SBSA's efforts to replace aging infrastructure brings with it construction nuisances that could impact nearby neighbors and businesses. SBSA takes its responsibilities to mitigate potentially negative impacts and, as such, has been working diligently to address possible noise impacts from its construction.
Consequently SBSA’s contractor has installed a 16-foot tall noise barrier at the project boundary near the U.S. Fish & Wildlife Service parking lot once the stationary equipment for micro-tunneling is installed in late September. The noise barrier extends from the intersection of Bair Island Road and Uccelli Boulevard along the current temporary roadway to the parking lot entrance.
Additionally, the SBSA project team is exploring the possible opportunity of installing sound attenuating blankets on the stationary equipment. Lastly, the team is working closely with the contractor to explore how re-positioning of equipment could redirect the more noise emitting equipment away from current residents, prior to installation in late September.
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SBSA sound consultant Illingworth & Rodkin, Inc. took sound readings and surveyed the noise levels from the SBSA site and surrounding areas on August 21 (labeled as ST-1 through ST-5 on the graphic shown below).
The noise recorded at the SBSA construction site was well below the Redwood City noise ordinance of 110 dBA. The maximum reading recorded at the nearest residence to the north, approximately 120 feet from the nearest heavy construction equipment, was 74 dBA. The consultant also observed sounds being emitted from other construction sites in the area.
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On site SBSA construction inspectors are present prior to construction each day to ensure that work does not start before 7 a.m. Because they have been present in these early hours they have observed construction equipment starting work prior to the 7 a.m. start time but not from the SBSA site. SBSA takes its commitment to address noise issues seriously and as such is interested in not incurring responsibility for noise generated from other construction sites.
SBSA has taken a "good neighbor" approach philosophy from the very beginning of its effort to replace needed infrastructure. This philosophy is first introduced when creating construction contracts and followed through during the construction period. SBSA understands and takes its responsibilities seriously and will continue to do everything that it can to reasonably address neighbor concerns relating to noise.
Actions are being taken and will continue to be taken to meet the "good neighbor" approach philosophy.
