- Sumpter Valley Gold Dredge
name = Sumpter Valley Gold Dredge
caption = Sumpter Valley Gold Dredge
location = Sumpter, Baker County,
October 26, 1971
refnum = 71000676
Oregon Parks and Recreation Department
The Sumpter Valley Gold Dredge is a historic
gold dredgelocated in Sumpter, Oregon, United States. The dredge was built during the gold rushthat consumed most of the western states throughout the mid 1800s. Gold was discovered in Sumpter in 1862, but the advent of using a large machine to perform placer miningin Sumpter Valley did not occur until 1912. Three dredges were built between 1912 and 1934.
A gold dredge works by having large buckets that pull the gold-bearing earth up into its machinery to be processed, keeping the gold and spewing the waste (known as "tailings") out the back by way of a stacker. Built on a shallow hull, these dredges did not need a lot of water to operate, as they moved their pond of water with them.
The internal mechanics were not very sophisticated—they duplicated, on a larger scale, many of the devices used by placer mining throughout the gold rush, such as the gold pan and the
sluicebox. In essence, the dirt that was dug by the large electrically powered buckets was sifted and sorted, and the remainder was washed over a series of riffles allowing the gold to settle and be trapped. The primary advantages that made the dredge more efficient than other methods were the volume of earth it could process and having its own water supply. The dredge that was built in Sumpter Valley could dig over 20 buckets per minute, consuming more than seven yards of earth each minute.
Oregon State Parks and Recreation Departmenthas preserved this historic area as the Sumpter Valley Dredge State Heritage Area. [http://www.oregonstateparks.org/park_239.php Sumpter Valley Dredge State Heritage Area] ]
* [http://www.friendsofthedredge.com/ Friends of the Dredge]
* [http://www.historicsumpter.com/sumpter-oregon-dredge-park.html Historic Sumpter] article on the dredge
* [http://www.nps.gov/archive/yuch/Expanded/mining_history/coal_creek/what_is_a_dredge.htm What is a dredge?] at the
National Park Service
* [http://maps.google.com/maps?ie=UTF8&ll=44.70185,-118.130665&spn=0.062593,0.159645&t=k&z=13&om=0 Google Maps satellite image of the valley bottom showing dredge marks]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Gold dredge — The gold dredge is a mechanical method of extracting gold from sand and gravel. The gold dredge involves a mechanical method of digging up the gravel or dirt, using either buckets or suction. The material is then sorted and sifted using water… … Wikipedia
Sumpter (Oregón) — Sumpter Ciudad de los Estados Unidos Sumpter Valley Gold Dredge … Wikipedia Español
Sumpter, Oregon — Infobox Settlement official name = Sumpter, Oregon settlement type = City nickname = motto = imagesize = image caption = image imagesize = image caption = image mapsize = 250px map caption = Location in Oregon mapsize1 = map caption1 =… … Wikipedia
National Register of Historic Places listings in Baker County, Oregon — This is a list of properties and districts in Baker County, Oregon that are listed on the National Register of Historic Places. Map of all coordinates from Google Map of all coordinates from Bing … Wikipedia
Baker County, Oregon — Baker County Courthouse in Baker City … Wikipedia
North Fork John Day Wilderness — IUCN Category Ib (Wilderness Area) … Wikipedia
List of Oregon state parks — Main article: Oregon Parks and Recreation Department Crown Point and Vista House, taken from Portland Women s Forum viewpoint … Wikipedia
Oregon Caves National Monument — Coordinates: 42°05′44″N 123°24′21″W / 42.09556°N 123.40583°W / 42.09556; 123.40583 … Wikipedia
John Day Fossil Beds National Monument — Coordinates: 44°33′21″N 119°38′43″W / 44.55583°N 119.64528°W / 44.55583; 119.64528 … Wikipedia
Crater Lake National Park — IUCN Category II (National Park) … Wikipedia