When a parking lot project goes wrong, the consequences ripple through budgets, schedules, and reputations. For Heartland Concrete Construction in Hastings, Nebraska, a 100,000-square-foot grocery store parking lot became a case study in how quickly site engineering failures can derail a job. The plans made no sense. The engineer had been fired. Elevations were off across the entire site. Yet the general contractor told Heartland to take whatever steps necessary to move forward. This article examines how the company used Trimble technology to re-engineer a failing project, and what contractors can learn from the experience. For builders working with challenging site conditions, understanding Colorful Concrete Tiles a Complete Guide to Decorative finishes and surface treatments can also inform decisions about final paving aesthetics after the heavy grading work is done.
The Scope of the Problem: Why the Parking Lot Was Unworkable
Heartland Concrete Construction, founded by Jeff Wissing in 1993 and now co-owned with his son Beau Wissing, is primarily a flatwork company. Roughly 70 percent of its business involves concrete paving in commercial applications, particularly parking lots. The firm also handles flooring for larger commercial facilities and some residential work. It is not a large operation, and it does not carry an in-house engineering department.
When Heartland was hired to finish-grade and concrete pave the grocery store parking lot, the team expected a straightforward commercial job. What they found was anything but.
Bad Plans, Fired Engineer, and Conflicting Elevations
Beau Wissing described the situation bluntly. The parking lot had valleys and ridges scattered across the site. Elevation data from the plans did not match field conditions. The engineer who designed the project had been fired, leaving behind a set of drawings that made no sense on the ground.
Among the specific problems:
- Elevation mismatches across the entire 100,000-square-foot area
- Unbuildable transitions between adjacent paving sections
- A curb approach with extreme, unsafe slope changes
- No single set of corrected drawings to work from
Beau Wissing called it the most complex parking lot his company had ever attempted.
The Entrance: The Worst Part of the Entire Project
The approach into the parking lot was the critical failure point. The existing design called for a 150-foot curb run with a total fall of 3 feet. However, the slope distribution made no practical sense. More than 2.5 feet of that elevation change were concentrated in the first 20 feet of the approach. The remaining 90 feet of curb had only 4 inches of fall.
This configuration would have created a dangerously steep drop-off for vehicles entering the lot. It would have been both a safety hazard and a potential liability issue. The transition from the street into the parking lot needed a complete re-engineering before any concrete could be placed.
How Trimble Technology Re-Engineered the Site
Facing an unworkable project and no engineering support from the original designer, Heartland turned to Trimble technology and the expertise of SITECH Mid-Plains. The solution combined software-based redesign with hardware-grade control to salvage the job.
Trimble Business Center HCE: Redesigning in 3D
The first step was re-engineering the failed entrance design using the Trimble Business Center HCE system. Beau Wissing worked directly with the design team at SITECH Mid-Plains to create a new approach that actually worked in the field.
Rather than guessing at grades and hoping for the best, the team built a complete 3D model of the redesigned entrance. This allowed them to rotate the model, inspect every transition, and verify that drainage would flow correctly before any dirt was moved. As Wissing noted, the ability to see the design in three dimensions and confirm everything was flowing properly was what made the project constructible.
Once the new design was finalized in Business Center HCE, Heartland exported the data directly to the machine control system on site. There was no need for paper stakes, stringlines, or manual grade checking. The machine knew exactly where to cut and fill based on the digital model.
GCS900 3D Grade Control on a Compact Track Loader
Heartland used the Trimble GCS900 3D grade control system mounted on a Bobcat compact track loader. SITECH Mid-Planes configured a customized setup featuring an 8-foot grader attachment on the front of the track loader, with all controls operating automatically.
The system worked much like a full-size road grader but in a compact, maneuverable package. The operator could drop the blade to dirt level and the readout would immediately indicate whether to add or remove material. For areas requiring extensive rework, a second machine would rough-grade the area first, and then the Bobcat with GCS900 would come through to achieve final grade with precision.
Wissing noted that while this two-pass approach was not his preferred method, it made for a quick recovery on a project that had already gone sideways.
Universal Total Station for Site-Wide Layout
Alongside the grade control system, Heartland deployed the Trimble SCS900 Site Controller Software with a universal total station. This combination addressed the broader surveying and layout challenges across the parking lot.
The total station allowed the crew to shoot elevations across the entire site quickly and accurately. When the original plans conflicted with field conditions, the total station provided the real data needed to make informed decisions about adjustments. Wissing emphasized that without this technology, the project would have been nearly impossible for a small contractor to complete.
Productivity Gains: From 10 Workers in a Week to 6 Workers in a Day
The impact of Trimble technology on Heartland’s productivity went far beyond salvaging one troubled parking lot. The company began using the systems across all its projects and saw dramatic improvements in speed, crew size, and accuracy.
Measurable Time and Labor Savings
Wissing cited a typical 30,000-square-foot commercial job to illustrate the difference. Before adopting the grade control system, fine grading alone required one week to a week and a half of work. The crew needed 10 workers for layout, grading, and stakeout.
With the GCS900 and SCS900 systems in place, the same fine grading work was finished in a single day. Instead of 10 workers, the crew required only 6. That represents a productivity improvement of roughly 80 to 90 percent on the grading portion of the job.
| Metric | Before Trimble System | With Trimble System |
|---|---|---|
| Time for fine grading (30,000 sq ft) | 5 to 7.5 days | 1 day |
| Crew size for grading and layout | 10 workers | 6 workers |
| Stakeout method | Manual stringline | Digital model |
| Grade checking | Manual with level | Automatic machine control |
| Error rate (estimated) | Human error variable | Near zero |
The system paid for itself quickly. Wissing noted that a few months after adopting the technology, the company could not believe how strong the return on investment had turned out to be.
New Services and Broader Bidding Range
One unexpected benefit was that Heartland started contracting out its fine grading service to other construction firms. The 3D automatic control on a compact grader became a competitive differentiator. No other concrete contractor of similar size in the area was offering that capability.
The technology also expanded the range of projects Heartland could bid on. With higher productivity and greater accuracy, the company could take on larger commercial jobs that would previously have seemed out of reach. Wissing noted that it completely changed their outlook on bidding and the types of projects they pursued.
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Lessons for Small and Midsize Concrete Contractors
The Heartland Concrete story offers practical takeaways for any contractor working on commercial flatwork, particularly parking lots and large slab-on-grade projects.
Technology Is Accessible for Smaller Firms
Beau Wissing believes Trimble technology is designed with smaller contractors in mind. The combination of compact equipment with automated grade control makes it feasible for a company without an engineering department to handle complex grading work that would otherwise require outside consultants or multiple weeks of manual labor.
Steps for a small contractor considering grade control technology:
- Assess the typical project type and size your firm handles most frequently
- Consult with a local Trimble dealer like SITECH to discuss customized configurations
- Start with a single piece of equipment and one grade control system to prove the ROI
- Cross-train at least two operators on the system to avoid single-point dependency
- Use the system for fine grading first, then expand into layout and survey work
Digital Models Eliminate Guesswork in the Field
One of the most valuable features Wissing highlighted was the ability to preview the jobsite before arriving in the field. When the SITECH team sends a project file, he can pull it up in 3D, rotate it, and inspect every detail from his office. If a grade transition looks wrong or a drainage slope is insufficient, it can be caught and corrected before the crew ever mobilizes.
This capability eliminates the costly scenario of having a crew standing around while the foreman figures out what the plans actually mean. It also reduces the risk of placing concrete over an incorrectly graded base, which leads to costly demolition and repour.
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Documentation and Quality Assurance Benefits
The SCS900 system serves as a record keeper, eliminating the need for handwritten notes on paper. It automatically documents grade elevations, cut and fill volumes, and as-built conditions. In the event of a dispute or legal issue, this digital trail provides verifiable evidence of the work performed.
The system also functions as a fact-checker. Wissing reported that they have caught surveying mistakes using the total station that would have led to expensive rework if detected later in the process. The ability to verify existing conditions against the plan before starting work is a significant risk management advantage.
Confidence Reduces Stress and Liability
Wissing summed up the intangible benefit of the technology succinctly. He has complete confidence that the job is done right when using automated grade control. There is much less opportunity for human error compared to manual stringline methods. On projects with significant liability exposure, that confidence matters. As he put it, the technology makes it easier to sleep at night.
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The Heartland Concrete story demonstrates that even a failing project can be rescued with the right combination of technology, dealer support, and willingness to adopt new methods. For concrete contractors who regularly handle parking lots, commercial slabs, and site work, 3D grade control is not just a productivity tool. It is a risk management system that protects budgets, schedules, and reputations.