I-405/NE 195th Street to SR 527

Location: Bothell, WA

OCI was responsible for TESC Plan Sheets and TESC Plan Narrative to add one auxiliary lane on northbound I-405 from NE 195th Street to SR 527. The project also included improvement to storm drainage resulting from the road widening exercise. OCI utilized MGSFlood to size temporary sediment ponds and designed other TESC BMPs to help prevent, control, and handle sediment from exiting the work zone and entering the existing storm drainage system and waters of the State. OCI regularly attended Task Force meetings as required, assisted in the design of an asphalt grind plane, and reviewed spread calculations.

Transportation Drainage

Service Details >>

Services List
  • Stormwater management and design
  • Stormwater detention, infiltration, and treatment design
  • Hydrologic and hydraulic modeling
  • Stormwater Pollution Prevention Plan (SWPPP) and Narrative
  • Temporary Erosion and Sediment Control (TESC) Plans
  • Green Streets and on-site stormwater management approaches
  • Bridge Scour Analysis
  • Highway Runoff Dilution and Loading Stormwater (HI-RUN) Model
  • Culvert analysis and design
Service Contact
Laurie Thomsen, PE
Vice President / Principal

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