HAER No. AZ-50, San Carlos Irrigation Project, North and South of Gila River, Vicinity of Coolidge, Pinal County, Arizona: Photographs, Written Historical and Descriptive Data
Author(s): Christine Pfaff
The San Carlos Irrigation Project (SCIP) is significant for creating an integrated irrigation system to serve both Indian and non-Indian lands along the Gila River. Prior to project construction, irrigation of area lands was piecemeal and non-Indian agricultural development above the Gila River Indian Reservation had depleted water supplies for the Indians. Initial authorization of the project in 1916 and the passage of the San Carlos Act on June 7, 1924 culminated years of studies and efforts to develop water storage on the Gila River and restore water to the Pima Indians.
The project also incorporates a number of individual features that have engineering significance. These include Coolidge Dam for which HAER documentation has previously been completed (HAER No. AZ-7), Sacaton Dam, and China Wash Flume. Ashurst-Hayden Dam is significant as the primary diversion facility for the entire system. Lastly, the features found on SCIP are significant for demonstrating the evolution of the irrigation project as a dynamic system. The types and methods of construction found span many decades and document changes in design and technology.
This report includes the photographs and written historical and descriptive data for the San Carlos Irrigation Project in Pinal County, Arizona.
Cite this Record
HAER No. AZ-50, San Carlos Irrigation Project, North and South of Gila River, Vicinity of Coolidge, Pinal County, Arizona: Photographs, Written Historical and Descriptive Data, 50. Christine Pfaff. 1996 ( tDAR id: 437901) ; doi:10.6067/XCV8437901
This Resource is Part of the Following Collections
Agricultural or Herding • Canal or Canal Feature • Resource Extraction / Production / Transportation Structure or Features
Archaeological Overview • Architectural Documentation • Historic Background Research
Historic American Engineering Record • Photographs • San Carlos Irrigation Project
Arizona (State / Territory) • Casa Grande, AZ • Coolidge, AZ • Florence, AZ • Gila River • Gila River Indian Reservation • Pinal (County) • Sacaton, AZ • San Carlos Irrigation and Drainage District
20th Century • Early 20th Century • Historic • Mid 20th Century
min long: -111.959; min lat: 32.659 ; max long: -111.173; max lat: 33.109 ;
Individual & Institutional Roles
Contact(s): Salt River Project Cultural Resource Manager
Landowner(s): US Bureau of Indian Affairs
Submitted To(s): National Park Service, Western Region
HAER No.(s): AZ-50
|Name||Size||Creation Date||Date Uploaded||Access|
|1996_Pfaff_SanCarlosPhotographs_OCR.pdf||111.62mb||Mar 1, 1996||Nov 28, 2017 1:36:33 PM||Confidential|
|This file is unredacted.|