Union Iron Works, located in San Francisco, California

San Francisco, California

San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

, on the southeast waterfront, was a central business within the large industrial zone of Potrero Point

Potrero Point

Potrero Point San Francisco is the location of the earliest and most important industrial facilities in the Western United States on the eastern extension of San Francisco's Potrero Hill, a natural land mass extending into San Francisco Bay south of Mission Bay. Potrero Point, the point of Potrero...

, for four decades at the end of the nineteenth and beginning of the twentieth centuries.
The Donahue Brothers Peter and James, Irish immigrants, founded Union Iron Works in the south of Market area of San Francisco in 1849. After years as the premiere producer of mining, railroad, agricultural and locomotive machinery in California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, Union Iron Works, led by I.M.