Koelker Excavating

The ground work is where it all begins.

Our crew is back on site at Casey’s in Central City prepping for the installation of 5 ADS StormTech® SC-800 chambers. You can see the excavation, geotextile fabric, and gravel bed all being laid out and getting ready for the big install. Meanwhile, the Casey’s building is really starting to take shape in the background!

Big equipment, a solid crew, and a lot of gravel. That’s how we do it. 💪🏻

From underground utilities to mass excavation, Koelker Excavating handles every phase of the site development process.

Our operation is built to take on the full scope of civil work, including grading, drainage, demolition, and site development, with the equipment and capability to keep projects moving efficiently across Eastern Iowa and beyond.

Building a strong reputation in civil construction takes more than moving dirt. It takes the right people, the right equipment, and the ability to handle projects that come with tight schedules, changing conditions, and a lot of responsibility behind every decision made on site.

Over the years, we’ve been fortunate to earn the trust of contractors, developers, and communities across Eastern Iowa by continuing to take on bigger challenges and delivering work we’re proud to put our name on.

Thank you to everyone who has supported Koelker Excavating over the years and helped us continue to grow.

Built for the work that matters. From site prep and grading to underground utilities and full site development, Koelker Excavating is equipped to handle projects from the ground up.

If you’re planning a project and need a team that can take it from raw ground to build-ready, reach out through our website https://koelker-excavating.com/ to get the conversation started.

Tank setting day in Central City. The underground fuel tanks for the new Casey's are now installed, a key milestone that pushes the project into its next phase.

From excavation and base prep to crane placement and backfill, this process requires coordination and accuracy at every step. From here, the focus shifts toward utility tie-ins and building preparation.

Appreciate the work from OWL Services, Martinson Construction, and Barnhart to get it done right.

Photos by Webbldr

When there’s work to be done, we show up ready to eat. Big buckets, deep cuts, and a crew that’s always pushing to get more done every day.

Central City, IA is the location for our latest project, the future home of a new Casey's gas station. Right now, we’re stripping topsoil with the D6T and preparing the site for mass grading operations.

Every project starts here, turning undeveloped ground into a build-ready site. Follow along as we continue to make progress on this project.

From site prep to final grade, Koelker Excavating delivers full-scope excavation services that keep projects moving.

Our team handles everything from land clearing and demolition to underground utilities, stormwater systems, and precision grading, all done in-house with experienced crews and the right equipment.

Built on hard work and accountability, we take pride in doing the job right the first time.