Industries

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Entry Category: Industries

Hydroelectricity

Hydroelectric power is the electricity generated by the gravitational force of falling or flowing water through a turbine connected to a power generator. The three major types of hydropower facilities include reservoirs (high dams), in-stream (low dams), and pumped-storage. The most common type is the high dam, which creates significant reservoirs behind the dam (e.g., Hoover Dam). In 1882, the world’s first hydroelectric power station, located in Appleton, Wisconsin, produced 12.5 kilowatts of electrical power. Also in the early 1880s, a similar facility opened in New York City. Since these early facilities, hydroelectric power from the nation’s waterways has proliferated. Hydroelectric development in Arkansas can generally be grouped into three time periods—1924–1930; 1944–1973; and 1988–1999—and under three sponsoring agencies: Arkansas …

Industrial Sand Mining

Industrial sand is a term normally applied to high-purity silica sand products with closely controlled sizing. Industrial sand is a more precisely sized and shape-graded product than common sand used as aggregates in construction materials, such as concrete and asphalt. Typically, sand is composed predominantly of quartz (SiO2), and, in the case of industrial sand, the shape, size, and composition of the grains are important to determining suitable uses for the product. Sizing of industrial sand is typically done by screening and air sorting of a dried product. The term “sand,” as used by geologists, generally refers to individual grains that range in particle size from 0.00246 to 0.0787 inch (0.0625–2.0 millimeter) in diameter. This grain size ranges from just …

Lead and Zinc Mining

The history of lead and zinc mining in Arkansas is linked because ores of these two metals often occur together. Lead and zinc in Arkansas occur principally along the upper White River and its tributaries in Baxter, Boone, Independence, Lawrence, Marion, Newton, Searcy, Sharp, and Stone counties. Other locations include the Kellogg Mine in Pulaski County and the Ouachita Mountain mineral belt. Lead (Pb) is a soft, highly dense metal recognized for its low melting point and superb resistance to corrosion. Galena (PbS), containing about eighty-six percent lead, is the only lead mineral of commercial importance in Arkansas. Silver is sometimes found as an impurity that, in larger concentrations, can be extracted as a byproduct. Lead was once used to …

Levi Wilcoxon Demonstration Forest

The Levi Wilcoxon Demonstration Forest (LWDF) is located about three miles south of Hamburg (Ashley County) along U.S. Highway 425. Privately owned, the LWDF is a remnant of the old-growth pine forest that once covered much of southern Arkansas. The LWDF is notable for the dimensions of the loblolly and shortleaf pines still found within its boundaries—most of the pines in this roughly ninety-acre stand are between 100 and 200 years old and over 100 feet tall. For example, the “Morris Pine” is a loblolly fifty-six inches in diameter, 117 feet tall, and estimated to be at least 300 years old. The national champion shortleaf is also found in the LWDF and measures thirty-six inches in diameter and 136 feet …

Little Rock Picric Acid Plant

Arkansans supported the American effort in World War I in many ways. Some served in the armed forces, while others worked to grow and conserve food and make clothing and bandages for the troops. Many worked in a number of war industries, including a munitions plant built outside of Little Rock (Pulaski County) in 1918, tasked with manufacturing a high explosive—a rapid and destructive chemical explosive—known as picric acid. Picric acid (trinitrophenol) is made of phenol and several acid compounds that, when combined under proper conditions, form a honey-like substance that can be loaded into artillery shells. It is stable enough to survive the shock of being fired from a cannon, but, when detonated by a fuse, is very destructive. …

Manganese Mining

The mining of manganese ore was a very important economic activity in Arkansas between 1849 and 1959. The region around Batesville (Independence County)—including about 100 square miles located in northwestern Independence County, southeastern Izard County, and northeastern Stone County—has produced more than ninety-eight percent of the manganese ore shipped from Arkansas. A second area including portions of Polk and Montgomery counties also contains manganese ores. The first commercial exploitation of manganese was by Colonel Matthew Martin. Between 1848 and 1850, Martin purchased large tracts of land containing the ore, and, between 1850 and 1852, he shipped small quantities of manganese from Penter’s Bluff (Izard County) on the White River to Boston, New York, Philadelphia, and even Liverpool, England, where it …

Mercury Mining

aka: Cinnabar Mining
Mercury, which was first mined in Arkansas in 1931, is in most rock types in trace amounts, generally occurring at higher levels in shale and clay-rich sediments and organic materials like coal than in sandstone, limestone, or dolostone. Although mercury was widely used in the past for several applications, the market for products containing mercury steadily declined in the 1980s because it was recognized to be toxic. It still has important uses, however, in the chemical and electrical industries as well as in dental applications and measuring and control devices. The mercury-bearing district in southwest Arkansas occupies an area six miles wide by thirty miles long, extending from eastern Howard County through Pike County and into western Clark County. Surface …

Mining

Mining is defined as the extraction of valuable minerals or stone (mineral resources) from the earth, usually from an ore body, vein, or bed. Materials mined in Arkansas include base metals, iron, vanadium, coal, diamonds, crushed and dimension stone, barite, tripoli, quartz crystal, gypsum, chalk, and bauxite. Mineral resources are non-renewable, unlike agricultural products or factory-produced materials. Mining in a wider sense includes extraction of any non-renewable resource, including petroleum, natural gas, bromine brine, or even water. These resources are recovered by extractive methods that differ from those of normal surface or underground “hard rock” mining methods. Early settlers in the Arkansas Territory used several local mineral commodities. These included galena (lead ore), hematite and goethite (brown iron ores), saline …

Natural Gas

The earliest natural gas find is reported to have been in Scott County in 1887 during an effort to develop a commercial water well. The second recorded gas well was drilled two years later (also in Scott County) by an oil driller, Harry Kelly, to a depth of 1,600 feet. This was recognized as the first recorded effort to find oil in Arkansas, though “only gas was present.” No other efforts to find oil or gas were reported until 1901–1902, when the Mansfield Pool was developed by Choctaw Oil and Gas Company. While no oil was found, this effort did provide large amounts of gas, with some wells producing as much as 5 million cubic feet of gas per day. …

Oil Industry

The oil industry in Arkansas, which includes exploration and the production, refinement, and distribution of petroleum-based products, exploded onto the state’s economic scene in the early 1920s, and once-local production expanded into an international business. From 1920 to 2003, more than 1.8 billion barrels of oil were produced in Arkansas. Ten counties in Arkansas produce oil, all in the southern region of the state: Ashley, Bradley, Calhoun, Columbia, Hempstead, Lafayette, Miller, Nevada, Ouachita, and Union. Historically, most of this production has been in Union, Lafayette, Columbia, and Ouachita counties. These four counties have been responsible for more than eighty-five percent of the oil produced in the state. Evidence of oil in the state existed well before the oil boom of …

Peach Industry

Peaches are grown throughout the state of Arkansas with the highest concentrations being in central Arkansas  (Pope and Faulkner counties), western Arkansas (Johnson and Franklin counties), southwest Arkansas (Howard and Clark counties), northern Arkansas (Boone, Benton, and Washington counties), and Crowley’s Ridge in eastern Arkansas (Cross and St. Francis counties). Peaches are most successfully produced on light, sandy soils with at least thirty-six inches of soil depth. Orchards are usually placed on locations with raised elevations to avoid or lessen the impact of incidents of low temperature such as frosts. Peaches were introduced as a crop in Arkansas after the Civil War, as were many other fruits and vegetables, during the New South Diversification movement in agriculture. This movement was …

Pearl Rush

The rivers of northeast Arkansas once teemed with freshwater mollusks capable of producing pearls, which led to a huge “pearl rush” in the region in the late 1800s. The mussels had not been harvested on a large scale since Native Americans dwelled along these rivers, giving the animals—and the pearls within—time to grow. In an era before cultured pearls, these gems only occurred naturally, growing inside a freshwater mollusk or saltwater oyster, and the rarity of this occurrence made them precious. Native Americans used pearls to indicate elite status through adornment and burial practices. Burial sites in Campbell, Missouri, and Spiro, Oklahoma, revealed large quantities of freshwater pearls heaped in baskets or large shell vessels. A grave near present-day Helena-West …

Poultry Industry

A staple of the state’s economy, the Arkansas poultry industry first emerged in the 1890s. A century later, Tyson Foods, based in Springdale (Washington and Benton Counties), had become one of the largest agribusiness firms in the United States. Northwestern Arkansas, particularly Washington and Benton counties, produces the majority of poultry in Arkansas. The topography of the Ozark highlands—in contrast to the relatively flat eastern half of the state—is well suited to raising chickens. The hilly terrain has historically prevented the widespread cultivation of rice and cotton, which led northwestern Arkansas farmers to pursue interests in timber, fruit orchards, and especially poultry. By the early twenty-first century, poultry production had become an essential component of Arkansas’s economy, and Tyson Foods—with …

Quartz Mining

Arkansas is one of a small number of places in the world with enough quartz crystals to justify commercial mining. Though the amount of unmined quartz in the state is not yet known, Arkansas does have, in terms of both size and quality, some world-class deposits of quartz. Quartz is a common mineral that becomes crystallized under extreme geologic pressure. These crystals have been used to make oscillators for radios, computer chips, and clocks. Quartz crystals are also valued for their beauty as mineral specimens and gemstones. In 1967, the General Assembly adopted the quartz crystal as the Arkansas State Mineral. History of Quartz in Arkansas A quartz arrowhead that is estimated to be over 11,000 years old was discovered …

Rice Industry

Rice, the most popular grain in the world, is Arkansas’s leading agricultural product. Although it was only rarely grown in Arkansas before the twentieth century, rice came to dominate eastern Arkansas farms, beginning in the Grand Prairie but rapidly expanding into the Mississippi Delta and the Arkansas Valley. Domesticated rice (Oryza sativa) is not native to North America. It has been cultivated in central Asia for up to 6,500 years, and its use gradually spread to eastern and western Asia, the Mediterranean basin, and Africa. Roughly 40,000 official varieties of rice are recognized, but they usually are sorted into three categories: short-grain, medium-grain, and long-grain. While most rice is consumed as a grain, rice is also an ingredient in many …

Saltpeter Mining

Potassium nitrate, or saltpeter, is a naturally occurring mineral that is vital to the production of gunpowder. Found in limestone caves in the Arkansas Ozarks, it became one of the state’s most important chemical industries during the Civil War due to the Confederacy’s demand for arms. Although this resource was a definite advantage for the Confederacy, problems with labor, security, and transportation made Arkansas’s saltpeter mines an ultimate failure. Saltpeter deposits were known by early Arkansas settlers long before the Civil War in Madison, Searcy, Independence, Marion, and Newton counties. A geographical survey was conducted by Dale David Owens from 1857 to 1860. His findings were published in 1860, and, by 1862, the Confederacy, looking to arm itself for the …

Sand and Gravel Mining

aka: Gravel and Sand Mining
Sand is usually defined as an accumulation of mineral grains in sizes ranging from one-sixteenth to two millimeters. Sand normally consists predominantly of quartz grains of variable degrees of roundness. Other mineral grains within the sand size range are also present and typically consist of feldspar, chert, ilmenite, and other less abundant resistant minerals. Gravel is considered to be an unconsolidated mixture of rock fragments, pebbles, cobbles, and boulders of indefinite size, but always larger than sand-sized materials. Gravel normally consists of a mixture of rock types, depending upon the original source, and may consist of various quartz rock varieties, such as chert, sandstone, novaculite, agate, and milky vein quartz, as well as limestone, dolostone, and other resistant rock types. …

Silver Mining

The silver in Arkansas is mixed sulfide ores of lead, zinc, copper, and antimony in small, scattered deposits in parts of the southern and eastern Ouachita Mountains. Most of the known mining activity involving silver took place between 1840 and 1927 and rarely resulted in profit to owners and operators. Sale of claims or mines to unsuspecting investors was usually the only route to profit. The mines opened in the 1800s were shallow, reaching maximum depths of less than 200 feet. Most of the deposits where mining was undertaken are clustered in three groups. One is along Kellogg Creek in Pulaski County, north of the Arkansas River. Deposits in another group were clustered along tributaries near the confluence of the north …