University of Arizona

Students, faculty, staff, and the public are now welcome to visit Special Collections without an appointment from 9 am to 4 pm, Monday through Friday.

Mining Shaft descriptions

Descriptions for mining shafts, including figures and assumptions about loads and supported and unsupported lengths

Kennecott Copper Corporation, Braden Unit Records
Special Collections at the University of Arizona Libraries
© Arizona Board of Regents for The University of Arizona

Land Acknowledgement

We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples. Today, Arizona is home to 22 federally recognized tribes, with Tucson being home to the O’odham and the Yaqui. Committed to diversity and inclusion, the University strives to build sustainable relationships with sovereign Native Nations and Indigenous communities through education offerings, partnerships, and community service.