Arizona's Central Irrigation District Gains 10,000 Acre-Feet of New Water Supply

In a significant move for Arizona’s agricultural sector, the Central Arizona Irrigation and Drainage District (CAIDD) has formalized an agreement with Cadiz Inc., granting access to up to 10,000 acre-feet of water supply annually from the Mojave Groundwater Bank. This memorandum of understanding (MOU) not only addresses the pressing water scarcity caused by prolonged drought conditions but also represents a strategic shift in how water is sourced and managed in the region.

With a vast area of approximately 87,600 irrigated acres in Pinal County, CAIDD plays a vital role in the local agricultural landscape, providing crucial water supplies to farms and businesses. The MOU marks a landmark moment as it is the first agreement of its kind between an Arizona water district and the Mojave Groundwater Bank—a significant shift amid increasing concerns regarding dwindling Colorado River resources which have historically supported much of Arizona's water needs.

For CAIDD, this partnership opens up new avenues for securing a reliable water supply, thus enhancing their agricultural resilience. As Colorado River deliveries shrink due to climate impacts and historical over-extraction, the Mojave Groundwater Bank will be pivotal in supplementing these diminishing sources. The agreement sets forth a framework for an interstate exchange of Colorado River water, allowing CAIDD to utilize this newly concentrated groundwater supply efficiently.

This collaboration also comes in the wake of the U.S. Department of Interior's Bureau of Reclamation initiatives aimed at assessing innovative water supply methods. As part of a broader strategy, Reclamation is currently exploring interstate exchange protocols that allow integration of fresh water supplies sourced outside the Colorado River system into the basin’s management framework.

Under the proposed terms of the agreement, CAIDD will commit to purchasing these groundwater supplies for an initial 50-year duration, with an option for renewal, indicating a long-term approach to resource management. The financial structure proposed includes a volumetric charge of $850 per acre-foot, reflecting ongoing operational and maintenance expenses. By fostering collaboration among federal and state agencies, CAIDD and Cadiz aim to minimize infrastructure costs while ensuring the flow of new water resources into Arizona.

Key figures, including Arizona House Representative Steve Montenegro, emphasize the innovative nature of this agreement. This project is seen as a necessary step not only for agriculture but also to support the larger economic framework as it encompasses advanced manufacturing and military sectors in Arizona.

The Mojave Groundwater Bank, the source of this vital supply, is strategically located within the Fenner Valley Aquifer System and is poised to deliver over 2.5 million acre-feet of supplemental water in the future. This ambitious project, developed in collaboration with the Lytton Rancheria, aims to tackle water shortages not just for agriculture but for broader community resilience within California and beyond.

As Arizona faces unprecedented challenges with its water supply, the agreement between CAIDD and Cadiz stands as a beacon of hope, showcasing an adaptive approach to resource management and inter-state cooperation. This groundbreaking initiative not only serves to protect and sustain Arizona's agricultural base but also fosters a collaborative spirit in tackling shared water challenges across the region. The successful implementation of this project could become a model for future water management strategies throughout the West, emphasizing the need for sound, sustainable practices to secure water supplies in the face of climate uncertainties and increasing demand.

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