Phased South Park Drainage Improvements Project

Project Description:

Seattle Public Utilities (SPU) is seeking a consultant team to complete design and construction support of drainage improvements of the South Park Drainage Improvements phase 2 project. The South Park Lower Industrial sub-basin has a long history of flooding, up to multiple times per year, from stormwater, overland flows, and lack of adequate drainage infrastructure. Additionally, streets in this industrial area are in poor condition. The City of Seattle has undertaken a major program to construct drainage and roadway improvements, a stormwater pump station and is in options analysis for a future water quality facility.

Prior drainage and roadway improvements in the Lower Industrial Area include the multi-modal West Duwamish Trail along S Portland St between 2nd Ave S and 8th Ave S, as well as the South Park Drainage and Roadway Improvements Phase I Project, which improved drainage and right-of-way mobility along 10 blocks. The City is now moving to design the next tier of priority investments. This project is anticipated to improve drainage and mobility along roughly 6 blocks. This will be a phased contract, with 2 to 3 phases:

• Sea Level Rise Adaptation Feasibility and Scoping (3-month duration)
• Design (2-year duration) o Engineering Services During Construction (1.5-year duration)
• Community outreach and engagement during design and construction (3.5-year duration)

The total estimated contract amount is $4.5M and the total project budget estimate is $26M. SPU intends to execute a single, 5-year phased consultant services contract, with an option to extend additional years. Work Assignments will be prepared and executed for each phase.

This contract is expected to be funded in part by the Environmental Protection Agency (EPA). The EPA nor any of its departments or employees are, or shall be, a party to any contract or any subcontract resulting from this solicitation.