In a June 19, 2020 Findings of Fact, Conclusions of Law, and Judgment (“Judgment”), the District Court of Jefferson County, Colorado, in Board of Commissioners of Adams County v. City and County of Denver, recounted in detail the expert testimony offered by Adams County, that fatally undercuts the traditional reliance by the City of Denver, operator of Denver International Airport (“DIA”), and airport operators in general, on “noise modeling” in place of “noise monitoring” to determine the impacts of the aircraft noise on surrounding communities.

The Judgment exhaustively recounted evidence offered by Adams County, detailing the flaws in the noise modeling utilized by DIA to document compliance with the noise provisions of the “Intergovernmental Agreement [for a new airport], (‘IGA’),” originally entered into between the two parties on April 21, 1988, when the plan for development of the new Denver airport was being initiated.


Continue Reading Colorado Court Judgment Finds Noise Modeling Significantly Understates Aircraft Noise

In the FAA Reauthorization Act of 2018, Pub. L. 115254, § 188, Congress required the Federal Aviation Administration (“FAA”) to “evaluate alternative noise metrics to current average day-night level standard, such as the use of actual noise sampling to address community airplane noise concerns.” In its April 14, 2020 Report to Congress (“Report”), FAA thumbed its nose at that mandate, and chose instead to enumerate the various available metrics, without any attempt at comparative analysis of their efficacy at representing real world noise impacts when compared to Day/Night Average Sound Level (“DNL”), currently required by FAA for analysis of airport noise impacts.

Continue Reading FAA Sidesteps Congressional Mandate to Evaluate Alternative Noise Metrics