Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q2927978> ?p ?o }
- Q2927978 subject Q11406138.
- Q2927978 subject Q8581491.
- Q2927978 subject Q8581846.
- Q2927978 subject Q8665890.
- Q2927978 abstract "The Bull Run River is a 21.9-mile (35.2 km) tributary of the Sandy River in the U.S. state of Oregon. Beginning at the lower end of Bull Run Lake in the Cascade Range, it flows generally west through the Bull Run Watershed Management Unit (BRWMU), a restricted area meant to protect the river and its tributaries from contamination. The river, impounded by two artificial storage reservoirs as well as the lake, is the primary source of drinking water for the city of Portland, Oregon.It is likely that Native Americans living along the Columbia River as early as 10,000 years ago visited the Bull Run watershed in search of food. Within the past few thousand years they created trails over the Cascade Range and around Mount Hood, near the upper part of the Bull Run watershed. By the mid-19th century, pioneers used these trails to cross the mountains from east to west to reach the fertile Willamette Valley. In the 1890s, the City of Portland, searching for sources of clean drinking water, chose the Bull Run River. Dam-building, road construction, and legal action to protect the watershed began shortly thereafter, and Bull Run water began to flow through a large pipe to the city in 1895.Erosion-resistant basalt underlies much of the watershed, and streams passing over it are relatively free of sediments. However, turbidity increases when unstable soils sandwiched between layers of basalt and other volcanic rocks are disturbed and wash into the river during rainstorms. Despite legal protections, about 22 percent of the protected zone was logged during the second half of the 20th century, and erosion increased. For a time in 1996, Portland had to shut down the Bull Run supply because of turbidity and switch to water from wells. A law passed later that year prohibited most logging in or near the watershed, and since then the Portland Water Bureau and the United States Forest Service have closed many of the logging roads and removed culverts and other infrastructure contributing to erosion.Mature trees, most of them more than 500 years old and more than 21 inches (53 cm) in diameter, cover about half of the watershed, and the rest of the watershed is also heavily forested. Annual precipitation ranges from 80 inches (2,000 mm) near the water supply intake to as much as 170 inches (4,300 mm) near the headwaters. More than 250 wildlife species, including the protected northern spotted owl, inhabit this forest. Downstream of the BRWMU, the watershed is far less restricted. In the late 19th century, an unincorporated community, Bull Run, became established near the river in conjunction with a hydroelectric project and a related railroad line. About 6 miles (10 km) of the lower river is open to fishing and boating, and the land at the confluence of the Bull Run and Sandy rivers has been a public park since the early 20th century.".
- Q2927978 discharge "11.440006023572".
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- Q2927978 length "35244.6336".
- Q2927978 maximumDischarge "447.4061761694".
- Q2927978 minimumDischarge "0.84950539779".
- Q2927978 mouthElevation "74.0664".
- Q2927978 mouthRegion Q484404.
- Q2927978 riverMouth Q1584481.
- Q2927978 source Q1427290.
- Q2927978 sourceElevation "1298.1432".
- Q2927978 sourceMountain Q4996615.
- Q2927978 sourcePlace Q4996615.
- Q2927978 sourceRegion Q484404.
- Q2927978 state Q824.
- Q2927978 thumbnail Bull_run_dam_descent.jpg?width=300.
- Q2927978 watershed "3.6259833544704E8".
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