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Biological Assessment WSP USA, 30902211.000
City of Renton, May Creek Trail South Soft Surface Trail and Bridge Project September 2024
Renton, Washington Page 8 of 29
the proposed project. The action area (Figure 2) has been established based on the following: • The project footprint. • The extent of temporarily elevated terrestrial noise levels associated with construction activities. • The extent of temporary effects to water quality during construction. 2.4.1 Project Footprint The action area includes the overall footprint of the proposed action, which includes the locations of the trail alignment and bridge as well as the grading activities associated with the trail and the excavation and fill required for the bridge abutments. The action area also includes the locations of equipment and material staging, which will occur in an upland portion of the site.
Figure 2 Project Action Area
2.4.2 Temporarily Elevated Terrestrial Noise
Baseline and construction-related terrestrial noise levels were inferred using a
technique recommended by WSDOT (WSDOT, 2018). That guidance includes
information regarding average noise levels associated with construction equipment
and noise attenuation data from the Federal Transit Administration’s (FTA) Transit
Noise and Vibration Impact Assessment Guidance (FTA, 2006).