Edgar Thomson Steel Works

The mill occupies the historic site of Braddock's Field, on the banks of the Monongahela River east of Pittsburgh.

On July 9, 1755, in the Battle of the Monongahela, French and Indian forces from Fort Duquesne defeated the expedition of British General Edward Braddock, who himself was mortally wounded.

Braddock's Field was also the site of a rally of rebellious militiamen and farmers during the Whiskey Rebellion, prior to a massive march on the town of Pittsburgh on August 1, 1794.

[1] The site is on the banks of the Monongahela, which provides cost-effective, riverine transportation of coke, iron, and finished steel products.

Some of the partners, stockholders, and connected people were William Coleman, Andrew Kloman, Henry Phipps Jr., David McCandless, Wm.

Those steel and coke works that were consolidated were: The merging of these separate business operations into one resulted in the newly formed company owning an interest of nearly $5 million.

"[5] With continual improvements in production the mill was capable of producing 225 tons of steel rails per day.

[11] Among improvements to its physical plant is a $250 million continuous caster, which converts liquid steel directly into slabs, installed in 1992.

In April 1995, the mill was designated a historic landmark by ASM International, a society that honors works of structural engineering.

The Mon Valley Works would have been the first facility in the United States to incorporate technology combining thin slab casting and hot rolled band production into one continuous process.