I-405 Bellevue Braids Design Build, WSDOT

SDA was the Stormwater Design Lead, Utility Lead, TESC Lead, and Stream Mitigation
Lead for this complex design-build project and was responsible for the design and
coordination associated with approximately $8 million of the $106 million project budget


SR 530, Oso, Washington

SDA was the drainage and TESC lead for the design-build team that reconstructed this portion of the highway. The reconstruction required the construction of 6 fish passable culverts, treatment systems, conveyance systems and subsurface drainage. SDA was part a design build team that delivered on an aggressive schedule which restored transportation on this corridor 3 months before the contract required and only 3 months after the slide.