Project Overview
Columbia Engineering Group provided civil engineering for 3 Lot Subdivision in Washougal, Washington. The project developed a 0.64-acre site into a three-lot residential short plat designed to support new single-family homes.
CEG’s scope included a private driveway serving all three lots, along with grading, utility infrastructure, stormwater management, and frontage improvements. In addition, the project included construction documents and permitting coordination with local authorities to help keep the development aligned with applicable standards.
Site Development Approach
This project required coordinated site infrastructure within a relatively compact residential property. Therefore, the civil design had to balance lot access, grading, utilities, and stormwater performance in a practical way.
At the same time, the subdivision needed efficient long-term functionality. As a result, CEG designed the supporting infrastructure to serve all three lots while helping streamline both construction and permitting.
Engineering Scope of Work
CEG delivered civil engineering for the short plat from site planning through permit-ready documentation. Overall, the scope focused on lot access, utility service, stormwater management, and coordinated frontage improvements.
🏘️ Short Plat Development
CEG provided civil engineering to develop the 0.64-acre site into a three-lot residential short plat in Washougal, WA.
🛣️ Private Driveway and Frontage Improvements
The project included design of a private driveway serving all three lots, along with frontage improvements and sidewalk extensions to support residential access and site function.
📏 Grading and Retaining Walls
CEG designed site grading and retaining walls to support lot development, drainage, and overall site constructability.
💧 Utilities and Stormwater
The civil scope included domestic water, sanitary sewer, stormwater systems, street illumination, and utility service design for the new residential lots.
📋 Construction Documents and Permitting
CEG prepared construction documents and managed permitting coordination with local authorities to support compliance with applicable development standards.
Project Outcome
3 Lot Subdivision transformed a 0.64-acre site into a coordinated residential short plat in Washougal, WA. Through civil engineering design, CEG supported access, utilities, stormwater, frontage work, and permit-ready documentation for three new single-family lots.
Just as importantly, the project balanced infrastructure needs with an efficient design and permitting process. As a result, CEG helped deliver a practical site development solution for a small-scale residential subdivision.
What Made This Project Stand Out
The project supported three residential lots on a compact site through well-coordinated civil infrastructure planning.
CEG designed a private driveway, frontage improvements, and sidewalk extensions to support access and site functionality.
The civil scope included domestic water, sanitary sewer, stormwater systems, street illumination, and utility service design for the short plat.
CEG prepared construction documents and coordinated permitting with local authorities to keep the project aligned with development standards.