The Columbia River is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, Canada. It flows northwest and then south into the US state of Washington, then turns west to form most of the border between Washington and the state of Oregon before emptying into the Pacific Ocean. The river is 1,243 miles (2,000 km) long, and its largest tributary is the Snake River. Its drainage basin is roughly the size of France and extends into seven US states and a Canadian province. The fourth-largest river in the United States by volume, the Columbia has the greatest flow of any river entering the Pacific and the 36th greatest of any river in the world.
Bald Head Island, historically Smith Island, is a village located on the east side of the Cape Fear River in Brunswick County, North Carolina, United States. Compared to the nearby city of Wilmington to the north, the village of Bald Head Island is small and somewhat remote. It is accessible by ferry from the nearby town of Southport and by four-wheel drive vehicle driving along the beach strand from Fort Fisher to the north. Only government officials are allowed to drive the beach strand route. There are few cars on the island; instead, residents drive modified electric golf carts. Bald Head Island is nationally recognized for its sea turtle nesting activity.
In oceanography, geomorphology, and earth sciences, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water to near the surface. Often it refers to those submerged ridges, banks, or bars that rise near enough to the surface of a body of water as to constitute a danger to navigation. Shoals are also known as sandbanks, sandbars, or gravelbars. Two or more shoals that are either separated by shared troughs or interconnected by past or present sedimentary and hydrographic processes are referred to as a shoal complex.
A spit or sandspit is a deposition bar or beach landform off coasts or lake shores. It develops in places where re-entrance occurs, such as at a cove's headlands, by the process of longshore drift by longshore currents. The drift occurs due to waves meeting the beach at an oblique angle, moving sediment down the beach in a zigzag pattern. This is complemented by longshore currents, which further transport sediment through the water alongside the beach. These currents are caused by the same waves that cause the drift.
Longshore drift from longshore current is a geological process that consists of the transportation of sediments along a coast parallel to the shoreline, which is dependent on oblique incoming wave direction. Oblique incoming wind squeezes water along the coast, and so generates a water current which moves parallel to the coast. Longshore drift is simply the sediment moved by the longshore current. This current and sediment movement occur within the surf zone.
The Sandy River is a 56-mile (90 km) tributary of the Columbia River in northwestern Oregon in the United States. The Sandy joins the Columbia about 14 miles (23 km) upstream of Portland.
The Coquille River is a stream, about 36 miles (58 km) long, in southwestern Oregon in the United States. It drains a mountainous area of 1,059 square miles (2,740 km2) of the Southern Oregon Coast Range into the Pacific Ocean. Its watershed is between that of the Coos River to the north and the Rogue River to the south.
The Columbia Bar, also frequently called the Columbia River Bar, is a system of bars and shoals at the mouth of the Columbia River spanning the U.S. states of Oregon and Washington. The bar is about 3 miles (5 km) wide and 6 miles (10 km) long.
Humboldt Bay is a natural bay and a multi-basin, bar-built coastal lagoon located on the rugged North Coast of California, entirely within Humboldt County, United States. It is the largest protected body of water on the West Coast between San Francisco Bay and Puget Sound, the second-largest enclosed bay in California, and the largest port between San Francisco and Coos Bay, Oregon. The largest city adjoining the bay is Eureka, the regional center and county seat of Humboldt County, followed by the town of Arcata. These primary cities, together with adjoining unincorporated communities and several small towns, comprise a Humboldt Bay Area total population of nearly 80,000 people. This comprises nearly 60% of the population of Humboldt County. The bay is home to more than 100 plant species, 300 invertebrate species, 100 fish species, and 200 bird species. In addition, the bay and its complex system of marshes and grasses support hundreds of thousands of migrating and local shore birds. Commercially, this second-largest estuary in California is the site of the largest oyster production operations on the West Coast, producing more than half of all oysters farmed in California.
The Graveyard of the Pacific is a somewhat loosely defined stretch of the Pacific Northwest coast stretching from around Tillamook Bay on the Oregon Coast northward past the treacherous Columbia Bar and Juan de Fuca Strait, up the rocky western coast of Vancouver Island to Cape Scott.
Peter Iredale was a four-masted steel barque sailing vessel that ran ashore October 25, 1906, on the Oregon coast en route to the Columbia River. She was abandoned on Clatsop Spit near Fort Stevens in Warrenton about four miles (6 km) south of the Columbia River channel. Wreckage is still visible, making it a popular tourist attraction as one of the most accessible shipwrecks of the Graveyard of the Pacific.
Johnson Creek is a 25-mile (40 km) tributary of the Willamette River in the Portland metropolitan area of the U.S. state of Oregon. Part of the drainage basin of the Columbia River, its catchment consists of 54 square miles (140 km2) of mostly urban land occupied by about 180,000 people as of 2012. Passing through the cities of Gresham, Portland, and Milwaukie, the creek flows generally west from the foothills of the Cascade Range through sediments deposited by glacial floods on a substrate of basalt. Though polluted, it is free-flowing along its main stem and provides habitat for salmon and other migrating fish.
Clatsop Spit is a giant sand spit on the Pacific coast along U.S. Route 101 between Astoria and the north end of Tillamook Head in Clatsop County, northwest Oregon at the mouth of the Columbia River. The Clatsop Spit was formed by Columbia River sediment brought to the coast by the river flow after the last ice age ended approximately 8500 years ago and the ocean level rose. Here it was worked over and shaped by the wind and the waves until a vast and sandy plain was formed. In regular conversation, referring to Clatsop Spit usually refers to the northern end of the spit: the area that is bound by the Pacific to the west and the Columbia River to the northeast. In the past, the spit was known as Clatsop Sands.
Point Adams Light was a lighthouse near the mouth of the Columbia River on the Oregon Coast of the United States. The lighthouse was designed by Paul J. Pelz, who also designed Point Adams's sister stations, Point Fermin Light in San Pedro, California, East Brother Island Light in Richmond, California, Mare Island Light, in Carquinez Strait, California, Point Hueneme Light in California, and Hereford Inlet Light in North Wildwood, New Jersey, all in essentially the same style. It operated from February 15, 1875 until 1899, when it became obsolete by the extension of the south jetty and the establishment of the Lightship Columbia in 1892. The lighthouse was considered a fire hazard and demolished in 1912.
The Columbia Slough is a narrow waterway, about 19 miles (31 km) long, in the floodplain of the Columbia River in the U.S. state of Oregon. From its source in the Portland suburb of Fairview, the Columbia Slough meanders west through Gresham and Portland to the Willamette River, about 1 mile (1.6 km) from the Willamette's confluence with the Columbia. It is a remnant of the historic wetlands between the mouths of the Sandy River to the east and the Willamette River to the west. Levees surround much of the main slough as well as many side sloughs, detached sloughs, and nearby lakes. Drainage district employees control water flows with pumps and floodgates. Tidal fluctuations cause reverse flow on the lower slough.
Desdemona Sands Light was a lighthouse located on the Pacific coast of the U.S. state of Oregon, at the mouth of the Columbia River to aid navigation of the Columbia Bar.
The Columbia River Estuary is situated on the Oregon–Washington border and the Pacific Coast of the United States. It was traditionally inhabited by the Chinook Native Americans and discovered by settlers in 1788. The Estuary plays host to a plethora of species of marine and terrestrial flora and fauna, and multiple conservation organisations exist that maintain the area. Geologically, it is situated on a continental margin of the North American Plate.
Germein Bay is a bay in the Australian state of South Australia located at the northern end Spencer Gulf on the gulf's east coast to the immediate north of the city of Port Pirie. Its extent includes the port known as ‘Port Pirie’ and the former port of Port Germein. Since 2012, the majority of the bay has been within the protected area known as the Upper Spencer Gulf Marine Park.
SS General Warren was an American steamship that operated on the Pacific Coast until she wrecked off the Oregon Coast in 1852.
The Siuslaw jetties at Florence, Oregon, in the United States, are parallel rubble-mound structures at the entrance of the Siuslaw River, bounding the north and south banks and protecting the navigation channel. The jetties extend into the Pacific Ocean, with spur jetties designed to reduce breakers and shoaling across the sand bar.
