Civil Engineering
At Red Barn, we are design-focused and have our system set up that controls both the survey collection and the geotechnical requirements to provide full-service civil engineering design services to support any type of building, residence, roadway, plat, or utility project where the earth is being moved. Our services include the following general areas:
- Erosion & Sediment Control
- Stormwater Design & Drainage Reports
- Foundation Drainage Design
- Water Services
- Sanitary Sewer
- Dry Utility Coordination
- Pavement Design (Asphalt & Concrete Jointing Plans)
- Grading Plan (coordination with Architect and Landscape Architect)
- 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

Zero-Lot Line

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

Bioretention

Storm Structures

Infiltration

Box Culvert

Dispersion

Conveyance
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 – Domestic and Fire 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
- SCL/PSE
Pavement Design
Red Barn uses coordination with geotechnical firms to review design sections for:
- Pervious concrete pavement
- Pervious asphalt
- Pavers
- Asphalt
- Cement Concrete
- Gravel
Grading
Grading is the coordination between architect and civil designer. The following are completed as part of the Red Barn grading plans:
- 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

ADA Ramps

Site Excavation/Shoring

Site Mass Grading

Street Grading

Gravel Road

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