Pima-Maricopa Irrigation Project

Gila River Indian Irrigation & Drainage District




Vision

The Pima-Maricopa Irrigation Project (P-MIP) has developed a unique vision statement. It is unique in that it is a reflection of what the Project sees the Gila River Indian Community looking like in twenty years. (read more)

Mission

To develop a distribution system, agricultural lands and riparian habitat areas for beneficial use of water resources.

History

River People by N.E. Allen

The evidence of irrigation here within the Gila River Valley can be scientifically traced to prehistoric times. A civilization evolved about the time the Christian calendar was started and continued for a millennium. Although the evidence of their irrigation system has eroded through time, there are still faint traces which are found. Many of today's projects in the industrial and commercial areas provide these glimpses of the prehistoric past. Huhukam, a name applied to this ancient civilization of prehistoric times, ended around 1450 AD according to scientific evidence.

However, just about two hundred years later the Spanish arrived to find people living here in the Gila River Valley with an agricultural system well in place. The Akimel O'othom, or Pima as they are known. Pima was a name given to them by the Spanish, but in their own language they call themselves Akimel O'othom, (river people). We are still here today, still living in the same valley our ancestors did. A belief that is still strong even in this day and age. The only difference today is that we reside on a reservation, the Gila River Indian Community.

Today the Akimel O'othom are in the formative process to establish an irrigation system which will provide water to just over 146,000 acres. A monumental project which has been labeled the Pima-Maricopa Irrigation project (P-MIP). It has just been about two thousand years since the Huhukam began the first irrigation system in North America. Does History repeat itself?

Irrigation on the Gila River by N.E. Allen

Since before the arrival of the Bearded Ones (Spanish) the waters of the Gila River has provided for the Akimel O'othom. The Spanish gave these desert farmers a name which is still used today: PIMA.

The O'othom were here in village clusters and had a well-defined irrigation system in place. The O'othom had crops of corn, beans and squash, grown in abundance. These were the food crops but they also found cotton and tobacco being cultivated. Their villages dotted the entire Gila River Valley, to the East as far as Florence, to the West near the base of the Estrellas or Komatke as they are called by the O'othom.

The Spanish found these people diverting the waters of the Gila into canals they had constructed, with the aid of only wood and stone tools, which extended for miles and miles. Their engineering ability was amazing to these new arrivals. From the larger canals they had headgate to divert waters to the actual field of crops. It was a combined effort with each village responsible for the maintenance of the canal system to their fields and village. Field houses were often put up near the fields but home was in the main village.

The O'othom people are a peaceful group and worked together on large scale projects. For instance, in the rebuilding of a house which was lost by fire, the village would rebuild it in a matter of days. Materials would be gathered such as posts and beams for the roof and corners, arrowweeds obtained from the banks of the river. Labor was from the village and food was provided for the noon lunch. There was no monetary exchange but food was donated by the families and the ladies did the cooking. Not only did they do the cooking but also helped in the actual house or structure construction.

It was also a time for visiting with old friends and relatives. The elders would sit in the shade and watch over the grandchildren. Plus watch the progress and offer suggestions to the young men who still had much to learn.

Irrigation continued and there came a time when the Pee Posh came to the valley seeking refuge from their fellow people. Part of the Yuman groups along the Colorado, they came East to ask permission to live among the Akimel O'othom. They were welcomed and allowed to live and farm in what is now District Seven. Today they still coexist and therefore the name for the irrigation Project of today, the Pima-Maricopa Irrigation Project.

There came a time in the 1800's when the people who were so generous with their crops to the people crossing their lands to California began to see changes in the river flow. A good number of the settlers stayed in the upper Gila River Valley and began to use the waters, which affected the flow downstream. Due to their diversion upstream the waters finally stopped flowing down in the lower valley where the O'othom and Pee Posh lived. This major event forced some of the people to migrate to the Salt River Valley only to suffer the same fate, the eventual loss of water.

Today the people who now reside within the reservation of the Gila River Indian Community, the Pima and Maricopas, are in the planning stages of an irrigation project of monumental proportions. The plans are to establish an irrigation system to deliver water to 146,300 acres. From District 1 in the Blackwater area to the farms of the Pee Posh in District Seven. It will again take the effort of all the people to make major decisions, just like in the old days. There will be impacts to the community members in many ways and they will all have to be addressed. It will take years to complete but in the end the community members will once again hear the sweet music of rushing water.

P-MIP Today

Memorial Pipeline Control Gates

Drop at Pima Canal Inlet

Discharge near Memorial Pipeline Inlet

Typical Canal Diversion

Typical Canal Diversion

Typical Pima Canal Check Structure

Flood Protection

Four Mile Post Pipeline Inlet

Automated Trash Racks on Pima Canal

Education

Loss of the Gila River Waters

Moving towards the San Carlos Project

When the River Ran: 1690-1852

Creation of the Reservation: 1852-1865

History of the Gila River Water Settlement Act of 2004

Employment Opportunities

(Last Updated February 11, 2025)

For all Gila River Indian Community employment opportunities, please visit GilaRiver.org Opportunities

The following positions are currently available at GRIIDD:

Civil Engineer (Irrigation)
Equipment Service Worker
Finance Director
Heavy Equipment Operator
Irrigation Delivery Specialist
Mechanic

For information about these GRIIDD positions, please contact:
Jessica Romo, Assistant General Manager
Gila River Indian Irrigation & Drainage District
(520) 562-6786, Direct Office Line
(520) 562-2840, Fax Line
E-Mail

For information about available positions at P-MIP, please contact:
Kathy Kubilus, Senior Accountant
Pima-Maricopa Irrigation Project
(520) 562-6702, Direct Office Line
(520) 562-6791, Fax Line
E-Mail

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GIS Portal

- View high performance web maps of the P-MIP System from your browser
- View locations of goundwater monitoring wells and view historical groundwater levels
- View irrigation development and system photos

FTP Sites

Web browsers other than Internet Explorer will no longer open FTP sites. To open one of our FTP sites, copy and paste this address into the address bar of either Internet Explorer or File Explorer in Windows:

ftp://gilariver.com

It should then prompt for a username and password which will be provided to you via e-mail when appropriate. After entering the username and password you should be able to copy and paste files to and from the FTP site.

Contact Information

Pima-Maricopa Irrigation Project
192-A South "A" Street
P.O. Box C
Sacaton, AZ 85147
Phone: (520) 562-6700
FAX: (520) 562-6791

Gila River Indian Irrigation & Drainage District
192-E South "A" Street
P.O. Box 2202
Sacaton, AZ 85147
Phone: (520) 562-6720
Fax: (520) 562-2840

You can also e-mail P-MIP or GRIIDD