National Register Listing
Listed in National Register of Historic Places in 2014.
Union Iron Works Historic District
a.k.a. Potero Works, Union Yard, Bethlehem Steel Yard; Potrero Yard, San Francisco Yard
E. of Illinois between 18th & 22nd Sts., San Francisco, CA Local significance of the district: Maritime History; Industry; Architecture
Listed in National Register of Historic Places in 2014.
About National Register Listings
The National Register of Historic Places is the official list of the Nation’s historic places worthy of preservation. Authorized by the National Historic Preservation Act of 1966, the National Park Service’s National Register of Historic Places is part of a national program to coordinate and support public and private efforts to identify, evaluate, and protect America’s historic and archeological resources.