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Civil Engineering Engineering with Enduring Value.

Providing comprehensive services to both public and private clients, we go beyond simply doing the job well. With a deep well of experience and genuine relationships developed over decades, we serve as a resource channel and a communications link between all stakeholders, bringing everyone together to rally around a common vision of success.

Aerial view of a landscaped multi-lane roundabout with cars and yield markings, crosswalks and walking paths around it, bordered by trees and a small pond.

We are perceptive and responsive to the ever-evolving demands facing our clients, developing creative yet practical solutions to overcome challenges and move projects forward. Our transparent, solutions-based approach delivers projects safely, within budget, on time, and with elegant, practical, and timeless design, ensuring that your project will benefit the community for generations to come.

Three colleagues in a modern conference room review maps and documents covered with sticky notes, discussing plans around a white table beneath a wall photo of a snowy mountain landscape.

We are perceptive and responsive to the ever-evolving demands facing our clients, developing creative yet practical solutions to overcome challenges and move projects forward. Our transparent, solutions-based approach delivers projects safely, within budget, on time, and with elegant, practical, and timeless design, ensuring that your project will benefit the community for generations to come.

Three colleagues in a modern conference room review maps and documents covered with sticky notes, discussing plans around a white table beneath a wall photo of a snowy mountain landscape.

Our Civil Engineering Services

  • Insights & Analytics

    • Irrigation Conservation, Feasibility Studies, & Site Capacity Constraints Mapping
    • Hydrologic Baseline Assessments & Watershed Flow Analyzing
    • Existing Utility Infrastructure Records Review & Capacity Evaluations
  • Planning & Design

    • Site Layout, Precise Grading, & Earthwork Optimization Design
    • Stormwater Management Infrastructure & Low Impact Development (LID) Systems
    • Utility Network Design (Domestic Water, Gravity Sewer, Force Mains & Franchise Utilities)
    • Roundabout Design & Road & Transportation Improvements
    • Master Planning (Multi-Family Land Development, Parks & Open Spaces & Recreational Facilities)
    • Irrigation & Agricultural Conveyance & Distribution Design
  • Compliance & Permitting

    • Engineering Design Packages for Municipal Code Compliance
    • FEMA Floodplain Modeling, Map Revisions (CLOMR/LOMR) & No-Rise Certifications
    • NPDES Industrial & Construction Stormwater General Permit Technical Writing
  • Project Delivery

    • Preparation of Final Bid-ready Construction Documents & Specifications
    • Review & Approval of Contractor Product Submittals & Shop Drawings
    • Final Utility Performance Certifications & Engineering Record Drawings Sign-off
Workers in hard hats weld and align a long green pipeline as a crane suspends a section at a dusty outdoor job site, with trucks, trees, and distant mountains in the background.
Portrait of a man with long brown hair wearing a blue dress shirt and striped tie

Paul Harmsen, PE

Brand Manager, Pasco

“At MacKay, our civil engineering team takes a collaborative approach to every project. Working alongside planners, surveyors, landscape architects, environmental professionals, permitting specialists, and other in-house experts allows us to look at challenges from multiple perspectives and deliver more complete solutions for our clients.”