Clark County is the southernmost county in the U.S. state of Washington. As of the 2010 census, the population was 425,363, making it Washington's fifth-most populous county. Its county seat and largest city is Vancouver. It was the first county in Washington, named after William Clark of the Lewis and Clark Expedition. It was created by the provisional government of Oregon Territory on August 20, 1845, and at that time covered the entire present-day state.
Ridgefield is a city in northern Clark County, Washington, in the United States. The population was 4,763 at the 2010 census. Located within the Portland metropolitan area, Ridgefield is notable for the significant Native American history and connection to the Lewis and Clark Expedition. It is also the headquarters of the Ridgefield National Wildlife Refuge, a primary reserve for migrating waterfowl on the Pacific Flyway, and the home of the Ridgefield High School "Spudders".
The Tualatin River is a tributary of the Willamette River in Oregon in the United States. The river is about 83 miles (134 km) long, and it drains a fertile farming region called the Tualatin Valley southwest and west of Portland at the northwest corner of the Willamette Valley. There are approximately 500,000 people residing on 15 percent of the land in the river's watershed.
Sauvie Island, in the U.S. state of Oregon, originally Wapato Island or Wappatoo Island, is the largest island along the Columbia River, at 26,000 acres (10,522 ha), and one of the largest river islands in the United States. It lies approximately ten miles northwest of downtown Portland, between the Columbia River to the east, the Multnomah Channel to the west, and the Willamette River to the south. A large portion of the island is designated as the Sauvie Island Wildlife Area. Sturgeon Lake, in the north central part of the island, is the most prominent water feature. The land area is 32.75 square miles (84.8 km2), or 20,959 acres (8,482 ha). Most of the island is in Multnomah County, but the northern third is in Columbia County. The Sauvie Island Bridge provides access across the Multnomah Channel from U.S. Route 30 and was completed in June 2008, replacing the first bridge to connect the island to the mainland which was opened on 30 December 1950.
The Youngs River is a tributary of the Columbia River, approximately 27 miles (43 km) long, in northwest Oregon in the United States. It drains part of the Northern Oregon Coast Range in the extreme northwest corner of state, entering the Columbia via Youngs Bay just approximately 10 miles (16 km) from its mouth.
The Lewis River is a tributary of the Columbia River, about 95 miles (153 km) long, in southwestern Washington in the United States. It drains part of the Cascade Range north of the Columbia River. The drainage basin of the Lewis River covers about 1,046 square miles (2,709 km2). The river's mean annual discharge is about 6,125 cubic feet per second (173.4 m3/s). Unlike nearby Lewis County and Fort Lewis the Lewis River was not named for Meriwether Lewis, but rather for A. Lee Lewis, an early colonizer who homesteaded near the mouth of the river.
Ridgefield National Wildlife Refuge is a wildlife preserve, one of the national wildlife refuges operated by the United States Fish and Wildlife Service, located in the westernmost part of Clark County, Washington. The refuge protects more than 5,200 acres (2,100 ha) of marshes, grasslands, and woodlands. The refuge was established in 1965, in response to a need to establish vital winter habitat for wintering waterfowl with an emphasis on the dusky Canada goose whose nesting areas in Alaska were severely impacted by the violent earthquake of 1964. Ridgefield NWR is part of the Ridgefield National Wildlife Refuge Complex, headquartered in Ridgefield, Washington, which oversees the management of four refuges in the southwestern part of the state: Ridgefield, and three refuges in the Columbia River Gorge: Franz Lake, Pierce, and Steigerwald Lake. This place was closed in spring of 2019 to cut down Douglas fir and change the trail. In fall of 2020, the construction of a new multi-purpose building began. The new multi-purpose building will be a construction type V-B and consist of a 4,415 square foot single story building with an associated balcony and basement area. The building is being constructed to provide the fish and wildlife staff office space, meeting space, and an area for public visitors including volunteers and conservation partners.
The Multnomah Channel is a 21.5-mile (34.6 km) distributary of the Willamette River. It diverges from the main stem a few miles upstream of the main stem's confluence with the Columbia River in Multnomah County in the U.S. state of Oregon. The channel flows northwest then north around Sauvie Island to meet the Columbia River near the city of St. Helens, in Columbia County.
The Boyer River is a tributary of the Missouri River, 118 miles (190 km) long, in western Iowa in the United States. Most reaches of the river's course have been straightened and channelized.
Lake River is a tributary, about 11 miles (18 km) long, of the Columbia River in the U.S. state of Washington. It flows north from Vancouver Lake in Vancouver to meet the larger river near Ridgefield and the northern tip of Bachelor Island. The Wilkes Expedition of 1841 referred to Lake River as Calipaya Inlet.
State Route 501 is a 13.97-mile-long (22.48 km) state highway in the southern part of the U.S. state of Washington. It is split into two sections in Clark County, a north–south alignment connecting Interstate 5 (I-5) in Vancouver to the Port of Vancouver and the Ridgefield National Wildlife Refuge, and a west–east alignment connecting Ridgefield to I-5. Prior to the 1964 highway renumbering, SR 501 was designated as Secondary State Highway 1T (SSH 1T), established in 1937 and re-aligned to serve the Port of Vancouver in 1963.
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.
Kelley Point Park is a city park in north Portland in the U.S. state of Oregon. Bounded by the Columbia Slough on the south, the Willamette River on the west, and the Columbia River on the north, the park forms the tip of the peninsula at the confluence of the rivers. Marine Terminal 6 of the Port of Portland lies immediately east of the park along the Columbia, while Terminal 5 is along the Willamette slightly south of the Columbia Slough. The park is at 45.6498384°N 122.7637106°W and rises to an elevation of 39 feet (12 m) above sea level. Sauvie Island is west of the park across the Willamette River. Hayden Island is slightly upstream of the park on the Columbia River opposite Marine Terminal 6.
Blue Lake Regional Park is a public park in Fairview, in the U.S. state of Oregon. The 101-acre (41 ha) park, near the south shore of the Columbia River in Multnomah County, includes many covered and uncovered picnic areas, playing fields for sports such as softball, a cross country course and infrastructure related to lake recreation including swimming, boating, and fishing. Encompassing wooded areas, three ponds, and a wetland in addition to the lake, the park is frequented by migrating birds and other wildlife. Paved paths run through the park, which is near the 40-Mile Loop hiking and biking trail. Park vegetation includes cottonwoods, willows, and other trees and shrubs as well as wetland plants such as cattails.
The Elochoman River is a tributary of the Columbia River, in the U.S. state of Washington. It is about 15 miles (24 km) long.
Lewis and Clark National Wildlife Refuge, near the mouth of the Columbia River, provides wintering and resting areas for an estimated 1,000 tundra swans, 5,000 geese, and 30,000 ducks. Other species include shorebirds and bald eagles.
Gee Creek is a 4th order tributary to the Columbia River, a.k.a. small creek, within Clark County, Washington named for William Gee, an early pioneer upon whose land the stream arose from. The Upper Gee Creek watershed, with an 8.7-square-mile (23 km2) drainage basin, is completely located within the Ridgefield quadrangle. The mainstem extends approximately 11.5 miles (18.5 km), of which 4.9 miles (7.9 km) are located within the Upper Gee Creek basin. Originating in the hills along Interstate 5, through Ridgefield, Washington and empties into a series of lakes on the Columbia River Floodplain. Abrams Park in Ridgefield is a local access point for Gee Creek and since 2003, has had a stream flow gauge installed to collect hydrological data. The lowest segment of Gee Creek meanders for 3 miles (4.8 km) through the Ridgefield National Wildlife Refuge.
Tenasillahe Island is an island in the Columbia River Estuary portion of the Columbia River in Clatsop County, Oregon. It is separated from the mainland and the unincorporated community of Clifton, Oregon by the Clifton Channel, and from nearby Welch Island by the Red Slough.
Stockton Deepwater Shipping Channel also called the Baldwin-Stockton Deepwater Shipping Channel or Stockton Deep Water Channel is a manmade deepwater water channel that runs from Suisun Bay and the Sacramento River - Sacramento Deep Water Ship Channel to the Port of Stockton and the Stockton Channel in California. The Stockton Ship Channel is 41 mi (66 km) long and about 37 ft (11 m) deep, allowing up to Panama Canal size ocean ships access to the Port of Stockton at the City of Stockton. The Stockton Deepwater Shipping Channel is part of the vast Sacramento–San Joaquin River Delta that has a connection to the Pacific Ocean. Stockton Deepwater Shipping Channel is also called the lower San Joaquin River.
Bird Island is an island in San Francisco Bay. It is in San Mateo County, California. Its coordinates are 37°33′04″N122°14′13″W, and the United States Geological Survey gave its elevation as 7 ft (2.1 m) in 1998. It appears on a 2012 USGS map of the area.
