Project Description: This Project will provide water quality treatment for street runoff by retrofitting the roadsides with bioretention treatment systems. This Project consists of the following elements of Work including but not limited to: construction stormwater erosion control (submittal, implementation, and maintenance of the Construction Stormwater Pollution Prevention plans (CSECP/SWPPP, TVSPP, SP, & TDP)); health and safety plan; clearing and grubbing; demolition and removal of existing surface pavement, sidewalks, and curbs; excavation; temporary traffic control plan and implementation, including flagging; site preparation and staging; survey; removal and abandoning existing drainage structures and piping; dewatering; temporary stormwater bypass; protection, relocation, and/or adjustments of existing utilities, including water and gas services; reconnection to the existing drainage system; installation of new surface drainage systems, including storm drainage piping, drainage structures, bioretention cells, and modular structural soil cell tree facilities; flow testing; assist SPU crews with water service and meter box relocations/adjustment; television inspections; and final site restoration, including surface paving, pavement markings, sidewalks, curbs, driveway, curb ramps, final planting, and landscape construction. Engineer's Estimate: $1,178,000.00 Project Location: This Project is located in the City of Seattle (COS) on SW Holden St between 16th Ave SW and 18th Ave SW.

The City of Seattle is accepting electronic bid submissions. Bidders shall create a FREE account with OpenGov Procurement by signing up at https://procurement.opengov.com/signup. Once you have completed account registration, browse back to this page, click on "Draft Response", and follow the instructions to submit the electronic bid.

Release Project Date:April 1, 2026Pre-Bid Site Meeting #1 (Mandatory for Bidders to attend at least one of the two pre-bid site meetings):April 7, 2026, 10:00amIntersection of SW Holden St and 16th Ave SWPre-Bid Site Meeting #2 (Mandatory for Bidders to attend at least one of the two pre-bid site meetings):April 9, 2026, 10:00amIntersection of SW Holden St and 16th Ave SWQuestion Submission Deadline:April 16, 2026, 5:00pmBid Open Date:April 22, 2026, 2:00pm

Please see the Attachments section for specifications and attachments.

Kai FanSenior Civil Engineer700 5th Ave, Suite 4900Seattle, WA 98124Email: kai.fan@seattle.govPhone: (206) 684-5942

Gina OwensSr. Construction Contracts Specialist700 5th Avenue, Suite 4350Seattle, WA 98124Email: gina.owens@seattle.govPhone: (206) 684-7251