Transportation Drainage


I-5 – SR 510 Diverging Diamond Interchange

8/22/18

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
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NE 192nd Street Culvert Replacement

12/15/17

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,
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Golden Gardens Drainage and Stairway Renovation

3/23/17

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
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SPU Modeling On-Call

12/13/16

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
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NE Inglewood Hill Road Improvements Project

12/13/16

Location: Sammamish, WA Over 5,500 linear feet of new stormwater conveyance and water quality treatment of approximately 3.3 acres of existing pollution generating roadways was constructed in the Inglewood neighborhood to resolve the existing drainage problems and complete the missing link in multi-modal corridor improvements connecting downtown Sammamish to Lake Sammamish. Osborn Consulting led the design
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