Aurora Airport Hangar

200,000 SF Project Size

6.41 Acres Site Development

2 Aircraft Hangars

Project Overview

Columbia Engineering Group provided civil engineering for an aviation development at Aurora Airport in Marion County, Oregon. The project developed approximately 6.41 acres and included two aircraft hangars.

The aviation facility totals approximately 200,000 square feet. In addition, the project included office space, taxiway access, site utilities, pavement, grading, and stormwater infrastructure.

Civil Design for Aviation Operations

The site required careful coordination between aircraft access, grading, drainage, utilities, and pavement. Therefore, CEG planned the civil infrastructure around the daily needs of an active airport environment.

The entire site also required a slope of 1% or less. As a result, CEG coordinated grading with a shallow drainage system and controlled stormwater detention.

Civil Engineering Scope of Work

CEG provided civil design for the site, airfield access, utilities, stormwater systems, and supporting aviation infrastructure.

Site Grading

CEG graded the 6.41-acre site to maintain slopes of 1% or less. This approach supported aircraft movement, drainage, and overall site function.

Taxiway & Airfield Access

The project included a taxiway and adjoining airport surfaces. CEG coordinated these areas with the broader site layout and aviation access needs.

Stormwater Management

Shallow trench drains collect stormwater across the site. The system then directs runoff to StormBrix detention before pumping it to a bioswale for treatment.

Underground Utilities

CEG coordinated power, domestic water, sanitary sewer, natural gas, and stormwater utilities. The sanitary system also uses an existing septic sand filter with an added holding tank.

Aviation Pavement

CEG designed pavement and site surfaces to support aircraft access and aviation operations. The design also coordinated these areas with the hangars and surrounding airport infrastructure.

Agency Coordination

CEG coordinated the project with Marion County, the Oregon Department of Aviation, and the Federal Aviation Administration to address applicable development requirements.

Project Outcome

The Aurora Airport project created the civil infrastructure needed to support a major new aviation facility in Marion County. CEG coordinated grading, aircraft access, pavement, utilities, and stormwater systems across the 6.41-acre site.

In addition, the design connected the new hangars with existing airport infrastructure and utility systems. The stormwater strategy also combined shallow drainage, detention, and bioswale treatment.

As a result, the site supports aviation operations while meeting the infrastructure needs of a large airport development.

What Made This Project Stand Out

Large Aviation Development

The project combines two aircraft hangars and supporting infrastructure within an approximately 200,000 square foot development.

Precision Site Grading

CEG maintained site slopes of 1% or less to support aircraft access, drainage, and airport operations.

Integrated Stormwater Strategy

Shallow trench drains, StormBrix detention, pumping, and bioswale treatment work together as one stormwater system.

Multi-Agency Aviation Coordination

CEG coordinated with Marion County, the Oregon Department of Aviation, and the FAA throughout the project.

3 Lot Subdivision

0.64 Acres Site Development

3 Residential Lots

Private Driveway Access

Project Overview

Columbia Engineering Group provided civil engineering for a three-lot residential subdivision in Washougal, Washington. The project developed a 0.64-acre property into three lots for new single-family homes.

CEG designed the private driveway, grading, utilities, stormwater systems, and frontage improvements. In addition, the team prepared construction documents and coordinated permitting with local authorities.

Coordinated Residential Site Development

The compact site required careful coordination between access, grading, utilities, and drainage. Therefore, CEG planned each system around the needs of all three lots.

The project also required public-facing improvements along the property frontage. As a result, the civil design addressed both private development and surrounding infrastructure.

Civil Engineering Scope of Work

CEG provided civil engineering from site planning through permit-ready construction documents.

Three-Lot Short Plat

CEG planned the 0.64-acre property as a three-lot residential short plat. The civil design supported future single-family development on each lot.

Driveway & Frontage Improvements

CEG designed a private driveway to serve all three lots. The project also included frontage improvements and sidewalk extensions.

Grading & Retaining Walls

CEG designed the site grading and retaining walls to support development. These improvements also addressed drainage and site construction needs.

Utilities & Stormwater

The civil scope included domestic water, sanitary sewer, stormwater systems, street illumination, and utility service for the residential lots.

Construction Documents & Permitting

CEG prepared the construction documents for the subdivision. In addition, the team coordinated permitting with local authorities to support project approval.

Project Outcome

The project created a three-lot residential short plat on a compact 0.64-acre site. CEG coordinated the civil infrastructure needed to support access, utilities, drainage, and future home construction.

In addition, frontage improvements and sidewalk extensions connected the private development with the surrounding public infrastructure. CEG also prepared the documents needed for permitting and construction.

As a result, the project received a coordinated civil design that addressed both site development and approval requirements.

What Made This Project Stand Out

Efficient Three-Lot Site Design

CEG coordinated the infrastructure needed to serve three residential lots within a compact 0.64-acre property.

Shared Private Access

A private driveway provides access to all three lots while supporting an efficient subdivision layout.

Complete Site Infrastructure

The design coordinated grading, retaining walls, water, sewer, stormwater, street illumination, and utility service.

Permit-Ready Documentation

CEG prepared construction documents and coordinated with local authorities throughout the permitting process.

Grace Slavic Baptist Church

38,000 SF Total Facility

16,000 SF Sanctuary

22,000 SF School Wing

Project Overview

Columbia Engineering Group is providing full-scope architectural and engineering services for Grace Slavic Baptist Church in Spokane, Washington. The project includes a new 38,000 square foot, two-story wood-frame worship and education facility.

The building combines a 16,000 square foot sanctuary with a 22,000 square foot school wing. In addition, the education areas include classrooms, a dining hall, and a full commercial kitchen.

Integrated Worship and Education Design

The facility combines Assembly and Education occupancies within one building. Therefore, the design requires close coordination between architecture, building systems, life safety, site development, and utilities.

CEG is delivering the project through an integrated design process. As a result, the major disciplines remain coordinated from concept through construction documents.

Architecture and Engineering Scope of Work

CEG is providing architectural services along with civil, structural, mechanical, electrical, plumbing, and fire protection engineering.

Worship & Education Facility

The two-story wood-frame building combines a 16,000 square foot sanctuary with a 22,000 square foot school wing.

Education & Support Spaces

The school wing includes classrooms, a dining hall, and a full commercial kitchen to support education and congregational activities.

Life Safety & Fire Protection

The facility is being designed as a fully sprinklered building with comprehensive life safety systems for its Assembly and Education occupancies.

Site Development & Utilities

CEG is providing full site development design, supporting infrastructure, and utility coordination for the new church campus.

BIM Coordination

CEG is developing the project in a coordinated BIM environment to reduce design conflicts and improve construction efficiency.

Permitting Leadership

CEG is leading the permitting process to support the project schedule and maintain alignment with local agency requirements.

Project Outcome

Grace Slavic Baptist Church is being developed as a coordinated worship and education campus designed to serve a growing congregation.

CEG is integrating architecture, multidisciplinary engineering, site infrastructure, life safety systems, BIM coordination, and permitting. As a result, the project benefits from a unified design approach from concept through construction documents.

What Made This Project Stand Out

38,000 SF Worship and Education Campus

The facility combines a 16,000 square foot sanctuary with a 22,000 square foot school wing.

Full-Scope Integrated Design

CEG is coordinating architecture with civil, structural, mechanical, electrical, plumbing, and fire protection engineering.

Coordinated BIM Environment

BIM coordination supports consistency across disciplines while reducing design conflicts and improving construction efficiency.

Site and Permitting Leadership

CEG is coordinating site development, supporting infrastructure, utilities, and the project permitting process.

Nomad Subdivision

1.9 Acres Site Development

7 Private Lots

Public Road Frontage Improvement

Project Overview

Columbia Engineering Group provided civil engineering for Nomad Subdivision in Washougal, Washington. The project involved development of a 1.9-acre property and supported the creation of seven private lots.

CEG also designed a half-width public road improvement along one edge of the property. In addition, the project included utility and stormwater infrastructure to support the residential development.

Coordinated Residential Site Development

The project required roadway, utility, and stormwater improvements within a relatively compact property. Therefore, CEG coordinated the civil infrastructure around both site access and long-term functionality.

The design also focused on reducing future maintenance needs. As a result, the stormwater system does not require HOA oversight.

Civil Engineering Scope of Work

CEG provided civil engineering for the residential site and its supporting infrastructure.

Residential Lot Development

The project supported development of seven private lots within the 1.9-acre property.

Public Road Improvement

CEG designed a half-width public road improvement along one edge of the property.

Utility Easement

The design incorporated a utility easement that provides power, water, and sanitary sewer service to the development.

Stormwater Management

CEG designed a low-maintenance stormwater system that does not require HOA oversight.

Project Outcome

Nomad Subdivision combines residential lot development with coordinated roadway, utility, and stormwater infrastructure on a 1.9-acre property in Washougal.

In addition, the low-maintenance stormwater system reduces the need for ongoing shared management. As a result, the development balances practical infrastructure with long-term efficiency.

What Made This Project Stand Out

Seven Private Residential Lots

The project supports seven private lots within a compact 1.9-acre development.

Public Road and Site Infrastructure

CEG coordinated the half-width public road improvement with utility and stormwater infrastructure serving the residential development.

Coordinated Utility Easement

The utility easement provides power, water, and sanitary sewer service to the development.

Low-Maintenance Stormwater Design

The stormwater system is designed to function without requiring HOA oversight for ongoing maintenance.

Modern Apartments

30 Apartment Units

3-Story Residential Building

0.30 Acres Urban Site

Project Overview

Columbia Engineering Group provided civil engineering services for Modern Apartments in Portland, Oregon. The project involved development of a three-story, 30-unit apartment complex on a 0.30-acre site.

CEG supported the project with civil engineering plans for site development, utilities, grading, stormwater, and public frontage work. In addition, the scope required extensive coordination with the Oregon Department of Transportation as part of the overall development process.

Site Development Approach

This project brought multifamily housing onto a compact urban lot. Therefore, the civil design needed to coordinate building support systems, site grading, stormwater performance, and right of way improvements within a limited footprint.

At the same time, the project required public agency coordination beyond the site itself. As a result, CEG helped align the civil scope with ODOT coordination and frontage-related requirements tied to the development.

Engineering Scope of Work

CEG delivered civil engineering services for the apartment development from core site planning through utility and frontage design. Overall, the scope focused on practical site function, stormwater management, and coordination with public improvements.

📐 Civil Engineering Plans

CEG prepared civil engineering plans to support site development for the three-story, 30-unit apartment project.

🌧️ Erosion and Stormwater Design

The scope included erosion and sediment control plans along with stormwater design to support site performance and permitting.

💧 Utilities

CEG designed water and sewer utility improvements as part of the overall civil scope for the apartment development.

📏 Site Grading

The project included grading design to support site drainage, building placement, and overall development function on the compact lot.

🚧 Right of Way and Frontage Improvements

The civil scope also included right of way dedication and frontage improvements, with extensive coordination involving the Oregon Department of Transportation.

Project Outcome

Modern Apartments brought a 30-unit multifamily development to a 0.30-acre site in Portland, OR. Through coordinated civil engineering, CEG supported the project with plans for utilities, grading, stormwater, erosion control, and frontage improvements.

Just as importantly, CEG helped navigate the public-facing portions of the project through right of way dedication and extensive ODOT coordination. As a result, the civil scope addressed both on-site development needs and the infrastructure requirements tied to the surrounding frontage.

What Made This Project Stand Out

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Compact Urban Multifamily Development

The project supported a three-story, 30-unit apartment complex on a 0.30-acre site, requiring efficient civil coordination within a limited footprint.

✓

Complete Civil Site Scope

CEG provided plans for erosion and sediment control, grading, utilities, stormwater, right of way dedication, and frontage improvements.

🌧️

Stormwater and Utility Coordination

The civil design addressed both water and sewer utilities as well as stormwater performance for the apartment site.

🤝

ODOT Coordination

The project involved extensive coordination with the Oregon Department of Transportation as part of the frontage and right of way work.

Columbia Holdings Building #2

20,000 SF Building Size

1.3 Acres Site Development

6 Engineering Disciplines

Project Overview

Columbia Engineering Group provided civil, structural, mechanical, electrical, plumbing, and fire protection engineering for Columbia Holdings Building #2 in Bush Prairie, Washington. The project included a 20,000 square foot pre-engineered metal building on a 1.3-acre site.

In addition to the building design, CEG supported full site development for the project. That scope included ADA-accessible parking, EV charging, landscape design, and an underground stormwater infiltration gallery. Together, these elements helped support a practical industrial and commercial facility with sustainability-focused features.

Site Development and Permitting

This project required more than building systems design alone. CEG also led entitlement and permitting, which included land use applications, traffic studies, pre-app meetings, utility coordination, and DEQ approvals.

As a result, the project moved forward with coordinated support across both site development and regulatory review. That broader role helped align the building, site, and utility infrastructure from early planning through permitting.

Engineering Scope of Work

CEG delivered a coordinated multidisciplinary scope for the building and site. Overall, the work combined site development, utility infrastructure, fire protection, and core building systems within one integrated design effort.

🏗️ Building Engineering

CEG provided structural, mechanical, electrical, plumbing, and fire protection engineering for the 20,000 square foot pre-engineered metal building.

🌿 Site Development

The site scope included ADA-accessible parking, EV charging, landscape design, and an underground stormwater infiltration gallery.

🔥 Fire Protection Infrastructure

The fire protection scope included a firewater main, hydrants, and FDC infrastructure to support the site and building fire protection needs.

⚡ Sustainability Features

The project included EV charging and landscape and stormwater design elements that supported broader sustainability goals for the site.

📋 Entitlement and Agency Coordination

CEG managed land use applications, traffic studies, pre-app meetings, utility coordination, and DEQ approvals as part of the entitlement and permitting process.

Project Outcome

Columbia Holdings Building #2 combined a new industrial and commercial building with full site development on a 1.3-acre site in Bush Prairie, WA. Through coordinated civil and MEP engineering, CEG helped deliver a project that addressed building systems, site infrastructure, accessibility, and fire protection within one integrated scope.

Just as importantly, CEG led entitlement and permitting for the project. By managing land use, traffic, utility, and DEQ coordination, the team supported a more complete development process from planning through approvals.

What Made This Project Stand Out

🏢

Full Building and Site Coordination

The project combined a 20,000 square foot pre-engineered metal building with full site development on a 1.3-acre property.

✓

Entitlement and Permitting Leadership

CEG led land use applications, traffic studies, pre-app meetings, utility coordination, and DEQ approvals for the project.

🔥

Integrated Fire Protection Infrastructure

The fire protection scope included a firewater main, hydrants, and FDC infrastructure to support the new development.

🌿

Sustainability and Site Features

The site included EV charging, ADA-accessible parking, landscape design, and an underground stormwater infiltration gallery.

Eastern State Hospital Activity Therapy Building

55,000 Square Feet Renovated

3 Stories, Phased by Floor

0 Plan Review Comments

Project Overview

Columbia Engineering Group provided civil, mechanical, electrical, plumbing, and fire protection engineering for the phased renovation of the Eastern State Hospital Activity Therapy Building in Medical Lake, Washington. This 55,000 square foot, three-story healthcare facility remained partially occupied during construction. As a result, the design team developed a floor-by-floor renovation strategy that supported ongoing operations while major building systems were upgraded.

The building supports a broad range of patient programming. Therefore, the project required a multidisciplinary engineering approach. In addition, the design had to balance constructability, life safety, occupant comfort, and long-term performance. Because adjacent floors remained in use, the work also had to support active healthcare operations throughout the renovation.

About the Facility

The Eastern State Hospital Activity Therapy Building plays an important role in daily patient programming on campus. It provides therapeutic, recreational, and support spaces that serve day-to-day operations. The building includes:

Gymnasium and fitness rooms
Bowling alley
Library
Indoor agriculture area
Wood shop
Commercial kitchen and café
Offices and counseling spaces
Conference rooms

Engineering Scope of Work

The project included upgrades across civil, mechanical, electrical, plumbing, and fire protection systems. Together, these improvements support better safety, reliability, and long-term maintainability throughout the facility.

Mechanical / HVAC

The design replaced the HVAC system and added cooling to the building. In addition, the scope relocated two boilers from an adjacent building and supported the infrastructure needed for new equipment yard areas.

Building Automation

The project replaced the building automation system. It also connected the system to the campus-wide BAS network for remote monitoring and centralized management.

Electrical

The electrical scope replaced the main switchboard and all panelboards. It also upgraded building lighting to LED. In addition, the project replaced the generator and provided backup power for the full building.

Plumbing

The design included a new domestic water service. As a result, the updated building systems could better support long-term facility needs.

Fire Protection

The project added a new fire sprinkler system throughout the building. It also upgraded the fire alarm system and tied it into campus-wide monitoring.

Civil

The civil scope designed two equipment yards with access roads. These areas support relocated and new mechanical equipment associated with the renovation.

Project Outcome

This project shows Columbia Engineering Group’s ability to deliver coordinated engineering for complex occupied healthcare renovations. The project moved through City of Medical Lake and Department of Health plan review without a single plan review comment. In addition, Labor & Industries Electrical Plan Review required only a minor clarification before approval.

At the same time, the project combined phased renovation planning with campus-wide system integration. It also included backup power upgrades, fire protection improvements, HVAC modernization, and utility infrastructure design. As a result, the work improved safety, reliability, monitoring, and long-term operational performance for an active healthcare facility.

What Made This Project Stand Out

Occupied, Phased Renovation

The project supported a floor-by-floor construction sequence while adjacent floors remained occupied. Because of that approach, the building could continue operating throughout the renovation.

Coordinated Multidisciplinary Design

Civil, mechanical, electrical, plumbing, fire protection, and building systems upgrades were integrated into one coordinated design. As a result, the project supported both immediate renovation needs and long-term facility performance.

Strong Review Performance

The project moved through City of Medical Lake and Department of Health review without a single comment. It also received Labor & Industries Electrical approval with only minor clarification.

Campus-Wide Systems Integration

The BAS and fire alarm systems were tied into campus-wide infrastructure. Therefore, the project improved visibility, monitoring, and coordination across the hospital campus.

Lakeland Village Campus Water Main Replacement

1,300+ Linear Feet Replaced

1 Civil Discipline

Active Occupied Campus

Project Overview

Columbia Engineering Group provided full civil engineering services for the Lakeland Village Campus Water Main Replacement project in Medical Lake, Washington. The project replaced more than 1,300 linear feet of failing water mains for DES/DSHS and upgraded critical campus water infrastructure through replacement of key supply lines and valves.

Because the work took place within an active, occupied facility, maintaining uninterrupted water service during construction was a core design requirement. To support that goal, the project included temporary water bypass routing, utility excavation, stormwater management, and full site restoration. In addition, the design process was accelerated to help move construction forward on schedule.

Project Challenges and Approach

This project required careful planning from the start. Available as-built information was limited, so the design team performed condition assessment and as-built verification to develop a more accurate and constructible solution.

At the same time, the project called for practical and cost-conscious design decisions. That included developing solutions that reduced impacts where possible, including designing around tree removal to help preserve site conditions and control project costs.

Civil Engineering Scope of Work

The civil scope covered both design and construction-phase support for the campus water main replacement.

Water Main Replacement

The project replaced more than 1,300 linear feet of failing water mains, along with key supply lines and valves, to improve the reliability of critical campus water infrastructure.

Temporary Water Bypass Routing

To maintain service within the occupied campus, the design included temporary water bypass routing during construction.

Utility Excavation & Stormwater

The project included utility excavation planning and stormwater management measures to support safe and effective construction.

Site Restoration

Full site restoration was included as part of the civil scope so affected areas could be returned to service after construction was complete.

Assessment, Documentation & Bidding

Services included condition assessment, as-built verification, cost estimating, and preparation of drawings and specifications for public bidding.

Agency Coordination & Construction Support

The project included coordination with the Department of Health and the City of Medical Lake. During construction, the team provided bid support, contractor review, and oversight.

Project Outcome

The Lakeland Village Campus Water Main Replacement project upgraded critical water infrastructure while maintaining uninterrupted service within an active campus environment. By combining bypass routing, targeted utility replacement, and full civil engineering support, the project addressed failing infrastructure without disrupting ongoing facility operations.

Construction-phase involvement also delivered direct value to the Owner. Through contractor review and oversight, Columbia Engineering Group identified and corrected contractor cost discrepancies — helping protect the Owner from unnecessary expenses while keeping the work aligned with project goals.

What Made This Project Stand Out

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Critical Infrastructure Upgrade

The project replaced failing water mains, supply lines, and valves that served an active campus facility, restoring long-term reliability to essential water infrastructure.

✓

Continuous Service During Construction

The design maintained uninterrupted water service through temporary bypass routing and careful construction phasing, keeping the campus operational throughout the project.

✓

Fast-Tracked Design with Limited As-Builts

The team accelerated the design process while working with limited as-built information, using condition assessment and field verification to develop a constructible solution on a compressed schedule.

✓

Strong Owner Support During Construction

Construction-phase services included bid support, contractor review, and oversight — including identification of contractor cost discrepancies that helped protect the Owner from unnecessary expenses.

Vancouver Station Food Cart Pod

8,000 Square Feet

2 Stories

43 Food Carts

Project Overview

Columbia Engineering Group provided turnkey development services for Vancouver Station Food Cart Pod in Vancouver, Washington. The project transformed approximately one acre of unfinished land into a commercial dining and hospitality destination.

The development includes an 8,000 square foot, two-story dining hall and infrastructure for approximately 43 food carts. CEG coordinated architecture, engineering, planning, permitting, and construction from site development through completion.

Project Challenge and Approach

The project required one site to support a commercial dining hall and dozens of independent food vendors. Therefore, building systems and site utilities had to work together as one coordinated development.

CEG integrated architecture with civil, structural, mechanical, electrical, plumbing, fire protection, and site-development services. In addition, environmental, geotechnical, survey, traffic, and landscape disciplines supported planning and permitting.

Project Scope

The scope combined building design with the infrastructure needed for high-volume commercial food service and long-term site operations.

Architecture & Dining Hall Design

The two-story dining hall includes a commercial kitchen, bar with adjacent cooler, restrooms, walk-in cooler and freezer, storage, and office space.

Civil & Site Infrastructure

Civil design included grease interceptors, sanitary sewer laterals, and a stormwater infiltration drywell with pretreatment. The site also required nearly a mile of natural gas piping.

Mechanical & HVAC Engineering

The HVAC system uses multiple outdoor units serving a whole-building variable refrigerant flow system. Mini-splits provide separate cooling for the private office and mechanical room.

MEP & Fire Protection

Mechanical, electrical, plumbing, and fire protection engineering supported the dining hall, commercial kitchen, refrigeration systems, and food service operations.

Food Cart Utility Infrastructure

Each food cart was designed with power, water, sewer, telecom, and gas service. As a result, the site can support individual vendor operations at full scale.

Planning, Permitting & Site Development

CEG coordinated planning, permitting, environmental, geotechnical, survey, traffic, and landscape architecture services for the overall development.

Facility Features

The dining hall was designed to support both guest experience and commercial food service operations. Key features include:

Commercial kitchen
Bar with adjacent cooler
Restrooms
Walk-in cooler and freezer
Storage areas
Office space

Project Outcome

The completed project converted an unfinished parcel into a fully serviced commercial dining destination. CEG’s coordinated delivery connected building design, food service systems, utilities, site infrastructure, and permitting within one development strategy.

As a result, the site can support a large group of independent food vendors alongside a permanent dining hall. The project demonstrates CEG’s ability to manage complex commercial developments that require both building-scale engineering and extensive site infrastructure.

What Made This Project Stand Out

Turnkey Development Delivery

CEG supported the project from planning and permitting through multidisciplinary design and construction.

Infrastructure for Approximately 43 Food Carts

Coordinated utility service allows individual vendors to operate within one large commercial development.

Extensive Site Utility Design

Stormwater, sewer, grease management, and natural gas infrastructure were integrated across the property.

Flexible HVAC Design

A whole-building VRF system and targeted mini-split cooling support different operating needs within the facility.