400 RIVERSIDE RD SEPA 016 - 039 - RIVERSIDE BUSINESS PARK Land Use Decision Documents 2025-04-14

CHAPTER 7. PROJECT EFFECTS ON ESA-LISTED SPECIES An analysis of project affects to ESA-listed species that have potential for presence in the vicinity is detailed below. The ESA-listed species assessed include steelhead trout, Chinook salmon, Chum salmon,Sockeye salmon,Coho salmon,and Bull Trout. Potential project impacts are evaluated based upon specific habitat components that would be altered or removed and the degree to which such alteration may occur;the abundance and distribution of the habitat components; the distribution and population levels of the species (if known); the possibility of direct or indirect impacts to the species and/or habitat, and the potential to mitigate for adverse effects. 7.1 Direct and Indirect Effects ' Potential effects from the project upon ESA-listed species identified in Chapter 6 primarily include construction noise and possible short term increases in turbidity, which will be mitigated with best management practices.Long term effects include reduction of turbidity entering the Snohomish River ' due to the stormwater treatment plans included in the project. Currently, stormwater is running off compacted urban soils with little to no infiltration time provided by the highly-compacted soils. This project will improve conditions long term. 7.2 Short-Term Effects 7.2.1 Sound Impacts to the local environment from project noise may occur within an 81-foot terrestrial radius of the Project Area, as the estimated sound level from the use of project machinery is higher than the estimated ambient sound level in the commercial urban area along Interstate 5. Short-term effects due to project noise will likely be minor due to the high ambient noise level produced by the traffic of Interstate 5, which is 79.8 dBA. The maximum noise level of the project is 84 dBA, which will ' attenuate within an 81-foot radius. Noise from project activities can adversely affect wildlife with various behavioral and/or health-related consequences (WSDOT, 2010), however, there are no terrestrial species within this radius. Project activities will occur no closer than 50 feet from the Snohomish River and noise will attenuate quickly through water. Therefore, sound effects are expected to be minimal to non-existent, particularly since ESA listed fish species are not likely to be utilizing the site within the action area. i7.2.2 Increased Turbidity The project's limited potential for construction runoff will be mitigated by best management practices and the installation of stormwater treatment areas. The Port of Everett will be undertaking the restoration of the shoreline and the buffer area as part of the development, therefore, increases in turbidity are not expected and are not considered a significant project impact. ' 7.3 Long-Term Effects ' Long-term effects of the project upon riparian habitat and species are extremely minimal due to the lack of existing habitat and project actions taking place on existing urban compacted soils, which provide minimal functions and values. The project includes plans to direct stormwater runoff into constructed stormwater treatment facilities and a restored shoreline buffer area. Long-term effects Soundview Consultants LLC December 8,2016 1413.0003 Riverside Business Park—FEMA ESA Habitat Assessment Report Page 18