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North Umpqua River
The North Umpqua River is a tributary of the Umpqua River, about long, in southwestern Oregon in the United States. It drains a scenic and rugged area of the Cascade Range southeast of Eugene, flowing through steep canyons and surrounded by large Douglas-fir forests. Renowned for its emerald green waters, it is considered one of the best fly fishing streams in the Pacific Northwest for anadromous fish. Description It rises in the high Cascades, issuing from Maidu Lake at elevation of in the Mount Thielsen Wilderness, along the Douglas-Klamath county line approximately east of Roseburg. It follows a serpentine course down from the Cascades, westward along the southern side of the Calapooya Mountains. Its upper course passes through the Umpqua National Forest, past Toketee Falls and Steamboat, where it receives Steamboat Creek from the north. It receives the Little River from the south at Glide (the confluence is known as the Colliding Rivers) and joins the South Umpqua fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lemolo Lake
Lemolo Lake (ləmolo--Chinook Jargon for "wild" or "untamed") is a small lake and reservoir in Douglas County, Oregon in the Umpqua National Forest north of Crater Lake National Park, on the North Umpqua River. It is part of the Diamond Lake Ranger district and is administered by the United States Forest Service. History Before the 1880s, the area around Lemolo Lake was used mainly by the Native American groups. It was not until the 1880s that white settlers began to use the area extensively as grazing land for sheep. The first land-use reform came in 1908 when the McGowan, Kelsay Valley, and Dog Prairie Allotments allowed for regulated grazing in the areas around Lemolo and Diamond Lakes. While development continued in the vicinity of Diamond Lake throughout the 20th century, the land around Lemolo Lake remained relatively untouched with the exception of the building of the North Umpqua road in 1939 (later replaced by Hwy. 138 in 1964), the installation of telephone lines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umpqua National Forest
Umpqua National Forest, in southern Oregon's Cascade Range, covers an area of in Douglas County, Oregon, Douglas, Lane County, Oregon, Lane, and Jackson County, Oregon, Jackson counties, and borders Crater Lake National Park. The four ranger districts for the forest are the Cottage Grove, Diamond Lake, North Umpqua, and Tiller ranger districts. The forest is managed by the United States Forest Service, headquartered in Roseburg, Oregon, Roseburg. Geography Stands of Tsuga heterophylla, western hemlock, Fir, true fir, Douglas-fir and cedar transition to lower-elevation forests of mixed conifers and hardwoods. Timbered valleys of old-growth Pinus ponderosa, ponderosa and groves of oak separate mountains like the Mount Thielsen and the Mount Bailey (Oregon), Mount Bailey. Notable geologic features include volcanic basalt and andesite monolithic spires with descriptive names like Eagle Rock, Rattlesnake Rock, and Old Man. History Ancestors of the Umpqua, Oregon, Umpqua, Sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pumice
Pumice (), called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough-textured volcanic glass, which may or may not contain crystals. It is typically light-colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls, and being dark colored and denser.Jackson, J.A., J. Mehl, and K. Neuendorf (2005) ''Glossary of Geology'' American Geological Institute, Alexandria, Virginia. 800 pp. McPhie, J., M. Doyle, and R. Allen (1993) ''Volcanic Textures A guide to the interpretation of textures in volcanic rocks'' Centre for Ore Deposit and Exploration Studies, University of Tasmania, Hobart, Tasmania..198 pp. Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano. The unusual foamy configuration of pumice happens because of simultaneous rapid cooling and rapid depressurization. The depressurization creates bubbles by lowering the solubi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reservoir (water)
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 re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soda Springs Dam
Soda or SODA may refer to: Chemistry * Some chemical compounds containing sodium ** Sodium carbonate, washing soda or soda ash ** Sodium bicarbonate, baking soda ** Sodium hydroxide, caustic soda ** Sodium oxide, an alkali metal oxide * Soda glass, a common glass made with sodium carbonate or sodium oxide * Soda lake, an alternate generic name for a salt lake, with high concentration of sodium carbonates * Soda lime, a mixture of sodium, calcium, and potassium hydroxides * Soda pulping, a process for paper production using sodium compounds Computing * SODA (operating system) * Service-oriented development of applications * Service-oriented device architecture, to enable devices to be connected to a service-oriented architecture * Service-oriented distributed applications * Simple Object Database Access, an API for database queries * Soda PDF, a family of applications used on .pdf files * Symposium on Discrete Algorithms, an annual academic conference in computer science En ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectricity
Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other Renewable energy, renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of Low-carbon power, low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Umpqua River
The South Umpqua River is a tributary of the Umpqua River, approximately long, in southwestern Oregon in the United States. It drains part of the Cascade Range east of Roseburg. The river passes through a remote canyon in its upper reaches then emerges in the populated South Umpqua Valley east of Canyonville. Course It rises in the high Cascades north of Fish Mountain, formed by the confluence of two short forks in eastern Douglas County approximately northwest of Crater Lake. It flows generally southwest through a remote canyon in the Umpqua National Forest to Tiller, then west past Milo and Days Creek. It emerges into the South Umpqua Valley at Canyonville, passing under Interstate 5 and flowing north along the highway past Tri-City, Myrtle Creek, and Roseburg. It joins the North Umpqua from the south to form the Umpqua approximately northwest of Roseburg. It receives Cow Creek from the south approximately southwest of Tri-City. One of the main tributaries of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colliding Rivers
The Colliding Rivers is the name of the confluence of Little River into the North Umpqua River at Glide, Oregon, approximately 12 miles (19 km) east-northeast of Roseburg. It is known as Colliding Rivers because of the nearly head-on angle at which the streams meet, the only place in the state of Oregon where a river meets its tributary in such a straight angle. Prior to the point of the Colliding Rivers, the Little River approaches from the south and the North Umpqua has completed a sharp bend and intersects the Little River. Location The Colliding Rivers is on the west side of the town of Glide, which is accessed off Oregon Route 138. Interstate 5 connects to Route 138 from the West and U.S. Route 97 U.S. Route 97 (US 97) is a major north–south route of the United States Numbered Highway System in the Pacific Northwest region. It runs for approximately through the states of California, Oregon, and Washington, primarily serving in ... from the East. Route 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glide, Oregon
Glide is a census-designated place (CDP) in Douglas County, Oregon, United States. The population was 1,795 at the 2010 census. Geography According to the United States Census Bureau, the CDP has a total area of , of which is land and , or 0.59%, is water. Climate Demographics As of the census of 2000, there were 1,690 people, 624 households, and 484 families in the CDP. The population density was 167.3 people per square mile (64.6/km). There were 675 housing units at an average density of 66.8 per square mile (25.8/km). The racial makeup of the CDP was 99.99% White, and 0.01% other. Of the 624 households 36.1% had children under the age of 18 living with them, 65.9% were married couples living together, 7.4% had a female householder with no husband present, and 22.4% were non-families. 18.1% of households were one person and 6.9% were one person aged 65 or older. The average household size was 2.71 and the average family size was 3.06. The age distribution was 28.6% under ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Little River (North Umpqua River)
The Little River is a tributary of the North Umpqua River, about long, in southwestern Oregon in the United States. The map quadrangles include river mile (RM) markers along the Little River for . The additional length is an estimate based on map scale and ruler. It drains part of the western side of the Cascade Range east of Roseburg, between the North and South Umpqua. Little River rises north of Quartz Mountain in eastern Douglas County in the Umpqua National Forest. It flows west-northwest and joins the North Umpqua from the south at Glide, approximately 12 miles (19 km) east-northeast of Roseburg. The confluence is known as Colliding Rivers because of the nearly head-on angle at which the streams meet. The current Colliding Rivers Information Center was originally the North Umpqua Ranger Station of the Umpqua National Forest. It was built in 1938 by the Civilian Conservation Corps and United States Forest Service (USFS). It was converted to a residence in the 1950s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
