The Dolores River is a tributary of the Colorado River, approximately 241 miles (388 km) long, in the U.S. states of Colorado and Utah. The river drains a rugged and arid region of the Colorado Plateau west of the San Juan Mountains. Its name derives from the Spanish El Rio de Nuestra Señora de Dolores, River of Our Lady of Sorrows. The river was explored and possibly named by Juan Maria Antonio Rivera during a 1765 expedition from Santa Fe.
Malakoff Diggins State Historic Park is a state park unit preserving the largest hydraulic mining site in California, United States. The mine was one of several hydraulic mining sites at the center of the 1882 landmark case Woodruff v. North Bloomfield Mining and Gravel Company. The mine pit and several Gold Rush-era buildings are listed on the National Register of Historic Places as the Malakoff Diggins-North Bloomfield Historic District. The "canyon" is 7,000 feet (2,100 m) long, as much as 3,000 feet (910 m) wide, and nearly 600 feet (180 m) deep in places. Visitors can see huge cliffs carved by mighty streams of water, results of the mining technique of washing away entire mountains of gravel to wash out the gold. The park is a 26-mile (42 km) drive north-east of Nevada City, California, in the Gold Rush country. The 3,143-acre (1,272 ha) park was established in 1965.
The Comstock Lode is a lode of silver ore located under the eastern slope of Mount Davidson, a peak in the Virginia Range in Virginia City, Nevada, which was the first major discovery of silver ore in the United States and named after American miner Henry Comstock.
Uravan is an abandoned uranium mining town in western Montrose County, Colorado, United States, that is now a Superfund site. The town was a company town established by U. S. Vanadium Corporation in 1936 to extract the rich vanadium ore in the region. As a byproduct of vanadium extraction, small amounts of uranium were also produced, at the time mostly used as a yellow pigment.
A flume is a human-made channel for water, in the form of an open declined gravity chute whose walls are raised above the surrounding terrain, in contrast to a trench or ditch. Flumes are not to be confused with aqueducts, which are built to transport water, rather than transporting materials using flowing water as a flume does. Flumes route water from a diversion dam or weir to a desired materiel collection location. Flumes are usually made up of wood, metal or concrete.
The North Bloomfield Mining and Gravel Company of North Bloomfield, California, was established in 1866 and operated a hydraulic gold-mining operation at the Malakoff Mine subsequent to the California Gold Rush. In its day, no other company's operations matched North Bloomfield Mining and Gravel Company in size or expense. The company operated until 1910. In the years prior, its profits and procedures had been reduced due to the landmark ruling of Woodruff v. North Bloomfield Gravel Mining Company.
The Lee's Ferry and Lonely Dell Ranch Historic District includes the ranch homesteaded by Mormon pioneer John D. Lee at Lees Ferry, Arizona, and now in Glen Canyon National Recreation Area. It is notable for its association with Lee, the ferry and the ranch's extensive irrigation facilities. The district was originally designated the Lonely Dell Ranch Historic District on the National Register of Historic Places in 1978, but was expanded to include Lee's Ferry in 1997.
The Whisky Creek Cabin is a rustic log cabin located in southwest Oregon along the section of the Rogue River that is designated as a National Wild and Scenic River. It is the oldest remaining mining cabin in the Rogue River canyon. The Bureau of Land Management purchased the cabin and surrounding property in 1973. The Whisky Creek Cabin is listed on the National Register of Historic Places in 1975.
The Osceola Ditch, also known as the East Ditch, was built in 1889–1890 to convey water from Lehman Creek, Nevada to a hydraulic mine operation at Osceola. Extending for 18 mi (29 km), the ditch includes a 600 ft (180 m) tunnel as well as wooden flumes. The project also includes a rock dam and headgate on Stella Lake. The ditch's terminus at Osceola, Nevada became disused during the early 1900s and was destroyed entirely by a fire in the 1940s. Much of the East Ditch is included within Great Basin National Park.
Davidson Ditch is a 90-mile (140 km) conduit built in the 1920s to supply water to gold mining dredges in central Alaska. It was the first large-scale pipeline construction project in Alaska, and lessons learned in its construction were applied to the building of the Trans-Alaska Pipeline System. It is eligible for inclusion on the National Register of Historic Places, but has not been listed due to a lack of information. Despite this, the remains of the conduit are partially protected by its inclusion in the White Mountains National Recreation Area.
The historical buildings and structures of Zion National Park represent a variety of buildings, interpretive structures, signs and infrastructure associated with the National Park Service's operations in Zion National Park, Utah. Structures vary in size and scale from the Zion Lodge to road culverts and curbs, nearly all of which were designed using native materials and regional construction techniques in an adapted version of the National Park Service Rustic style. A number of the larger structures were designed by Gilbert Stanley Underwood, while many of the smaller structures were designed or coordinated with the National Park Service Branch of Plans and Designs. The bulk of the historic structures date to the 1920s and 1930s. Most of the structures of the 1930s were built using Civilian Conservation Corps labor.
Confederate Gulch is a steeply incised gulch or valley on the west-facing slopes of the Big Belt Mountains in the U.S. state of Montana. Its small stream drains westward into Canyon Ferry Lake, on the upper Missouri River near present-day Townsend, Montana. In 1864, Confederate soldiers on parole during the American Civil War made a minor gold discovery in the gulch, but the discovery of the sensationally rich Montana Bar the following year—one of the richest placer strikes per acre ever made—led to other rich gold strikes up and down the gulch, and touched off a frantic boom period of placer gold mining in the area that extended through 1869. From 1866 to 1869, the gulch equaled or outstripped all other mining camps in the Montana Territory in gold production, producing an estimated $19–30 million worth of gold. For a time, Confederate Gulch was the largest community in Montana. In 1866, Montana had a total population of 28,000, and of these, about 10,000 (35%) were working in Confederate Gulch.
The Crow Creek Water Ditch is a historic water transportation system which brought water from Eureka Creek to where it was needed in gold placer mining in the Indian Creek drainage area where gold was discovered in 1866. It is located near Townsend, Montana. It was built between 1866 and c.1875 originally to support gold mining, which required water, then later was used for farm and ranch irrigation.
Vicksburg was a town and mining camp in Chaffee County, Colorado, high in Clear Creek Canyon. It is now effectively a ghost town, although some of the buildings may be seasonally occupied by their owners. The site was listed on the National Register of Historic Places in 1977 ; a part of the town is maintained by the Chaffee County Historical Society as a museum. Four miles farther up the same road on which Vicksburg is located is another old mining camp named Winfield.
The China Ditch in Douglas County, in the U.S. state of Oregon, was a 30-mile (48 km) canal built in part by Chinese laborers to supply water for the hydraulic mining of gold. The Myrtle Creek Consolidated Hydraulic Gold Mining and Manufacturing Company began purchasing land for the ditch in 1890 and was bankrupt by 1894. Portions of the ditch, which carried water from Little River to North Myrtle Creek, remain visible, and an 11-mile (18 km) section is listed on the National Register of Historic Places.
The Independence Trail is located approximately 7 miles from downtown Nevada City within the South Yuba River State Park in the Sierra Nevada foothills within Nevada County, in Northern California. The trail is the former Excelsior Ditch, which was found and repaired by John Olmsted and a large group of local volunteers. It is notable for being the first ADA approved wheelchair nature trail. It topped the list of "favorite trails for 2013" in The Sacramento Bee newspaper.
Crow Creek is a stream in the Chugach Mountains, Alaska, US. It is the only notable tributary of Glacier Creek, which enters Turnagain Arm from the north, 12 miles (19 km) from its eastern end. The stream is notable as the site of ongoing gold mining since the late 19th century.
The Logan/Esterly Upper Ditch is an abandoned, artificial watercourse in the Illinois River Valley of northern California and southern Oregon, United States. Built in 1854 to supply water from the river's East Fork in California to several hydraulic mines in Oregon, it quickly returned a large profit to its investors. The ditch supplied mines worked by its own owners, as well as providing water for sale to other nearby diggings and incidentally powering at least one sawmill. Mines it served include the Waldo, Fry Gulch, and Cameron mines. It continued in operation until 1942, when the last hydraulic mining operations in the upper Illinois Valley ceased. Several wooden structures associated with the ditch, such as trestles and flumes, disappeared by the end of the 20th century, but the earthen components remained mostly intact.
The Electron Hydroelectric Project, originally known as the Puyallup Project, is a hydroelectric power plant operated by Electron Hydro LLC on the Puyallup River in Pierce County, Washington. It generates 22 megawatts (30,000 hp) of electricity and is operated and maintained by approximately 20 full-time employees.
Collingwood Water Race is a heritage-listed aqueduct at Monkhouse Timber Reserve, Rossville, Shire of Cook, Queensland, Australia. It was built from 1902 to 1906. It is also known as Annan River Company Water Race. It was added to the Queensland Heritage Register on 13 April 2006.
