping Sparrow (Observed)
Spizella passerina
Chum Salmon (Documented)
Oncorhynchus keta
Clouded Salamander (Modeled Habitat)
Aneides ferreus
Coastal Cutthroat Trout (Documented)
Oncorhynchus clarki clarki
Coastal Tailed Frog (Modeled Habitat)
Ascaphus truei
Coho Salmon (Documented)
Oncorhynchus kisutch
Common Nighthawk (Observed)
Chordeiles minor
Cope’s Giant Salamander (Modeled Habitat)
Dicamptodon copei
Fringed Myotis (Modeled Habitat)
Myotis thysanodes
Grasshopper Sparrow (Observed)
Ammodramus savannarum perpallidus
Great Gray Owl (Modeled Habitat)
Strix nebulosa
Harlequin Duck (Observed)
Histrionicus histrionicus
Hoary Bat (Modeled Habitat)
Lasiurus cinereus
Larch Mountain Salamander (Modeled Habitat)
Plethodon larselli
Long-legged Myotis (Modeled Habitat)
Myotis volans
Northern Goshawk (Modeled Habitat)
Accipiter gentilis atricapillus
Northern Red-legged Frog (Observed)
Rana aurora
Northern Spotted Owl (Modeled Habitat)
Strix occidentalis caurina
Olive-sided Flycatcher (Observed)
Contopus cooperi
Oregon Slender Salamander (Observed)
Batrachoseps wrighti
Oregon Vesper Sparrow (Observed)
Pooecetes gramineus affinis
Purple Martin (Observed)
Progne subis arboricola
Red Tree Vole (Modeled Habitat)
Arborimus longicaudus
Short-eared Owl (Modeled Habitat)
Asio flammeus flammeus
Silver-haired Bat (Modeled Habitat)
Lasionycteris noctivagans
Steelhead / Rainbow / Redband Trout (Documented)
Oncorhynchus mykiss ssp
Townsend’s Big-eared Bat (Modeled Habitat)
Corynorhinus townsendii
Western Bluebird (Observed)
Sialia mexicana
Western Gray Squirrel (Observed)
Sciurus griseus
Western Meadowlark (Observed)
Sturnella neglecta
Western Painted Turtle (Observed)
Chrysemys picta bellii
Northwestern Pond Turtle (Observed)
Actinemys marmorata
Western Toad (Modeled Habitat)
Anaxyrus boreas
White Rock Larkspur (Observed)
Delphinium leucophaeum
White-breasted Nuthatch (Observed)
Sitta carolinensis aculeata
Willow Flycatcher (Observed)
Empidonax traillii
Winged Floater Freshwater Mussel (Observed)
Anodonta nuttalliana
Yellow-breasted Chat (Observed)
Icteria virens auricollis