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Okutadami Dam
Okutadami Dam is a 157 m concrete gravity dam on the Tadami River between Niigata and Fukushima, completed in 1960 and operated by J-POWER for hydropower.
Okutataragi hydroelectric plant
The Okutataragi hydroelectric plant, also called Okutataragi Pumped Storage Power Station (奥多々良木発電所), is a 1,932 MW pumped-storage plant in Asago, Hyogo Prefecture, Japan, and Japan's largest hydropower station.
Olaf A. Hougen
Olaf A. Hougen (1893–1986) was an American chemical engineer and longtime professor at the University of Wisconsin–Madison whose Langmuir–Hinshelwood–Hougen–Watson method remains standard for deriving catalytic rate expressions.
Olam Food Ingredients
Olam Food Ingredients, branded as ofi, is a global business-to-business supplier of food and beverage ingredients in cocoa, coffee, dairy, nuts, and spices, created by Olam Group in January 2020.
OLAP cube
An OLAP cube is a multidimensional data structure in online analytical processing that indexes measures by dimensions such as time, geography, and product, letting analysts aggregate business data quickly.
Olarizuko urmaela
Olarizuko urmaela, the Olarizu pond, is a periodically flooded wetland in the Olarizu fields south of Vitoria-Gasteiz, Spain, created as a flood-retention basin in 2014.
Olaroz Lithium Facility
The Olaroz Lithium Facility is a lithium brine operation on the Salar de Olaroz in Jujuy Province, Argentina, producing battery-grade lithium carbonate since 2014 at about 3,900 meters elevation.
Olay
Olay is an American skin-care brand owned by Procter & Gamble, launched in South Africa in 1952 by chemist Graham Wulff as Oil of Olay.
Olba Aqueduct
Roman aqueduct of Olba (Ὤλβα), Uğuralanı, Rough Cilicia, Turkey; drew Lamas River water from Kızılgeçit at about 1,175 m and crossed Seytan Deresi on a two-tiered Severan bridge about 150 m long.
Old Alton Bridge
Old Alton Bridge, also known as Goatman's Bridge, is an iron Pratt through-truss bridge built in 1884 over Hickory Creek in Denton County, Texas, now open only to hikers and horseback riders.
Old Bailey
The Old Bailey, formally the Central Criminal Court, is a criminal courthouse in the City of London handling the most serious offenses, opened by King Edward VII in 1907.
Old Bedford River
The Old Bedford River is a straight, 21-mile artificial drainage channel in the Fens of eastern England, cut between Earith and Salter's Lode and completed in 1637.
Old Blenheim Bridge
Old Blenheim Bridge was a wooden covered bridge with a 210-foot single span over Schoharie Creek in North Blenheim, New York, destroyed by flooding in 2011.
Old Crow
Old Crow is a Kentucky straight bourbon whiskey named for James C. Crow, first advertised in 1845 and now a bargain brand owned by James Beam.
Old Customs Building, Mexico City
The Old Customs Building (Antigua Aduana de Santo Domingo) is an 18th-century baroque government building facing the Plaza de Santo Domingo in Mexico City's historic center.
Old Dominion Electric Cooperative
Old Dominion Electric Cooperative (ODEC) is a not-for-profit wholesale generation and transmission cooperative incorporated in Virginia in 1948, serving 11 member distribution cooperatives that supply about 1.5 million people across Virginia, Maryland, and Delaware.
Old Dominion Freight Line
Old Dominion Freight Line is a large American less-than-truckload motor carrier headquartered in Thomasville, North Carolina, founded in 1934 with a single truck and now operating 260 service centers.
Old Florida State Capitol
The Old Florida State Capitol, now the Florida Historic Capitol Museum, served as Florida's statehouse in Tallahassee from 1845 to 1977 and reopened in 1982 as a museum.
Old Hall
Old Hall, chiefly Langley Old Hall, Burnhope, County Durham: early 16th-century Scrope fortified manor house, now a moated ruin, scheduled monument NHLE 1002328; the name also covers several Grade II listed English houses.
Old Harbour FSRU
The Old Harbour FSRU is a floating storage and regasification unit off Old Harbour Bay, Jamaica, the Caribbean's first, supplying the Old Harbour and Jamalco power plants since 2019.
Old London Bridge
Old London Bridge was the stone bridge across the Thames between the City of London and Southwark, completed in 1209 and standing for over 600 years until its demolition in 1831.
Old Oak Common railway station
Old Oak Common railway station is a station under construction in west London that will serve as the London interchange for High Speed 2, opening between 2029 and 2033.
Old Rectory
Old Rectory is the shared name of many former Church of England rectory houses, mostly Grade I to II listed, from the mid-14th-century Warton ruin to the 1787 Old Rectory of Bedford County, Virginia.
Old River Control Structure
The Old River Control Structure, also called the Old River Control Complex, is a gated dam complex in Louisiana that keeps the Atchafalaya River from capturing the Mississippi.
Old South Church
Old South Church in Boston is a United Church of Christ congregation gathered in 1669, worshiping since 1875 in a Ruskinian Gothic church in Copley Square.
Old South Meeting House
The Old South Meeting House is a 1729 brick Puritan meeting house in downtown Boston, best known as the staging ground for the Boston Tea Party.
Old Spanish Trail (auto trail)
The Old Spanish Trail was a 1910s and 1920s auto trail promoted as the shortest transcontinental highway, running from St. Augustine, Florida, to San Diego, California.
Old Spice
Old Spice is an American men's grooming brand created in 1937 by the Shulton Company, sold to Procter & Gamble in 1990, spanning deodorants, body washes, and shampoos.
Old St Paul's Cathedral
Old St Paul's Cathedral was the medieval cathedral of the City of London, built between 1087 and 1314, gutted by the Great Fire of 1666 and replaced by Wren's cathedral.
Old St. Peter's Basilica
Old St. Peter's Basilica, begun under Constantine in the fourth century over the apostle Peter's tomb on the Vatican hill, served western Christendom for about 1,200 years before demolition.