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Ms. Rachel Juba May 4, 2022 Page 2 the proposed development reroute this drainage through their connection to the 10"trunk line and abandon the existing connection and pipe. 10. The applicant will need to provide an entrance and utility stubs extending south from Street AA/ 159t" Street for an access road on the west side of the development to serve several lots on the east side of Highway 61/Forest Boulevard in the future. 11. Applicant will need to coordinate with and get agreements for all encroachments and work within the large Xcel Energy easement through the site Stormwater Management/Wetlands 12. The site is proposing water quality requirements primarily through water reuse for onsite irrigation. The remaining water quality required will be provided by the stormwater ponds onsite. 13. The site is meeting rate control requirements through the stormwater ponds onsite. 14. Additional permitting with both RCWD and DNR Floodplain/FEMA will be required for the culvert crossing in the ditch. a. While it is not a public ditch, the private ditch is considered a Regional Conveyance System under RCWD's definitions and will requires a Rule G permit administered by RCW D. b. Proposed fill within the floodplain requires additional permitting with the DNR Floodplain/FEMA. 15. While the information previously reviewed confirms the viability of the stormwater reuse system, additional detail on the irrigation system is needed for review. Details on where the pump will be placed, where the intake pipe will be laid and at what elevation, in addition to the location of the main line for irrigation should all be provided as the project moves forward. 16. Additional detailed redline drainage comments have been provided to the applicant and will need to be addressed prior to the issuance of the stormwater permit. 17. The boundary for the wetland, that is part of Outlot E adjacent to lots 6 and 7, does not appear to be represented correctly based on the approved wetland boundary. 18. Applicant to clarify whether proposing a boardwalk to cross the wetland in outlot E in the northeast portion of the project area. 19. Applicant to clarify how is they are proposing to construct the north-south trail corridor 20. The applicant will need to address potential draining of wetland adjacent to the deep stormwater ponds. 21. The applicant will need to confirm that these wetlands are not US army corps jurisdictional. 22. Based on the proposed plans, the applicant will need to seek approval for sequencing, sequencing flexibility(if they can't meet sequencing), and wetland replacement. 23. Applicant will need to provide vehicle access routes to each outlot for future maintenance. Thank you for the opportunity to provide comments on this project. If you have any questions, please do not hesitate to contact me at 651-286-8463. Sincerely, WSB Nick Gui liams, PE Senior Project Manager cc: Scott Anderson, Public Works Director(email only) Liz Finnegan, Senior Engineering Technician (email only) S:\Users\R_Juba\DEVELOPMENT PROJECTS\The Shores of Oneka Lake\Engineers Memo Shores of Oneka Lake Pre Plat-PUD - 20220504.docx