2025/06/04 Council Agenda Packet

Exhibit A (Scope of Work) ▪ Discussing project conflicts that arise, labor resourcing ▪ Informal internal communications, progress check-ins, scheduling deliverables TASK 1.2 DELIVERABLES • Meeting Minutes • Responses to City review comments • Emails 2.0 Site Investigation 2.1 Desktop Review The Consultant will gather additional existing available information from the City, County or State Agencies on Pigeon Creek 2, flooding, landslides within the basin. This includes past maintenance records, drainage complaints, photographs, stormwater infrastructure drawings, as -builts or surveys. 2.2 Site Reconnaissance/Geomorphic Survey The team will visit the project site with the City Project Manager to inspect the existing conditions. The project survey basemap will be field verified for utility locations/conflicts, existing critical infrastructure, and access features. The ditch and culvert stormwater conveyance adjacent to Olympic Blvd will be evaluated to understand current conditions safety concerns. As part of this task, Otak’s geomorphologist and hydraulics engineer will assess the stream reach from Mukilteo Blvd to the Puget Sound outfall to assess changes in the stream channel and work performed by the City or others in the corridor, and new sources of sediment supply such as shallow slope failures or nick points forming in the channel, and where logs are holding sediment and debris. Otak’s geomorphologist and hydraulic engineer will also hand measure cross sections every 100 feet beyond the survey profile between Mukilteo Boulevard and the Port Gardner Bay outfall and integrate with the LIDAR map. TASK 2 ASSUMPTIONS ▪ City provides available past maintenance records, drainage complaints, photographs, and stormwater infrastructure information. ▪ The City will coordinate/obtain right of entry – contacting landowners and securing rights. ▪ The City will provide access to Howarth Park Property. ▪ Up to four Consultant team members will visit the project site with City staff, including the project manager, Consultant will contact outside agencies for relevant information. ▪ The City will advise if any additional basin planning work has been completed since Otak’s study ▪ Otak’s stormwater staff will coordinate with survey staff so that site reconnaissance will not require substantial vegetation removal ▪ We assume this reconnaissance will span approximately 3000 LF ▪ Site reconnaissance will include ArcGIS to show spatial ▪ The Desktop Review does not include preparing a bibliography/reviewed material summary. Information taken from the reviewed data will be incorporated into the Alternatives Analysis Technical Memorandum, as part of Task 5.