|
Fairview Creek
Fairview Creek is a tributary of the Columbia Slough in the U.S. state of Oregon. The creek forms in a wetland near Grant Butte in Gresham and flows north for to Fairview Lake in Fairview. Grant Butte, rising to above sea level, is one of eight dormant volcanic formations near Gresham. Fairview Creek begins northeast of the butte at an elevation of and falls to an elevation of at the lake. The creek is a former tributary of the Columbia River, which it reached by flowing north through wetlands in the Columbia's floodplain. In the early 20th century, an artificial channel diverted the water from these wetlands to the Columbia Slough, a tributary of the Willamette River. In 1960, water managers built a dam to create Fairview Lake for water storage and recreation. The lake covers about and is to deep. Fairview Creek has two named tributaries, No Name Creek, and Clear Creek. A smaller stream, Osburn Creek, also flows into Fairview Lake, which empties through a weir and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multnomah County, Oregon
Multnomah County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the county's population was 815,428. Multnomah County is part of the Portland– Vancouver– Hillsboro, OR–WA Metropolitan Statistical Area. Though smallest in area, Multnomah County is the state's most populous county. Its county seat, Portland, is the state's largest city. History The area of the lower Willamette River has been inhabited for thousands of years, including by the Multnomah band of Chinookan peoples long before European contact, as evidenced by the nearby Cathlapotle village, just downstream. Multnomah County (the thirteenth in Oregon Territory) was created on December 22, 1854, formed out of two other Oregon counties – the eastern part of Washington County and the northern part of Clackamas County. Its creation was a result of a petition earlier that year by businessmen in Portland complaining of the inconvenient location of the Washington County s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weir
A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of lakes, ponds, and reservoirs. There are many weir designs, but commonly water flows freely over the top of the weir crest before cascading down to a lower level. Etymology There is no single definition as to what constitutes a weir and one English dictionary simply defines a weir as a small dam, likely originating from Middle English ''were'', Old English ''wer'', derivative of root of ''werian,'' meaning "to defend, dam". Function Commonly, weirs are used to prevent flooding, measure water discharge, and help render rivers more navigable by boat. In some locations, the terms dam and weir are synonymous, but normally there is a clear distinction made between the structures. Usually, a dam is designed specifically to impound water beh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reservoirs In Oregon
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, through excavation, or building any number of retaining walls or levees. In other contexts, "reservoirs" may refer to storage spaces for various fluids; they may hold liquids or gasses, including hydrocarbons. ''Tank reservoirs'' store these in ground-level, elevated, or buried tanks. Tank reservoirs for water are also called cisterns. Most underground reservoirs are used to store liquids, principally either water or petroleum. Types Dammed valleys Dammed reservoirs are artificial lakes created and controlled by a dam constructed across a valley, and rely on the natural topography to provide most of the basin of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geography Of Portland, Oregon
Portland (, ) is a port city in the Pacific Northwest and the largest city in the U.S. state of Oregon. Situated at the confluence of the Willamette and Columbia rivers, Portland is the county seat of Multnomah County, the most populous county in Oregon. Portland had a population of 652,503, making it the 26th-most populated city in the United States, the sixth-most populous on the West Coast, and the second-most populous in the Pacific Northwest, after Seattle. Approximately 2.5 million people live in the Portland metropolitan statistical area (MSA), making it the 25th most populous in the United States. About half of Oregon's population resides within the Portland metropolitan area. Named after Portland, Maine, the Oregon settlement began to be populated in the 1840s, near the end of the Oregon Trail. Its water access provided convenient transportation of goods, and the timber industry was a major force in the city's early economy. At the turn of the 20th century, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tributaries Of The Willamette River
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean. The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of . The Madeira River is the largest tributary river by volume in the world with an average discharge of . A confluence, where two or more bodies of water meet, usually refers to the joining of tributaries. The opposite to a tributary is a distributary, a river or stream that branches off from and flows away from the main stream. PhysicalGeography.net, Michael Pidwirny & Scott ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Rivers Of Oregon
This is a partial listing of rivers in the state of Oregon, United States. This list of Oregon rivers is organized alphabetically and by tributary structure. The list may also include streams known as creeks, brooks, forks, branches and prongs, as well as sloughs and channels. A list of rivers of the Americas and a list of Pacific Ocean coast rivers of the Americas are also available, as is a list of Oregon lakes. __TOC__ Alphabetical listing * Abiqua Creek * Agency Creek (South Yamhill River) * Alsea River *Amazon Creek * Ana River *Applegate River * Ash Creek * Ashland Creek *Balch Creek * Bear Creek *Big Butte Creek * Big Marsh Creek * Big River * Birch Creek * Blue River * Breitenbush River *Bridge Creek (John Day River) * Buck Hollow River * Bull Run River * Bully Creek * Burnt River * Butte Creek *Calapooia River *Catherine Creek * Chetco River *Chewaucan River *Clackamas River *Clatskanie River * Clear Fork * Clearwater River * Coast Fork Willamette River * Collawash R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Lakes In Oregon
This is a list of the lakes and reservoirs of Oregon. Gallery File:AbertRim-right.jpg, Lake Abert and the Abert Rim File:Applegate Lake Oregon.jpg, Applegate Lake in Jackson County File:Lake Billy Chinook, Deschutes National Forest, Oregon (photo by Bob Nichol).jpg, Lake Billy Chinook File:Bull Run Lake.jpg, Bull Run Lake and Mount Hood File:Cleawox Lake.jpg, Cleawox Lake on the coast File:Cougar Reservoir 2011.jpg, Cougar Reservoir on the South Fork McKenzie River File:Crater lake oregon.jpg, Crater Lake File:Cullaby_Lake,_Oregon.jpg, Cullaby Lake in Clatsop County File:Cultus Lake.JPG, Cultus Lake in Deschutes County File:Diamond Lake & Mt Bailey.....JPG, Diamond Lake and Mount Bailey File:Elk Lake and South Sister, Oregon.jpg, Elk Lake and South Sister File:Fern Ridge Reservoir, Oregon.JPG, Fern Ridge Reservoir on the Long Tom River in Lane County File:Fish Lake Oregon.jpg, Fish Lake with Mount McLoughlin in the background File:Goose Lake 002.jpg, Goose Lake on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
40-Mile Loop
The 40-Mile Loop is a partially completed greenway trail around and through Portland in the U.S. state of Oregon. It was proposed in 1903 by the Olmsted Brothers architecture firm as part of the development of Forest Park. One greenway expert calls it "one of the most creative and resourceful greenway projects in the country." The name's "forty" was obsolete within a few decades after it was proposed. The proposed total path is now about long, and connects more than thirty city parks. Similarly, "loop" is not entirely accurate. There are several subloops, cutoffs and spur trails within the system. One spur is proposed to connect to the Pacific Crest Trail. History As part of beautification planning for the Lewis and Clark Centennial Exposition of 1905, Portland's recently established Parks Board invited the Olmsted Brothers in 1903. Besides suggestions for Washington Park, their research of existing city parks resulted in a bold proposal for a loop of interconnected ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnson Creek (Willamette River)
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 basin, catchment consists of of mostly urban land occupied by about 180,000 people as of 2012. Passing through the cities of Gresham, Oregon, Gresham, Portland, Oregon, Portland, and Milwaukie, Oregon, 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 Water pollution, polluted, it is free-flowing river, free-flowing along its main stem and provides habitat for salmon and other fish migration, migrating fish. Prior to Oregon Country, European settlement, the watershed was heavily forested and was used by Indigenous peoples of the Pacific Northwest Coast, Native Americans of the Chinookan, Chinook band for fishing and hunting. In the 19th century, non-Native Ameri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springwater Corridor
The Springwater Corridor Trail is a bicycle and pedestrian rail trail in the Portland metropolitan area in Oregon, United States. It follows a former railway line from Boring through Gresham to Portland, where it ends south of the Eastbank Esplanade. Most of the corridor, about long, consists of paved, off-street trail, though about overlaps city streets in Portland's Sellwood neighborhood. A large segment roughly follows the course of Johnson Creek and crosses it on bridges many times. Much of the corridor was acquired by the City of Portland in 1990; remaining segments were acquired by Metro thereafter. The trail is part of the Portland area's 40-Mile Loop trail system. It connects to many adjacent or nearby parks, including Tideman Johnson Natural Area, Powell Butte, and others. History The Springwater Division rail line was named for a planned connection to Springwater, Oregon. The Portland Traction Company operated rail service from Portland to Boring from 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culvert
A culvert is a structure that channels water past an obstacle or to a subterranean waterway. Typically embedded so as to be surrounded by soil, a culvert may be made from a pipe, reinforced concrete or other material. In the United Kingdom, the word can also be used for a longer artificially buried watercourse. Culverts are commonly used both as cross-drains to relieve drainage of ditches at the roadside, and to pass water under a road at natural drainage and stream crossings. When they are found beneath roads, they are frequently empty. A culvert may also be a bridge-like structure designed to allow vehicle or pedestrian traffic to cross over the waterway while allowing adequate passage for the water. Culverts come in many sizes and shapes including round, elliptical, flat-bottomed, open-bottomed, pear-shaped, and box-like constructions. The culvert type and shape selection is based on a number of factors including requirements for hydraulic performance, limitations on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Willamette River
The Willamette River ( ) is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is long, lying entirely in northwestern Oregon in the United States. Flowing northward between the Oregon Coast Range and the Cascade Range, the river and its tributaries form the Willamette Valley, a basin that contains two-thirds of Oregon's population, including the state capital, Salem, and the state's largest city, Portland, which surrounds the Willamette's mouth at the Columbia. Originally created by plate tectonics about 35 million years ago and subsequently altered by volcanism and erosion, the river's drainage basin was significantly modified by the Missoula Floods at the end of the most recent ice age. Humans began living in the watershed over 10,000 years ago. There were once many tribal villages along the lower river and in the area around its mouth on the Columbia. Indigenous peoples lived througho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
