Sewer Relining Program


OCI is leading Seattle Public Utilities’ (SPU) Sewer Relining Program to provide bid documents and construction assistance for using CIPP on over 200 drainage, sanitary sewer, and combined sewer pipes. The program’s primary objective is to renew the wastewater pipe system as well as support NPDES and Consent Decree compliance by reducing sewer overflows (SSO),
( Read more... )

I-5 – SR 510 Diverging Diamond Interchange


Construction Bid Opening Date: August 22, 2018 OCI designed the stormwater and temporary sediment and erosion control elements for this WSDOT Design-Bid-Build project located at the I-5/SR 510 (Marvin Road) interchange in the City of Lacey. The project will upgrade the existing interchange to a Diverging Diamond Interchange (DDI) and add a southbound frontage road
( Read more... )

NE 192nd Street Culvert Replacement


OCI completed the alternatives analysis design and construction documents (PS&E) for a 60-foot long 12-foot by 7-foot bottomless precast culvert for Little Swamp Creek at the NE 192nd Street crossing in Kenmore, WA. The culvert will relieve persistent flooding and meets WDFW fish passage standards. The project includes: fish passable culvert design, XPSWMM H&H analysis,
( Read more... )

Golden Gardens Drainage and Stairway Renovation


Location: Seattle, WA The Golden Gardens Drainage and Stairway Renovation project replaced popular yet unsafe and failing stairs with a new ADA-complaint 6 ft. wide concrete stairway in Golden Gardens Park, located along the Puget Sound in Ballard. Developed in the early 20th century, the park has since become a Seattle landmark, known for its historic
( Read more... )

SPU Modeling On-Call


Location: Seattle, WA OCI is a key subconsultant on this modeling on-call contract led by Aqualyze. OCI and Aqualyze team members are working together to update and calibrate system wide sewer models as well as drainage basin models to provide SPU with a much needed tool to address and analyze system capacity issues in support of
( Read more... )