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Denver International Airport to Convert Underground Tunnels Into Public Walkways

Denver International Airport plans to open sections of its existing tunnel network as pedestrian walkways linking concourses A, B, and C. Construction is scheduled to start in 2027 and will be funded by airport revenue rather than taxes.

GB News
1 source·May 28, 11:34 PM(18 hrs ago)·1m read
Denver International Airport to Convert Underground Tunnels Into Public Walkwaysdenverpost.com
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Denver International Airport will convert portions of its underground tunnel system into pedestrian walkways connecting concourses A, B, and C. The project is intended to provide an alternative to the airport's current train system.

Construction is expected to begin in 2027.

The work will cost between $300 million and $700 million and will be financed through airport revenue, Denver International Airport CEO Phil Washington told CBS News. The tunnel conversion will occur alongside the airport's Vision 100 expansion plan, which includes renovation of the Great Hall.

Denver Mayor Mike Johnston said the decision responds to passenger requests for easier movement between concourses. He added that travelers may also gain a closer view of the tunnels.

The airport has been the subject of online speculation since its opening in 1995, with theories involving secret bunkers, military facilities, and other claims. The airport has stated that the tunnels are less than two miles long and contain work and office spaces.

In 2018 the airport launched the DENFILES campaign, which displayed images referencing the theories on construction barriers. The airport has also hosted an exhibition titled Conspiracy Theories Uncovered that displayed related artwork and photography.

Key Facts

Tunnel conversion
Sections turned into walkways between concourses A, B, and C
Cost range
$300 million to $700 million
Funding source
Airport revenue, not taxpayer funds
Start date
Construction expected in 2027

Story Timeline

3 events
  1. 1995

    Denver International Airport opened after construction delays.

    1 sourceGB News
  2. 2018

    Airport launched DENFILES campaign referencing tunnel theories.

    1 sourceGB News
  3. 2027

    Construction on tunnel walkways scheduled to begin.

    1 sourceGB News

Potential Impact

  1. 01

    Airport revenue will cover project costs instead of public tax dollars.

  2. 02

    Passengers will have a walking option between concourses once construction finishes.

  3. 03

    Vision 100 expansion work will occur at the same time as tunnel conversion.

Transparency Panel

Sources cross-referenced1
Confidence score65%
Synthesized bySubstrate AI
Word count202 words
PublishedMay 28, 2026, 11:34 PM
Bias signals removed2 across 1 outlet
Signal Breakdown
Editorializing 1Amplifying 1

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