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About Us
SDA is a civil engineering consulting firm located in Washington. It is guided by three licensed professional engineers with over 50 years of combined experience. In addition to providing civil engineering services, SDA specializes in project planning, project management and surveying for a wide range of project types and clients. Areas of expertise include transportation, public works, commercial, retail, residential, multi-family, industrial, mining operations, and design-build projects. We understand the importance of client service, communication, and being an advocate for our clients and their projects.
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View Portfolio
Services
Project Types
Client List
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- Project management and scheduling
- Site planning and master plan support
- Comprehensive infrastructure design for development
- Environmental impact mitigation
- Sustainable development
- Land use, development, and construction permit support
- Earthwork and grading
- Storm water management systems
- Feasibility analysis
- Cost estimating
- Design-build pursuits
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- Public Parks and Pedestrian Facilities
- Master Planned Subdivisions
- Custom Homes
- Shopping centers
- Highway Expansions
- Public Utilities
- Regional Stormwater Facilities
- Master Planned Corporate Campuses
- High-rise apartments/multi-family residences
- Medical office buildings
- Public Roadways
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- Atkinson Construction
- Camwest Development
- City of Sammamish
- City of Duvall
- DR Horton
- Frontier Communications
- Callison Architects
- City of Bothell
- City of Bellevue
- Collins Woerman
- Fourfold Architecture
- Sellen Construction
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