What we'd like you to know about Centennial Airport and Denver Metroplex

Centennial Airport feels strongly the Federal Aviation Administration (FAA) has not followed federal requirements to fully inform residents of the impact of the Denver Metroplex project, not just five years from now, but 20 years from now.

Centennial Airport values its long-standing relationship with neighboring communities

Centennial Airport has worked closely, for more than 20 years, with neighboring communities, residents, and local municipalities to achieve an approved noise mitigation plan. Not knowing the full impact of Denver Metroplex risks upending decades of work and collaboration among airport staff and the Centennial Airport Community Noise Roundtable (CACNR), specifically;

  • Centennial Airport’s current noise compatibility program, which has been in place since 2007

  • Efforts on behalf of (CACNR)—a grassroots effort that spans two counties and seven communities—to work in concert with the airport to educate pilots, residents, community planners, and developers on ways to balance the needs of the community with the needs of the airport.

    More than $2 million invested by the airport in specialized GIS-based mapping systems, noise monitors, Part 150 studies, and other efforts to identify—for the public—those areas most impacted by noise.

Centennial Airport has formally expressed concern on behalf of its stakeholders and is asking the FAA to “do the right thing.”

  • In order to shed light on the potential impact, on June 5, 2019, the Arapahoe County Public Airport Authority, which owns and operates Centennial Airport, has filed comments with the FAA, during the specified public comment period, challenging the Denver Metroplex Draft Environmental Assessment.

Supporting Document: Centennial Airport's Letter to the FAA

Supporting Document: FAA’s Environmental Draft 

Centennial Airport specifically asks the FAA to:

  • Provide data about environmental impacts for altitudes BELOW 3,000 feet. The FAA’s current Draft Environmental Assessment only looks at impacts at altitudes ABOVE 3,000 feet. People don’t live at 3,000 feet above the ground.
  • Complete the federally mandated studies that directly impact Metroplex implementation as specified in the FAA Reauthorization Act of 2018 and make the results of those studies public before moving forward with this project.

Bottom line: Centennial Airport feels there’s important environmental information missing from the FAA’s Draft Assessment as is evidenced in cases filed in response to other Metroplexes

  • The FAA claims, in its Draft Environmental Assessment, there is “no significant impact,” but Metroplexes around the country have resulted in thousands of citizens impacted by new overflights and airplane noise. Multiple communities have filed suit against the FAA in response to these new noise impacts.
    • Phoenix
    • Los Angeles
    • Maryland

  • Centennial Airport stands with its neighboring communities and we want the FAA to address these concerns now—NOT AFTER implementation.

Denver Metroplex Timeline

April 21, 2019

Metroplex Draft E/A released by FAA

April 21, 2019

April 22, 2019

Public comment opens

FAA sets Draft Environmental Assessment public comment period. Comments accepted April 22, 2019 through June 6, 2019. 

April 29, 2019

Public workshops

FAA hosts a series of 12 public workshops, beginning April 29 and concluding May 16.

April 29, 2019

June 5, 2019

ACPAA files public comment letter

Arapahoe County Public Airport Authority files a letter with FAA during the Metroplex public comment period, asking for specific environmental data to be made public before implementing the Denver Metroplex. Read the letter here.

June 6, 2019

Public comment closes

FAA officially closes the public comment period. No further comments accepted.

June 6, 2019

June 19, 2019

Petition for review

Arapahoe County Public Airport Authority files a Petition for Review in the U.S. Court of Appeals District of Columbia Circuit asking the Court to review the FAA's April 22, 2019, Environmental Assessment for the Denver Metroplex Project.

Aug. 16, 2019

Voluntary motion to withdraw

ACPAA makes a voluntary motion to withdraw based on advisement the environmental assessment (EA) is still in draft form. FAA agrees to notify ACPAA when EA is final. ACPAA will then refile the petition for review.

Aug. 16, 2019

Nov. 18, 2019

FAA Releases DEN Metroplex Final Assessment and Errata

FAA Announces a new  32-day public comment period from Nov. 18 through Dec. 20.  For more information click here: DEN METROPLEX EA Status of Engagement.

Final EA documents available online: FINAL Environmental Assessment.

Dec. 18, 2019

Centennial Airport releases RESPONSE to FAA's Final EA

The airport's FORMAL RESPONSE was delivered via overnight carrier to the FAA's Des Moines, WA office as the FAA's website limits characters and does not permit the upload of documents.

Dec. 18, 2019

Jan. 20, 2020

FAA releases final Record of Decision (ROD)

FAA formally announces its finding of no significant impact (FONSI) and announces plans to implement Metroplex procedures on March 26, 2020. Read the announcement here.

March 24, 2020

Centennial Airport REFILES Petition for Review

Centennial Airport refiles its petition for review in the U.S. District Court of Appeals, D.C.
Click here to read the March 24 petition.

March 24, 2020

Nov. 24, 2020

Centennial Airport files Petitioners' Opening Brief

Centennial Airport files Petitioners Opening Brief. 

Parties include Arapahoe County Public Airport Authority; City of Greenwood Village; Board of Commissioners of Gilpin County; Mountain Aviation, Inc.; Board of Commissioners of Arapahoe County; and Board of Commissioners of Douglas County.

Case No. 20-1075
Consolidated with Case No. 20-1085


Feb. 19, 2021

FAA files response to Petitioners' Opening Brief

Federal Aviation Administration files response to ACPAA's challenge to Denver Metroplex. 

Feb. 19, 2021

May 6, 2021

Oral arguments scheduled.

Oral Arguments to be heard in D.C. Court of Appeals.

06 May 2021

Oral Arguments STREAMED LIVE

Oral Arguments for the Denver Metroplex Case will be heard at 0930 EST (0730 MST) in the U.S. District Court of Appeals D.C. via the following channels:

YouTube Channel for the USDCA: CLICK  HERE (Begins at 32:07)  

Live Audio Stream (see link in very last sentence

Additionally, archived oral recordings are available after the hearing has closed.

06 May 2021

June 8, 2021

U.S. Court of Appeals DISMISSES petition for review

The U.S Court of Appeals dissmisses petition for review. citing lack of standing.

Download the judgement order here.