The Environmental Consequences of the Arizona Border Wall

A segment of the planned U.S.-Mexico border wall would cut across the San Pedro River and threaten the area’s wildlife and plants.

1 minute read

January 14, 2020, 9:00 AM PST

By Camille Fink


San Pedro River

Katja Schulz / Flickr

The federal government plans to build a border across the San Pedro River in the San Pedro Riparian National Conservation Area in Arizona. The construction would involve cutting down Freemont cottonwood trees, which residents and experts say are integral to the ecology of the area.

"The cottonwoods not only provide bank stabilization and shade, but safe harbor for the millions of birds which pass through the desert oasis on their annual migrations," writes Shar Porier. A wall would also stop the flow of the river, cause debris backups, and keep wildlife from crossing. 

"The Bureau of Land Management (BLM) is charged with the preservation of the SPRNCA which relies on the river and currently awaits a court ruling on a claim for water rights its scientists say is necessary to maintain the 57,000 acre national conservation area and its threatened and endangered species," notes Porier.

Saturday, January 4, 2020 in Herald/Review

"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.

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

Lake Powell with much of the water evaporated.

Desperate measures: Advocates weigh draining Lake Powell to fill Colorado River

Draining the reservoir could reduce evaporation losses by a couple hundred thousand acre-feet.

October 30, 2026 - Yale Environment 360

People vote in Chicago behind blue privacy screens

Chicago voters approve permanent festival grounds, penalty for vacant property owners

Currently, major summer and fall festivals take over public parks for weeks at a time, drawing criticism from nearby residents

November 5 - Block Club Chicago

Mayor Zohran Mamdani speaks into a microphone. He wears a gray suit.

NYC votes to cut outdoor dining red tape, speed up permitting

New York City also voted to allow the Department of Transportation to begin work on urgent projects before notifying elected officials.

November 5 - The City Reporter

People in Los Angeles going to the polls, following a sign with an "I Voted" design

California appears to reject Prop. 45

The proposition would have expanded the projects that qualify for a streamlined environmental review, effectively paring down the California Environmental Quality Act.

November 5 - Cal Matters