Welcome, TerraSite Design, to the Interstate Engineering Team!

Engineering & Design

Creative Solutions, Engineered to Last.

Our engineering and design services bring together technical precision, practical experience, and innovative thinking to solve complex challenges. Whether we are planning new infrastructure, upgrading existing systems, or designing specialized facilities, our team combines creativity with proven methods to deliver results that work: on paper, in the field, and for the community. We focus on getting the details right from day one so every project runs smoothly, stays within budget, and meets your long-term goals.

Let’s Build Something That Lasts.

Services

Civil Engineering

Planning, designing, and managing essential infrastructure projects that strengthen communities

Structural Engineering

Designing, analyzing, inspecting, and rehabilitating buildings, bridges, and other critical infrastructure

Surveying & Mapping

Accurately capturing and interpreting site data to support informed decisions and keep projects on track

Transportation Planning

Developing the full life cycle of transportation systems with a focus on safety, durability, and planning for the future

Water & Wastewater Systems

Collaborating with city leaders and operators to identify issues, secure funding, and design solutions built to last

We're Proud of What We Do

Work With Us

1

Understand Your Needs

We start by listening; to your goals, constraints, and vision. Site visits, feasibility studies, and early-stage planning ensure we understand the full picture before putting pencil to paper.

2

Design with Precision

Our team blends creativity with compliance, using advanced modeling, CAD tools, and decades of experience to create designs that work on paper and in the field. Every detail is reviewed for constructability, safety, and long-term performance.

3

Deliver with Confidence

From permitting to bid support and construction oversight, we stay by your side until the project is complete, on time, on budget, and built to last.

Featured Projects