The study investigated sound levels associated with the then-proposed 20,000-seat White River Amphitheater (Muckleshoot Amphitheater), located on State Route 164 approximately 7 miles southeast of the City of Auburn in King County, Washington. A total of four alternatives were evaluated for noise impacts, including two alternatives at the proposed site, a “no action” alternative, and one alternative at a gravel quarry site on State Route 164 near Auburn, Washington. The report presented existing noise levels measured in the vicinity of the sites, noise emission characteristics of the site operations (including on-site and off-site traffic), and predicted sound levels at noise-sensitive receivers in the area surrounding the sites.

This was a comprehensive, detailed study of eight schools within the Highline School District to determine the adequacy of sound isolation provided by the buildings in an environment of high noise levels from commercial aircraft departures and arrivals. Acoustical properties were analyzed on a classroom-by-classroom basis to determine the exact source of deficiencies and define the nature and extent of mitigation required to meet appropriate acoustical design criteria.

The Central Link Light Rail Corridor is that part of the Tacoma - Everett rapid transit plan which includes expanded use of existing rail from Seatac to the northern edge of Seattle. In several alternatives it would be necessary to modify existing streets such that the roadway edge would be moved closer to commercial buildings and residences. BRC reviewed the Draft and Final EIS for the Seattle Department of Planning and Development to determine the adequacy of the noise and vibration impact assessment, including impacts from trains and traffic revisions, in various alternatives.

Click on the following subjects to learn more about environmental noise and how it can be controlled.

Noise Descriptors | Noise Studies and Limits | Environmental Noise Guidelines | Measurements and Predictions | Putting It Together