When filled with oil instead of fish or other commodities, a 42-gallon tierce weighed 300 pounds. The 42-gallon oil barrel was officially adopted in 1866. Today, a barrel’s refined products include about 20 gallons of gasoline, 12 gallons of diesel and 4 gallons of jet fuel and other products like liquefied petroleum gases and asphalt.

42 gallon oil barrel

After an 1859 Pennsylvania oil discovery – the start of the U.S. petroleum industry – barges floated barrels of oil down the Allegheny River to Pittsburgh to be refined into a highly demanded product – kerosene for lamps.

A handful of America’s earliest independent oilmen met in Titusville, Pennsylvania, and agreed that henceforth, 42 gallons would constitute a “barrel” of oil. It was August 1866 and northwestern Pennsylvania led the world in oil production.

42 gallon oil barrel

The 42-gallon standard was adopted by the Petroleum Producers Association in 1872.

Although pipelines would later challenge the oil region’s teamsters, the business of moving oil depended mostly on men, wagons, horses, flatboats, and barrels.

To reach railroad station and docks, teams of horses pulled wagons carrying as many as eight barrels of oil. Rugged northwestern Pennsylvania terrain and muddy roads added to transportation problems.

Meanwhile, as derricks multiplied, forests along Oil Creek were reduced to barrel staves by recently introduced barrel-making machinery. Hoop mills operated day and night supporting cooperages that sprang up to join in the oil boom in what would later be called “the valley that changed the world.”

Why a 42-gallon Oil Barrel?

Long before England’s King Richard III defined the wine puncheon as a cask holding 84 gallons and a tierce as holding 42 gallons, watertight casks of many sizes were crafted by “tight” coopers. Their guild, the Worshipful Company of Coopers, prescribed the manner of construction. Lesser skilled craftsmen (known as slack coopers) made casks, barrels, and pails for dry goods.

42 gallon oil barrel

Technologies for making watertight casks replaced “tight” coopers and their guild of Worshipful Company of Coopers. Standard Oil will introduce a steel version of the 42-gallon oil barrel in 1902 with the same traditional bilged, cask-like appearance.

By around 1700 in Pennsylvania, practical experience and custom had made the 42-gallon watertight tierce a standard container for shipping everything from eel, salmon, herring, molasses, soap, butter, wine and whale oil. The 42-gallon barrels became familiar 19th century containers.

Then came Edwin L. Drake’s 1859 oil discovery at Titusville, the first commercial U.S. oil well. The petroleum boom that followed it consumed wooden tierces, whiskey barrels, casks and barrels of all sizes.

When filled with crude oil instead of fish or other commodities, a 42-gallon tierce weighed more than 300 pounds – about as much as a man could reasonably wrestle. Twenty would fit on a typical barge or railroad flatcar. Bigger casks were unmanageable and smaller were less profitable.

Contemporary photographs show cooperages’ prodigious response to the new demand. Within a year of Drake’s discovery, oil barrels were commonly considered to hold 42 gallons according to “The Oil Fountains of Pennsylvania” in Littells’ Living Age of September 1860.

By 1866, these abundant tierce-sized barrels were the logical choice to become the industry’s standard measure.

The 42-gallon standard oil barrel was officially adopted by the Petroleum Producers Association in 1872 and by the U.S. Geological Survey and the U.S. Bureau of Mines in 1882.

Pennsylvania’s “valley that changed the world” also has connections to college football’s Heisman Trophy. Among the late 19th century Titusville companies, the Oberly & Heisman cooperage on Bridge Street supplied 42-gallon barrels for the oil trade – providing Michael Heisman’s son John an afterschool job.

John Heisman played varsity football for Titusville High School as a guard on the varsity team from 1884 to 1887. He graduated in 1887 and went on to become the legendary football coach for whom the Heisman Trophy is named.

Standard Oil “Blue Barrel” Myth

A persistent oilfield myth says that the abbreviation “bbl” for a barrel of oil resulted from Standard Oil Company’s early practice of painting their barrels blue –bbl for “blue barrel.”

However, while Ida Tarbell’s controversial 1904 History of Standard Oil Company acknowledged the “holy blue barrel,” the abbreviation “bbl” had been in use before the 1859 birth of the petroleum industry.

In the early 19th century, wooden barrels of all capacities were common containers of trade: hogsheads, puncheons, tierces, butts, tuns, and other long since forgotten terms.

Shipping manifests reveal that quantities of honey, rum, whale oil, and other commodities were shipped by the “bbl” – well before John D. Rockefeller and Standard Oil’s blue barrels. For today’s industry, the abbreviation simply signifies a 42-gallon (159 liters) unit of measure…of any color.

Learn about the 55-gallon steel drum at The Remarkable Nellie Bly.

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