A National Register of Historic Places Registration Form for the Empirita Ranch District. This document provides extensive details for the buildings and area surrounding the current ranch headquarters and has some very interesting details about the history of the area.

The summary from Section 7: Description:

The Empirita Ranch Historic District is located in Pima County, approximately 25 miles southeast of Tucson. It is located in the low desert grassland valley of Cienega Creek. The 366-acre parcel that is included in this nomination contains the major concentrations of built resources representing different phases of the ranch’s history. There are two primary concentrations of buildings and structures as well as remnants of irrigated agricultural fields. The district contains 28 built features that are associated with its function as a cattle ranch. Of these, 14 are contributing buildings and structures and one is a contributing agricultural field site. These resources date to the district’s period of significance and retain sufficient integrity to convey their significance.

The form was prepared by Janet Parkhurst, R.A.. James Ayres. Chester W. Shaw Jr.. Shannon Twilling (with editing by Kathryn Leonard and William Collins. Arizona SHPO)

Source: PDF from The National Archives Catalog.