Civil Engineering

At Red Barn, our design system controls both survey collection and geotechnical requirements, providing civil engineering services to support any type of building, residence, roadway, plat, or utility project. Our services include the following general areas:

  • Erosion & Sediment Control
  • Stormwater Design
  • Foundation Drainage Design
  • Water Services
  • Sanitary Sewer
  • Dry Utility Coordination
  • Pavement Design
  • Grading Plan
  • Seattle-Area Projects

    South Puget Sound

    Erosion & Sediment Control

  • Erosion and Sediment Control (ESC)/Construction and Sediment Control (CSC)
  • King County Industrial Waste (KCIW) Permit
  • Ecology’s Construction General Permit
  • Construction Stormwater Pollution Prevention Plan (SWPPP)
  • Dewatering Permits
  • Discharge to Sanitary Sewer Permits
  • Certified Erosion and Sediment Control Lead (CESCL)
  • pH and Turbidity Monitoring
  • Turf Reinforced Matting
  • Post Construction Soil Amendments
  • Turf Reinforced Matting

    Zero-Lot Line

    Erosion and Sediment Control

    High Groundwater

    Stormwater Design

  • Provide jurisdiction specific green stormwater infrastructure (GSI)/low impact development (LID)
  • Rain gardens
  • Non-infiltrating bioretention
  • Infiltrating bioretention (w/ Red Barn’s Geotech Group)
  • Infiltration trenches or drywells
  • Dispersion
  • Pervious pavement surface and facility
  • Water quality treatment
  • Bioswales & biofiltration
  • Combined Sewer Overflow (CSO) reduction planning and design
  • Industrial stormwater design (removal of dissolved zinc/copper per NPDES compliance standards)
  • Outfall design and permitting
  • Box culvert design
  • Plan Diagram


    Drainage Piping with Ladder

    Storm Structures

    Measuring Drainage Hole


    Engineers Placing Cement Drainage Section

    Box Culvert

    Drainage Ditch with Piping


    Cement Block with Piping


    Foundation Drainage Design

  • Shoring wall drainage
  • Pump performance specifications
  • Coordination with geotechnical engineer/environmental engineer for discharge location of footing drains
  • Footing drain design including bentonite panel/Mira drain and coordination with the geotechnical engineer and envelope consultant for the capillary break
  • Water Services

  • Water main extensions
  • Domestic meter and service line
  • Fire services (hydrants, Post Indicator Valve (PIV), Fire Department Connections (FDC))
  • Irrigation meter and service line
  • Water system analysis (City-wide modeling for fire flow analysis and system capacity)
  • On-call with MEP firm to obtain meters sizing
  • Sanitary Sewer

  • Sanitary sewer main extensions
  • Force main design
  • Trenchless/horizontal drilling
  • Grinder pump design
  • On-call with MEP firm to provide sanitary sewer sizes
  • Partner with sewer CCTV specialists to review side sewers
  • Dry Utility Coordination

  • Comcast
  • CenturyLink
  • Frontier
  • Pavement Design

  • Pervious concrete pavement
  • Pervious asphalt
  • Pavers
  • Asphalt
  • Cement Concrete
  • Gravel
  • Grading Plan

  • ADA design & review
  • Door elevations
  • Walkway grades
  • Window well grades/drainage
  • Flat area hardscape drainage (trench drains & runnels)
  • Mass grading
  • Earthwork quantity takeoffs
  • Road and driveway grading using Civil 3D
  • Grading Design

    ADA Ramps

    Mass grading

    Site Mass Grading

    Gravel Road

    Gravel Road

    Digital Grading Plan

    Earthwork Calc.

    Grading Project

    Site Excavation/Shoring

    Grading Diagram

    Street Grading

    Contact us for more information on our civil engineering projects. We serve clients in Seattle, Washington, and throughout the state.