Salmon River Estuary-Cascade Head – State Wildlife Action Plan

The Salmon River Estuary-Cascade Head COA (43 mi²) extends from just north of Neskowin south to Otis. This area provides a unique combination of habitat types, from the rocky shoreline inland and includes the Cascade Head Scenic Research Area. It also extends up into the mixed conifer forests of the Coast Range. This COA is adjacent to the Nestucca Bay and Devil’s Lake COAs.

Recommended Conservation Actions

Conduct thorough Pacific marten surveys at Cascade Head Scenic Research Area.
Improve bridge over Salmon River on Highway 101 for better tidal flow.
Limit commercial use of public facilities: boat ramps; parking; trails, etc.
Preserve balds and buttes from encroachment of non-native vegetation.
Protect molting elephant seals from human disturbance.
Promote coexistence with American beaver.
Maintain and enhance in-channel watershed functions, connection to riparian habitat, water flow and hydrology, particularly for coho salmon.

Local Conservation Actions and Plans

Potential Partners

Special Features

General

Elephant seals molt in the mouth of the Salmon River and Cascade Head.
Peregrine Falcon and Bald Eagle nest within this COA.
The has been a restoration of a salt marsh in the Salmon River estuary.
There is habitat for silverspot butterflies located on the grassy headlands of Cascade Head.

A portion of the Nestucca Bay National Wildlife Refuge within this COA includes the Neskowin Marsh, which protects a large freshwater coastal wetland that includes bogs and other rare plant communities.

Protected Areas

Cascade Head Scenic Research Area
Neskowin Beach State Recreation Site
Neskowin Natural Area
Nestucca Bay National Wildlife Refuge

Siuslaw National Forest
The Knoll Open Space

Previous COA Association

Previously Associated with (2006 COAs)
- CR-14 (Salmon River Estuary – Cascade Head)
Size Change from 2016 boundaries: -6.1 mi² (12% decrease)

Specialized Local Habitats

Aquatic vegetation beds
Balds and buttes
Bays
Forest openings
Off-channel habitat
Off-shore rocks
Rock habitat
Rocky shore and tidepools

Ecoregions

Coast Range

Oregon's Coast Range, known for its dramatic scenery, is extremely diverse, with habitats ranging from open sandy dunes to lush forests and from tidepools to headwater streams. It follows the coastline and extends east through coastal forest to the border of the Willamette Valley and Klamath Mountains ecoregions

Nearshore

The Nearshore ecoregion includes a variety of habitats ranging from submerged high-relief rocky reefs to broad expanses of intertidal mudflats in estuaries and hosts a vast array of fish, invertebrates, marine mammals, birds, plants, and micro-organisms. This ecoregion encompasses the area from the outer boundary of Oregon's Territorial Sea to the supra-tidal zone, and up into the estuaries.

Key Habitats

Coastal Dunes

Occurring along the Oregon coastline, coastal dunes provide habitat for species that prefer open, sandy habitats with a high degree of disturbance from winds and tides.

Estuaries

Estuaries are broadly defined as partially enclosed coastal bodies of tidally influenced water with one or more inputs of freshwater, and with a free or intermittent connection to the open sea. Estuaries typically occur at locations where freshwater from rivers, streams, or creeks meets saltwater from the nearshore ocean, creating a tidal basin that experiences frequent …

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 that were formed through geological processes, such as glacial scouring, tectonic movements, volcanic activity and river meander cutoffs. In Oregon, natural lakes are defined as standing water bodies larger than 20 acres, including some seasonal lakes. Depth is not a reference for characterization of …

Example of Oak Woodlands, which is a Strategy Habitat within the State Wildlife Action Plan

Oak Habitats

There are several oak habitat types in Oregon, where oaks comprise most of the canopy. These can include oak woodlands, oak forest, oak chaparral, and riparian oak. Oak savanna is covered in the Grasslands Key Habitat. Oaks may also co-dominate a canopy in oak/fir, oak pine, and oak hardwood habitats.

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.

Ducks on a wetland in Ladd Marsh Wildlife Area, Oregon

Wetlands

Wetlands are habitats that are inundated or saturated by surface water or ground water at a frequency and duration sufficient to support vegetation typically adapted for life in sodden soil conditions. While dominated by periods of inundation, the natural ecological cycle may also include dry intervals. Permanently wet habitats include backwater sloughs, oxbow lakes, peatlands, …

Nearshore Key Habitats

Nearshore Habitats encompass the coastal and marine habitats in the area from the 3 nautical mile outer limit of Oregon’s territorial sea, where water depths average 66 m (216 ft) and range from 17 m to 194 m (56 to 308 ft), to the supratidal areas of the shoreline affected by wave spray and overwash …