3710 TULALIP AVE SEPA 016 - 015 Land Use Decision Documents 2025-05-12

3. Address and phone number of applicant and contact person:3200 Cedar St.Everett,WA 98201425- 257-8949 4. Date checklist prepared: 10/14/2016 5. Agency requesting checklist:City of Everett Planning Dept. 6. Proposed timing or schedule (including phasing,if applicable): Construction from spring 2017 to spring 2018 7. Do you have any plans for future additions,expansion, or further activity related to or connected with this proposal? If yes,explain. No 8. List any environmental information you know about that has been prepared,or will be prepared, directly related to this proposal.An Environmental checklist 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes,explain.No 10. List any government approvals or permits that will be needed for your proposal, if known.SEPA review 11. Give brief, complete description of your proposal,including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. The Hayes Street Regulator and CSO Control Project is located in the northeast area of the City where several large size sewer mains converge carrying flow originating from a majority of north Everett. The flow continues through three siphon pipes extended beneath the Snohomish River and to the City's wastewater treatment plant.The project area is generally comprised of public right-of-way of Hayes Street,an unnamed alleyway connected to Hayes Street and a City owned site called Siphon Headworks. The area is primarily light industrial,with a few commercial parcels.The existing sewer infrastructure in the area is a combined sewer system, handling sanitary and stormwater flows in the same pipe network. The City of Everett 2014 Comprehensive Sewer Plan defines and prioritizes capital improvements that would achieve minimum 25-year Level of Service (LOS)for the sewer collection system and a reduction in Combined Sewer Overflow(CSO)events to one per year on a 20-year rolling average period per outfall site to comply with Washington State law(WAC 173-245). CSOs consist of a mixture of sewage and stormwater that are temporarily unable to be conveyed to the City's treatment plant and are discharged to the Snohomish River. The Hayes Street project primarily addresses CSO discharges for three Snohomish River Outfalls at this location that have a history of non-compliance.The project is intended to increase existing combined, sanitary,and storm sewer network performance to reduce CSOs to the compliance goal limit of one CSO event per year on average.New pipes and regulator structures along with additional improvements and modifications to existing siphon headworks facility are proposed. By constructing new regulating structures and combined sewer pipes,the capacity of the existing siphon system will increase,decreasing 2930 Wetmore Avenue,Suite 8-A Everett,WA 98201 0 47.5.257.8731 w F 42.5.257,3742 0 www.everettwa.org ® Updated 2009 //a