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96-835: The Redding Rage was a professional women's football team based out of Redding, California , that were members of the Independent Women's Football League . They played their home games at various locations in the Redding area. They played in the league's new Tier III along with the Cape Fear Thunder , the Detroit Demolition , the New Mexico Menace , the Nor Cal Red Hawks , the Orlando Mayhem , The Pittsburgh Pulse, and

192-599: A retail and housing boom in the late 1980s that continued until the mid-1990s. Also in the 1970s, the Market Street Redevelopment Project, established in 1968, began the development of the Midtown Mall. The mall was established to prevent further property deterioration and to restore and maintain the economic health of the downtown area's commercial and retail activity. The mall suffered multiple difficulties. The passage of Proposition 13 in 1978 reduced

288-553: A few years before, in 1868. The name was officially changed back to Redding by 1880. The area is inhabited by a tribe of Native Americans called the Wintu . At their height, the Wintu had as many as 239 villages in the Shasta County area. Although Europeans had been to California as early as 1542, when Juan Cabrillo sailed to what is now San Diego Bay , indigenous natives long remained

384-636: A hopper and a shaking screen or trommel which frees the desired minerals from the waste gravel. The minerals are then concentrated using sluices or jigs. Large drills are used to sink shafts, excavate stopes, and obtain samples for analysis. Trams are used to transport miners, minerals and waste. Lifts carry miners into and out of mines, and move rock and ore out, and machinery in and out, of underground mines. Huge trucks, shovels and cranes are employed in surface mining to move large quantities of overburden and ore. Processing plants use large crushers, mills, reactors, roasters and other equipment to consolidate

480-875: A mass of actual rock. Both types of ore deposit, placer or lode, are mined by both surface and underground methods. Some mining, including much of the rare earth elements and uranium mining , is done by less-common methods, such as in-situ leaching : this technique involves digging neither at the surface nor underground. The extraction of target minerals by this technique requires that they be soluble, e.g., potash , potassium chloride , sodium chloride , sodium sulfate , which dissolve in water. Some minerals, such as copper minerals and uranium oxide , require acid or carbonate solutions to dissolve. Explosives in Mining Explosives have been used in surface mining and sub-surface mining to blast out rock and ore intended for processing. The most common explosive used in mining

576-426: A mining operation. Once the analysis determines a given ore body is worth recovering, development begins to create access to the ore body. The mine buildings and processing plants are built, and any necessary equipment is obtained. The operation of the mine to recover the ore begins and continues as long as the company operating the mine finds it economical to do so. Once all the ore that the mine can produce profitably

672-503: A more sustainable future, the demand for metals is set to skyrocket. Between 2022 and 2050, an estimated 7 billion metric tons of metals will need to be extracted. Steel will account for the largest portion of this total at 5 billion tons, followed by aluminum at 950 million tons, copper at 650 million tons, graphite at 170 million tons, nickel at 100 million tons, and other metals. Notably, the energy expenditure required to extract these metals will soon surpass that of coal mining, highlighting

768-763: A negative environmental impact, both during the mining activity and after the mine has closed. Hence, most of the world's nations have passed regulations to decrease the impact; however, the outsized role of mining in generating business for often rural, remote or economically depressed communities means that governments often fail to fully enforce such regulations. Work safety has long been a concern as well, and where enforced, modern practices have significantly improved safety in mines. Unregulated, poorly regulated or illegal mining , especially in developing economies , frequently contributes to local human rights violations and environmental conflicts . Mining can also perpetuate political instability through resource conflicts . Since

864-601: A redesign contest. The 21st century has also seen a number of devastating wildfires near and in Redding. In 1999, the Jones Fire destroyed over 100 structures, followed by the Bear Fire in 2004. In late July 2018, the Carr Fire in Shasta County seriously impacted the Redding area with the destruction of at least 1,100 buildings, with several thousand more threatened, 38,000 people instructed to evacuate and 8 deaths. Most recently,

960-408: A strong inducement to extract these metals or to lease the deposits and collect royalties from mine operators. English, German , and Dutch capital combined to finance extraction and refining . Hundreds of German technicians and skilled workers were brought over; in 1642 a colony of 4,000 foreigners was mining and smelting copper at Keswick in the northwestern mountains. Use of water power in

1056-635: Is ammonium nitrate . Between 1870 and 1920, in Queensland Australia, an increase in mining accidents lead to more safety measures surrounding the use of explosives for mining. In the United States of America, between 1990 and 1999, about 22.3 billion kilograms of explosives were used in mining quarrying and other industries; Moreover " coal mining used 66.4%, nonmetal mining and quarrying 13.5%, metal mining 10.4%, construction 7.1%, and all other users 2.6%". Artisanal and small-scale mining (ASM)

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1152-407: Is 119 °F (48 °C) on July 6, 2024. Redding has an average possible sunshine of 88%, the second-highest percentage (after Yuma, Arizona ) of any US city. Summer overnight lows are unusually warm by Sacramento Valley standards and average warmer than coastal towns' daytime highs. The warmest night annually averages 79 °F (26 °C). Since the station opened in 1986, the hottest night

1248-539: Is Barry Tippin. Redding is a general law city operating under the council-manager form of government. Amtrak provides service to Redding station , operating its Coast Starlight daily in both directions between Seattle, Washington , and Los Angeles, California via Portland, Oregon ; Sacramento, California ; Oakland, California ; San Jose, California ; Santa Barbara, California and all Intermediate station stops. Amtrak Thruway also provides twice daily service to Stockton or Sacramento for connections to

1344-811: Is a blanket term for a type of subsistence mining involving a miner who may or may not be officially employed by a mining company but works independently, mining minerals using their own resources, usually by hand. While there is no completely coherent definition for ASM, artisanal mining generally includes miners who are not officially employed by a mining company and use their own resources to mine. As such, they are part of an informal economy . ASM also includes, in small-scale mining, enterprises or individuals that employ workers for mining, but who generally still use similar manually-intensive methods as artisanal miners (such as working with hand tools). In addition, ASM can be characterized as distinct from large-scale mining (LSM) by less efficient extraction of pure minerals from

1440-587: Is also planned service by Core Airlines in late 2024 to other cities in Northern California, Southern Oregon, and Western Nevada. The smaller Benton Airpark is located on the western side of Redding. This list includes notable persons who were born/raised/worked in, lived in, or whose identity was significantly influenced by Redding, as well as music groups that were founded in the area. Informational notes Citations Mining Modern mining processes involve prospecting for ore bodies, analysis of

1536-610: Is also served by the intercity bus companies Greyhound and Fronteras del Norte. Shasta Regional Transportation Agency has proposed a weekday commuter bus to/from Redding and the Sacramento Valley Station , following a route similar to the twice daily Amtrak Thruway 3 . Air transportation for the Redding area is provided by two airports, one a commercial one and one a general aviation airport. Redding Regional Airport , located south of Redding, has scheduled flights from SkyWest (United Express) and Avelo Airlines. There

1632-476: Is done by removing surface vegetation, dirt, and bedrock to reach buried ore deposits. Techniques of surface mining include: open-pit mining , which is the recovery of materials from an open pit in the ground; quarrying , identical to open-pit mining except that it refers to sand, stone and clay; strip mining , which consists of stripping surface layers off to reveal ore underneath; and mountaintop removal , commonly associated with coal mining, which involves taking

1728-586: Is in the 1st Senate District , represented by Republican Megan Dahle , and the 1st Assembly District , represented by Republican Heather Hadwick . In the United States House of Representatives , Redding is in California's 1st congressional district , represented by Republican Doug LaMalfa . The city council is composed of Mayor Tenessa Audette, Vice Mayor Jack Munns, Julie Winter, Mark Mezzano and Michael Dacquisto. The city manager

1824-613: Is mining upward, creating a sloping underground room, long wall mining , which is grinding a long ore surface underground, and room and pillar mining, which is removing ore from rooms while leaving pillars in place to support the roof of the room. Room and pillar mining often leads to retreat mining , in which supporting pillars are removed as miners retreat, allowing the room to cave in, thereby loosening more ore. Additional sub-surface mining methods include hard rock mining , bore hole mining, drift and fill mining, long hole slope mining, sub level caving, and block caving . Heavy machinery

1920-484: Is much more common, and produces, for example, 85% of minerals (excluding petroleum and natural gas) in the United States, including 98% of metallic ores. Targets are divided into two general categories of materials: placer deposits , consisting of valuable minerals contained within river gravels, beach sands, and other unconsolidated materials ; and lode deposits , where valuable minerals are found in veins, in layers, or in mineral grains generally distributed throughout

2016-413: Is not of immediate interest to the miner. The total movement of ore and waste constitutes the mining process. Often more waste than ore is mined during the life of a mine, depending on the nature and location of the ore body. Waste removal and placement is a major cost to the mining operator, so a detailed characterization of the waste material forms an essential part of the geological exploration program for

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2112-581: Is one of 14 Arts and Culture Districts recognized by the State of California Arts Council. The district includes Downtown Redding; the adjacent Turtle Bay Complex; and City of Redding Parks across the Sacramento River from Downtown and Turtle Bay. According to the city's 2016 Comprehensive Annual Financial Report, the top employers in Redding are: In the California State Legislature , Redding

2208-584: Is recovered, reclamation can begin, to make the land used by the mine suitable for future use. Technical and economic challenges notwithstanding, successful mine development must also address human factors. Working conditions are paramount to success, especially with regard to exposures to dusts, radiation, noise, explosives hazards, and vibration, as well as illumination standards. Mining today increasingly must address environmental and community impacts, including psychological and sociological dimensions. Thus, mining educator Frank T. M. White (1909–1971), broadened

2304-634: Is the largest producer of diamonds in Africa, with an estimated 12 million carats in 2019. Other types of mining reserves in Africa include cobalt , bauxite , iron ore , coal, and copper . Gold and coal mining started in Australia and New Zealand in the 19th century. Nickel has become important in the economy of New Caledonia . In Fiji , in 1934, the Emperor Gold Mining Company Ltd. established operations at Vatukoula , followed in 1935 by

2400-423: Is to conduct a feasibility study to evaluate the financial viability, the technical and financial risks, and the robustness of the project. This is when the mining company makes the decision whether to develop the mine or to walk away from the project. This includes mine planning to evaluate the economically recoverable portion of the deposit, the metallurgy and ore recoverability, marketability and payability of

2496-419: Is used in mining to explore and develop sites, to remove and stockpile overburden, to break and remove rocks of various hardness and toughness, to process the ore, and to carry out reclamation projects after the mine is closed. Bulldozers, drills, explosives and trucks are all necessary for excavating the land. In the case of placer mining , unconsolidated gravel, or alluvium , is fed into machinery consisting of

2592-738: The San Joaquins , which serve the San Francisco Bay Area , San Joaquin Valley and the Los Angeles area via bus connections. Redding's municipal bus transportation system is called RABA ( Redding Area Bus Authority ). RABA serves routes throughout the City of Redding and also provides transportation to/from Redding's suburbs. Transportation is also available by RABA to Burney , by Sage Stage to Alturas and by Trinity Transit to Weaverville . Redding

2688-783: The Central Valley , which transitions into the Cascade foothills . The city is surrounded by mountains to the north, east, and west and fertile farm land to the south. Outermost parts of the city are part of the Cascade foothills, whereas southern and central areas are in the Sacramento Valley . The elevation in Redding is 495 feet (151 meters) on average, whereas anywhere to the north, east, or west of downtown ranges between 550 and 800 feet (170 and 240 m). Southern portions range between 400 and 500 feet (120 and 150 m). The Shasta Dam on

2784-525: The Fawn Fire in 2021 also resulted in the evacuation of over 4,000 people and the destruction of 185 buildings. According to the United States Census Bureau , the city has a total area of 61.2 square miles (159 square kilometers). 59.6 square miles (154 km ) of it is land, and 1.5 square miles (3.9 km ) of it (2.50%) is beneath water. Redding is located at the very northwestern end of

2880-513: The Greek author Diodorus Siculus , who mentions fire-setting as one method used to break down the hard rock holding the gold . One of the complexes is shown in one of the earliest known mining maps. The miners crushed the ore and ground it to a fine powder before washing the powder for the gold dust known as the dry and wet attachment processes. Mining in Europe has a very long history. Examples include

2976-615: The Sacramento River provides a considerable level of flood protection for Redding. The dam is capable of controlling flows up to 79,000 cubic feet (7,300 cubic meters) per second. The flow rate exceeded this threshold in both 1970 and 1974. Soils in and around town are composed mostly of clay or gravelly loam texture, with red or brown mineral horizons. They are slightly or moderately acidic in their natural state. There are several rare and endangered species in Redding and its immediate vicinity. The Redding Redevelopment Plan EIR notes

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3072-722: The Sacramento River , 162 miles (261 km) north of Sacramento , and 120 miles (190 km) south of California's northern border with Oregon . Its population is 95,542 as of 2022, up from 93,611 at the 2020 census . During the Gold Rush , the area that now comprises Redding was called Poverty Flats. In 1868 the first land agent for the Central Pacific Railroad , a former Sacramento politician named Benjamin Bernard Redding , bought property in Poverty Flats on behalf of

3168-610: The Shreveport Aftershock . This American football team article is a stub . You can help Misplaced Pages by expanding it . This article about a sports team in California is a stub . You can help Misplaced Pages by expanding it . Redding, California Redding is the county seat of Shasta County, California , and the economic and cultural capital of the Shasta Cascade region of Northern California . Redding lies along

3264-507: The argentiferous galena in the mines of Cartagena ( Cartago Nova ), Linares ( Castulo ), Plasenzuela and Azuaga , among many others. Spain was one of the most important mining regions, but all regions of the Roman Empire were exploited. In Great Britain the natives had mined minerals for millennia , but after the Roman conquest , the scale of the operations increased dramatically, as

3360-806: The greenstone of the Langdale axe industry based in the English Lake District . The oldest-known mine on archaeological record is the Ngwenya Mine in Eswatini (Swaziland) , which radiocarbon dating shows to be about 43,000 years old. At this site Paleolithic humans mined hematite to make the red pigment ochre . Mines of a similar age in Hungary are believed to be sites where Neanderthals may have mined flint for weapons and tools. Ancient Egyptians mined malachite at Maadi . At first, Egyptians used

3456-505: The 21st century begins, a globalized mining industry of large multinational corporations has arisen. Peak minerals and environmental impacts have also become a concern. Different elements, particularly rare-earth minerals , have begun to increase in demand as a result of new technologies. In 2023, 8.5 billion metric tons of coal were extracted from the Earth's crust. However, as the global economy transitions away from fossil fuels and toward

3552-767: The 40th Parallel North. The somewhat strange juxtaposition of its northern position within the United States and non-desert climate, with the extreme summer heat, has long been noted by visitors and residents. The exceptional temperatures found in the city are often cited in national news sources. Winter (October–April) provides the most precipitation of any season in Redding—the weather tends to be either rainy or foggy and at times, snow occurs. While summers are mostly hot and dry, thunderstorms are not uncommon. The average daily maximum temperature in July stays near 100 °F (37.8 °C). The highest official recorded temperature in Redding

3648-663: The 7th century to the 14th century. Gold was often traded to Mediterranean economies that demanded gold and could supply salt , even though much of Africa was abundant with salt due to the mines and resources in the Sahara desert . The trading of gold for salt was mostly used to promote trade between the different economies. Since the Great Trek in the 19th century, after, gold and diamond mining in Southern Africa has had major political and economic impacts. The Democratic Republic of Congo

3744-482: The California State listed endangered species, slender Orcutt grass ( Orcuttia tenuis ), occurs in eastern Redding near the municipal airport, where vernal pools are known to exist. This endemic grass is a Federal Candidate for listing and is endangered throughout its range, confined to several populations, and seriously threatened by agriculture , overgrazing , and residential development. Vernal pools provide

3840-644: The French crown to operate mines in 1733, becoming "the first practical miner on Lake Superior"; seven years later, mining was halted by an outbreak between Sioux and Chippewa tribes. Mining in the United States became widespread in the 19th century, and the United States Congress passed the General Mining Act of 1872 to encourage mining of federal lands. As with the California Gold Rush in

3936-526: The Gold Rush, 49ers found gold to the north on Rock, Middle and Salt creeks, near Shasta, California , and to the south along Oregon and Olney creeks but the area that is now Redding was poor placer gold ground and called Poverty Flats. In 1868 the first land agent for the Central Pacific Railroad, a former Sacramento politician named Benjamin B. Redding , bought property in Poverty Flats on behalf of

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4032-630: The Loloma Gold Mines, N.L., and then by Fiji Mines Development Ltd. (aka Dolphin Mines Ltd.). These developments ushered in a “mining boom”, with gold production rising more than a hundred-fold, from 931.4 oz in 1934 to 107,788.5 oz in 1939, an order of magnitude then comparable to the combined output of New Zealand and Australia's eastern states. During prehistoric times, early Americans mined large amounts of copper along Lake Superior 's Keweenaw Peninsula and in nearby Isle Royale ; metallic copper

4128-477: The Romans needed Britannia 's resources, especially gold , silver , tin , and lead . Roman techniques were not limited to surface mining. They followed the ore veins underground once opencast mining was no longer feasible. At Dolaucothi they stoped out the veins and drove adits through bare rock to drain the stopes. The same adits were also used to ventilate the workings, especially important when fire-setting

4224-589: The Spanish to pulverize ore after being mined. This device was powered by animals and used the same principles used for grain threshing . Much of the knowledge of medieval mining techniques comes from books such as Biringuccio 's De la pirotechnia and probably most importantly from Georg Agricola 's De re metallica (1556). These books detail many different mining methods used in German and Saxon mines. A prime issue in medieval mines, which Agricola explains in detail,

4320-730: The Umm el-Sawwan site; gypsum was used to make funerary items for private tombs. Other minerals mined in Egypt from the Old Kingdom (2649-2134 BC) until the Roman Period (30 BC-AD 395) including granite , sandstone , limestone , basalt , travertine , gneiss , galena , and amethyst . Mining in Egypt occurred in the earliest dynasties. The gold mines of Nubia were among the largest and most extensive of any in Ancient Egypt. These mines are described by

4416-430: The age of 18 living in them, 16,001 (44.3%) were married couples living together, 4,806 (13.3%) had a female householder with no husband present, 1,984 (5.5%) had a male householder with no wife present. There were 2,570 (7.1%) unmarried opposite-sex partnerships , and 204 (0.6%) same-sex married couples or partnerships . 10,344 households (28.6%) were made up of individuals, and 4,622 (12.8%) had someone living alone who

4512-624: The beginning of civilization, people have used stone , clay and, later, metals found close to the Earth's surface. These were used to make early tools and weapons; for example, high quality flint found in northern France , southern England and Poland was used to create flint tools . Flint mines have been found in chalk areas where seams of the stone were followed underground by shafts and galleries. The mines at Grimes Graves and Krzemionki are especially famous, and like most other flint mines, are Neolithic in origin (c. 4000–3000 BC). Other hard rocks mined or collected for axes included

4608-521: The bright green malachite stones for ornamentations and pottery . Later, between 2613 and 2494 BC, large building projects required expeditions abroad to the area of Wadi Maghareh in order to secure minerals and other resources not available in Egypt itself. Quarries for turquoise and copper were also found at Wadi Hammamat , Tura , Aswan and various other Nubian sites on the Sinai Peninsula and at Timna . Quarries for gypsum were found at

4704-417: The cutter-head is progressively launched further into the coal seam. High wall mining can produce thousands of tons of coal in contour-strip operations with narrow benches, previously mined areas, trench mine applications and steep-dip seams. Sub-surface mining consists of digging tunnels or shafts into the earth to reach buried ore deposits. Ore, for processing, and waste rock, for disposal, are brought to

4800-449: The economy and population to falter by 1920. It recovered in the thirties as the economy boomed due to the construction of Shasta Dam to the northwest. The building of the dam, which was completed in 1945, caused Redding's population to nearly double, also spurring the growth and development of other towns in the area. Redding continued to grow steadily in the 1950s due to the region's growing lumber industry and tourism brought about by

4896-698: The focus to the “total environment of mining”, including reference to community development around mining, and how mining is portrayed to an urban society, which depends on the industry, although seemingly unaware of this dependency. He stated, “[I]n the past, mining engineers have not been called upon to study the psychological, sociological and personal problems of their own industry – aspects that nowadays are assuming tremendous importance. The mining engineer must rapidly expand his knowledge and his influence into these newer fields.” Mining techniques can be divided into two common excavation types: surface mining and sub-surface (underground) mining . Today, surface mining

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4992-481: The form of water mills was extensive. The water mills were employed in crushing ore, raising ore from shafts, and ventilating galleries by powering giant bellows . Black powder was first used in mining in Selmecbánya , Kingdom of Hungary (now Banská Štiavnica , Slovakia) in 1627. Black powder allowed blasting of rock and earth to loosen and reveal ore veins. Blasting was much faster than fire-setting and allowed

5088-458: The form of another Market Street Redevelopment Project with significant changes to Midtown in 1990 to include a mix of residential and commercial land around the original project. Following redevelopment of Midtown, property values within the Market Street Redevelopment Project area improved; further redevelopment continued. A plan for the downtown area adopted in January 2001 led to the renovation of

5184-400: The growing importance of sustainable metal extraction practices. The process of mining from discovery of an ore body through extraction of minerals and finally to returning the land to its natural state consists of several distinct steps. The first is discovery of the ore body, which is carried out through prospecting or exploration to find and then define the extent, location and value of

5280-412: The historic Cascade Theatre , the removal of the Midtown Mall roof creating an open air pedestrian street, the installation of a visitor way-finding system, the completion of a Health Sciences and University Center with partnership with Shasta College , and the renovation of various buildings along California Street with the help of a private developer. In 2017, the city adopted a new flag after holding

5376-405: The latter to flow over the southern Sacramento valley during the summer months, producing intense heat in Redding. The direction of this winds switches from the north and east in the summer, as hot, high-pressure air flows from land to sea, making the area very dry. Tornadoes are extremely rare; flooding occurs only around the area near the Sacramento River. The coldest temperature recorded in Redding

5472-560: The mall's property valuation and consequently, the city had to continuously loan money to keep the bonds for the mall's parking structure from going into default; the bonds completely repaid in 2003 and Midtown began to pay off its more than $ 1.5 million debt to the City of Redding. By the 1980s, the properties around the mall and along the old State Highway 99 / 273 corridor continued to suffer urban blight, including deteriorating and dilapidated utilities and structures and inappropriate mixed land uses; this required further public intervention in

5568-525: The metals due to the difficulties of transporting them, but the copper was eventually traded throughout the continent along major river routes. In the early colonial history of the Americas, "native gold and silver was quickly expropriated and sent back to Spain in fleets of gold- and silver-laden galleons", the gold and silver originating mostly from mines in Central and South America. Turquoise dated at 700 AD

5664-753: The mid-19th century, mining for minerals and precious metals, along with ranching , became a driving factor in the U.S. Westward Expansion to the Pacific coast. With the exploration of the West, mining camps sprang up and "expressed a distinctive spirit, an enduring legacy to the new nation"; Gold Rushers would experience the same problems as the Land Rushers of the transient West that preceded them. Aided by railroads, many people traveled West for work opportunities in mining. Western cities such as Denver and Sacramento originated as mining towns. When new areas were explored, it

5760-492: The mid-sixteenth century. On the continent, mineral deposits belonged to the crown, and this regalian right was stoutly maintained. But in England, royal mining rights were restricted to gold and silver (of which England had virtually no deposits) by a judicial decision of 1568 and a law in 1688. England had iron , zinc , copper , lead , and tin ores. Landlords who owned the base metals and coal under their estates then had

5856-432: The minehead, where the water was stored in large reservoirs and tanks. When a full tank was opened, the flood of water sluiced away the overburden to expose the bedrock underneath and any gold-bearing veins. The rock was then worked by fire-setting to heat the rock, which would be quenched with a stream of water. The resulting thermal shock cracked the rock, enabling it to be removed by further streams of water from

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5952-431: The mining of previously impenetrable metals and ores. In 1762, one of the world's first mining academies was established in the same town there. The widespread adoption of agricultural innovations such as the iron plowshare , as well as the growing use of metal as a building material, was also a driving force in the tremendous growth of the iron industry during this period. Inventions like the arrastra were often used by

6048-580: The most in any calendar day on record. It rarely gets sleet or freezing rain. Frost occurs commonly in December through February, less often in March or November. In spring, rain is common. The city is located near the foothills of the Cascade and Klamath mountain ranges and it therefore gets much more rain than most places in the Sacramento Valley; temperature differentials between land and sea cause moist air from

6144-441: The newly completed dam. The constructions of Whiskeytown and Keswick dams also helped boost the economy by bringing new workers to the area. Interstate 5 was built during the sixties and seventies, which added to development and tourism in the region. Growth in Redding during the 1960s and 1970s was further spurred by the annexation of an area east of the Sacramento River that included the unincorporated community of Enterprise ;

6240-412: The only inhabitants of the Northern California region. The first European settlement in the area was established in 1844 by Pierson B. Reading , an early California pioneer who received a Rancho Buena Ventura Mexican land grant for 26,632 acres (10,778 ha) that is now covered by Redding and Cottonwood, California . At the time, it was the northernmost nonnative settlement in California. During

6336-405: The ore body. This leads to a mathematical resource estimation to estimate the size and grade of the deposit. This estimation is used to conduct a pre-feasibility study to determine the theoretical economics of the ore deposit. This identifies, early on, whether further investment in estimation and engineering studies is warranted and identifies key risks and areas for further work. The next step

6432-462: The ore concentrates, engineering concerns, milling and infrastructure costs, finance and equity requirements, and an analysis of the proposed mine from the initial excavation all the way through to reclamation. The proportion of a deposit that is economically recoverable is dependent on the enrichment factor of the ore in the area. To gain access to the mineral deposit within an area it is often necessary to mine through or remove waste material which

6528-442: The ore, lower wages, decreased occupational safety, benefits, and health standards for miners, and a lack of environmental protection measures. Artisanal miners often undertake the activity of mining seasonally. For example, crops are planted in the rainy season , and mining is pursued in the dry season . However, they also frequently travel to mining areas and work year-round. There are four broad types of ASM: Surface mining

6624-556: The overhead tanks. The Roman miners used similar methods to work cassiterite deposits in Cornwall and lead ore in the Pennines . Sluicing methods were developed by the Romans in Spain in 25 AD to exploit large alluvial gold deposits, the largest site being at Las Medulas , where seven long aqueducts tapped local rivers and sluiced the deposits. The Romans also exploited the silver present in

6720-560: The population) lived in owner-occupied housing units and 39,662 people (44.1%) lived in rental housing units. Redding is the economic hub of the Shasta Cascade region of Northern California . The Redding Metropolitan Statistical Area (MSA) was recognized as the 29th Most Dynamic MSA in the United States in 2019 by the Walton Family Foundation. Redding was recognized for having a diversified economy with several large employers in different sectors. The Redding Cultural District

6816-549: The preferred habitat for this plant, which the California Native Plant Society considers a rare and endangered species. These same vernal pools also support federally protected species such as the federally threatened vernal pool fairy shrimp (Branchinecta lynchi) . Redding has a hot-summer Mediterranean climate ( Köppen : Csa), with very hot, dry summers and cool, wet winters. Redding is known for very high summer temperatures, despite being located just north of

6912-430: The profit potential of a proposed mine, extraction of the desired materials, and final reclamation or restoration of the land after the mine is closed. Mining materials are often obtained from ore bodies, lodes , veins , seams , reefs , or placer deposits . The exploitation of these deposits for raw materials is dependent on investment, labor, energy, refining, and transportation cost. Mining operations can create

7008-455: The railroad for a northern terminus, which the tracks reached in 1872. In the process of building the terminus, the railroad also built the town of Redding which was officially incorporated on October 4, 1887. In 1888, Redding won the county seat from Shasta. In the early twentieth century the town's economic growth was spurred by the significant copper and iron mineral extraction industry nearby. The mining industry eventually declined, causing

7104-518: The railroad so that it could build a northern terminus there. In the process of building the terminus, the railroad also built a town in the same area, which they named Redding in honor of Benjamin Redding. In 1874, there was a dispute over the name by local legislators and it was changed for a time to Reading, in order to honor Pierson B. Reading , who arrived in the area in 1843, owned the Buenaventura land grant on which Redding sits, and had died only

7200-431: The remaining part of a coal seam previously exploited by other surface-mining techniques has too much overburden to be removed but can still be profitably exploited from the side of the artificial cliff made by previous mining. A typical cycle alternates sumping, which undercuts the seam, and shearing, which raises and lowers the cutter-head boom to cut the entire height of the coal seam. As the coal recovery cycle continues,

7296-470: The residents voted to support the annexation primarily to acquire less expensive electricity via Redding's municipal utility, which receives power from the dam. During the 1970s, the lumber industry suffered from decline. In the early 1990s Lumber mills in the area closed down due to the preservation of the living habitat of the Spotted Owl. This heavily impacted the Redding area. The economy picked up, due to

7392-446: The shafts could no longer be pumped dry with the available technology. Although an increased use of banknotes , credit and copper coins during this period did decrease the value of, and dependence on, precious metals , gold and silver still remained vital to the story of medieval mining. Due to differences in the social structure of society, the increasing extraction of mineral deposits spread from central Europe to England in

7488-558: The silver mines of Laurium , which helped support the Greek city state of Athens . Although they had over 20,000 slaves working them, their technology was essentially identical to their Bronze Age predecessors. At other mines, such as on the island of Thassos , marble was quarried by the Parians after they arrived in the 7th century BC. The marble was shipped away and was later found by archaeologists to have been used in buildings including

7584-474: The surface through the tunnels and shafts. Sub-surface mining can be classified by the type of access shafts used, and the extraction method or the technique used to reach the mineral deposit. Drift mining uses horizontal access tunnels, slope mining uses diagonally sloping access shafts, and shaft mining uses vertical access shafts. Mining in hard and soft rock formations requires different techniques. Other methods include shrinkage stope mining , which

7680-590: The tomb of Amphipolis. Philip II of Macedon , the father of Alexander the Great , captured the gold mines of Mount Pangeo in 357 BC to fund his military campaigns. He also captured gold mines in Thrace for minting coinage, eventually producing 26 tons per year. However, it was the Romans who developed large-scale mining methods, especially the use of large volumes of water brought to the minehead by numerous aqueducts . The water

7776-448: The top of a mountain off to reach ore deposits at depth. Most placer deposits, because they are shallowly buried, are mined by surface methods. Finally, landfill mining involves sites where landfills are excavated and processed. Landfill mining has been thought of as a long-term solution to methane emissions and local pollution. High wall mining, which evolved from auger mining, is another form of surface mining. In high wall mining,

7872-614: The top slats. Many examples of such devices have been found in old Roman mines and some examples are now preserved in the British Museum and the National Museum of Wales . Mining as an industry underwent dramatic changes in medieval Europe . The mining industry in the early Middle Ages was mainly focused on the extraction of copper and iron . Other precious metals were also used, mainly for gilding or coinage. Initially, many metals were obtained through open-pit mining , and ore

7968-461: The world's gold, followed by the establishment of large mines such as the Mount Morgan Mine , which ran for nearly a hundred years, Broken Hill ore deposit (one of the largest zinc-lead ore deposits), and the iron ore mines at Iron Knob . After declines in production, another boom in mining occurred in the 1960s. In the early 21st century, Australia remains a major world mineral producer. As

8064-468: The world, which was increasingly demanding copper for electrical and household goods. Canada's mining industry grew more slowly than did the United States due to limitations in transportation, capital, and U.S. competition; Ontario was the major producer of the early 20th century with nickel, copper, and gold. Meanwhile, Australia experienced the Australian gold rushes and by the 1850s was producing 40% of

8160-446: Was 16 °F (−9 °C) on January 17, 2012, and December 9, 2009. The average coldest daytime high of the year is 41 °F (5 °C) and the lowest on record is 29 °F (−2 °C) in 1990, which remains the latest year to record an ice day. The 2010 United States Census reported that Redding had a population of 89,861. The population density was 1,468.9 inhabitants per square mile (567.1/km ). The racial makeup of Redding

8256-419: Was 38.5 years. For every 100 females, there were 93.8 males. For every 100 females age 18 and over, there were 90.4 males. There were 38,679 housing units at an average density of 632.3 units per square mile (244.1 units/km ), of which 19,968 (55.3%) were owner-occupied, and 16,162 (44.7%) were occupied by renters. The homeowner vacancy rate was 2.3%; the rental vacancy rate was 6.9%. 48,179 people (53.6% of

8352-423: Was 65 years of age or older. The average household size was 2.43. There were 22,791 families (63.1% of all households); the average family size was 2.94. The population was spread out, with 20,518 people (22.8%) under the age of 18, 9,436 people (10.5%) aged 18 to 24, 21,725 people (24.2%) aged 25 to 44, 23,424 people (26.1%) aged 45 to 64, and 14,758 people (16.4%) who were 65 years of age or older. The median age

8448-563: Was 77,117 (85.8%) White , 1,092 (1.2%) African American , 2,034 (2.3%) Native American , 3,034 (3.4%) Asian , 156 (0.2%) Pacific Islander , 2,307 (2.6%) from other races , and 4,121 (4.6%) from two or more races. There were 7,787 people of Hispanic or Latino origin, of any race (8.7%). The Census reported that 87,841 people (97.8% of the population) lived in households, 1,138 (1.3%) lived in non-institutionalized group quarters, and 882 (1.0%) were institutionalized. There were 36,130 households, out of which 11,012 (30.5%) had children under

8544-503: Was 86 °F (30 °C) in June 2004. Redding's warm summer days and nights compared to areas further south are a result of a greater distance to maritime influences than the lower end of the valley. Redding occasionally receives snow, though it has received as much as 23 inches (58 centimeters) of snow in a single storm, occurring on December 4–7, 1909 and December 22–24, 1968, including 16 in (41 cm) on December 23, 1968,

8640-612: Was mined in pre-Columbian America; in the Cerillos Mining District in New Mexico , an estimate of "about 15,000 tons of rock had been removed from Mt. Chalchihuitl using stone tools before 1700." In 1727 Louis Denys (Denis) (1675–1741), sieur de La Ronde – brother of Simon-Pierre Denys de Bonaventure and the son-in-law of René Chartier – took command of Fort La Pointe at Chequamegon Bay ; where natives informed him of an island of copper. La Ronde obtained permission from

8736-576: Was primarily extracted from shallow depths, rather than through deep mine shafts. Around the 14th century , the growing use of weapons , armour , stirrups , and horseshoes greatly increased the demand for iron. Medieval knights , for example, were often laden with up to 100 pounds (45 kg) of plate or chain link armour in addition to swords , lances and other weapons. The overwhelming dependency on iron for military purposes spurred iron production and extraction processes. The silver crisis of 1465 occurred when all mines had reached depths at which

8832-406: Was still present near the surface in colonial times. Indigenous peoples used Lake Superior copper from at least 5,000 years ago; copper tools, arrowheads, and other artifacts that were part of an extensive native trade-network have been discovered. In addition, obsidian , flint , and other minerals were mined, worked, and traded. Early French explorers who encountered the sites made no use of

8928-411: Was the removal of water from mining shafts. As miners dug deeper to access new veins, flooding became a very real obstacle. The mining industry became dramatically more efficient and prosperous with the invention of mechanically- and animal-driven pumps. Iron metallurgy in Africa dates back over four thousand years. Gold became an important commodity for Africa during the trans-Saharan gold trade from

9024-403: Was used for a variety of purposes, including removing overburden and rock debris, called hydraulic mining , as well as washing comminuted , or crushed, ores and driving simple machinery. The Romans used hydraulic mining methods on a large scale to prospect for the veins of ore, especially using a now-obsolete form of mining known as hushing . They built numerous aqueducts to supply water to

9120-461: Was used. At other parts of the site, they penetrated the water table and dewatered the mines using several kinds of machines, especially reverse overshot water-wheels . These were used extensively in the copper mines at Rio Tinto in Spain, where one sequence comprised 16 such wheels arranged in pairs, and lifting water about 24 metres (79 ft). They were worked as treadmills with miners standing on

9216-539: Was usually the gold ( placer and then lode ) and then silver that were taken into possession and extracted first. Other metals would often wait for railroads or canals, as coarse gold dust and nuggets do not require smelting and are easy to identify and transport. In the early 20th century, the gold and silver rush to the western United States also stimulated mining for coal as well as base metals such as copper, lead, and iron. Areas in modern Montana, Utah, Arizona, and later Alaska became predominant suppliers of copper to

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