Arizona Plans ‘Game-Changing’ Water System Overhaul

A planned interconnection facility will allow water to flow both ways between the Central Arizona Project and the Salt River Project.

1 minute read

November 10, 2025, 9:05 AM PST

By Diana Ionescu @aworkoffiction


Aerial of Central Arizona Project aqueduct full of dark turquoise water surrounded by Arizona desert.

Manuela Durson / Shutterstock

Arizona officials are working on a plan that would connect the Central Arizona Project (CAP) with the Salt River Project (SRP), increasing the flexibility of the state’s water supply. 

As Heidi Hommel explains for KTAR News, “The Central Arizona Project (CAP) delivers Colorado River water to about 80% of Arizona’s population through a canal system that stretches more than 300 miles.” The SRP draws water from the Salt and Verde Rivers, but cannot currently send water back to CAP, which uses a higher canal system that sends water to SRP using gravity. 

The proposed SRP–CAP Interconnection Facility (SCIF), which will be complete around 2028, will allow water to flow both ways between the two systems. However, the seven basin states must agree on new Colorado River operating guidelines next year, which could impact the project. 

Wednesday, November 5, 2025 in KTAR

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

November 11, 2026 - Zachary Whalen

A road in north eastern Nebraska with power lines on either side, and grassy fields.

Eastern Nebraska is running out of electricity

Data centers and electrification are straining eastern Nebraska’s grid, throttling economic development.

November 6, 2026 - Grist

People walking and cycling on a street in Boston.

Study reveals best places in the U.S. for cycling, walking

New research from Streetlight Data examines bicycle and pedestrian miles per capita in the 100 largest U.S. cities by population.

November 8, 2026 - Smart Cities Dive

Mamdani speaks behind a podium in a navy suit.

DSA members accuse Mamdani of 'abandoning values' over housing redevelopment

New York City's mayor plans to replace about 2,000 units of public housing with private, mixed-income housing.

November 12 - Gothamist

Streetview of Colorado boulevard, a multi-lane road with trees on either side.

All sides of BRT debate unhappy with CDOT’s most recent move

The Colorado Department of Transportation is no longer considering center-running bus lanes for Colorado Boulevard.

November 12 - 9 News

Solar panels above a cranberry boy, with workers collecting berries.

Massachusetts bogs generate both power, and cranberries

Putting solar panels above farmland is one way Massachusetts is advancing toward its goal of net-zero carbon emissions by 2050.

November 12 - Grist

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.