HK Contractors completes many services and offers many products.
With locations across North America, CRH is everywhere you're building. From asphalt and precast to masonry and glass—we’re your single source for building materials on your next construction project.
George Hartwell began the operations of Hartwell Excavating in 1950 as a small construction company with a backhoe and a dump truck focusing on digging basements. Shortly thereafter, Hartwell moved into small utility work. On July 25th, 1975 Kennaday Paving joined forces with Hartwell Excavating to create HK Contractors, Inc. We have been a mainstay of Idaho Falls and the surrounding areas ever since. As one of Idaho’s largest construction and material supply companies, we have also expanded our service area to include Montana and Wyoming.
To design, build and deliver turnkey, high-quality and cost-effective construction projects on schedule for our clients while providing quality employment and career growth opportunities for HK Contractors team members.
Every project presents unique challenges that call for specific solutions. We're here to provide innovative building solutions, project ideas, product information, in-depth industry analysis and insight where to find the right building materials.
National Asphalt Pavement Association
Western Federal Lands Highway Division
HK has received numerous awards from the states of Idaho and Wyoming for our safety record in the heavy highway construction
industry. For the past 10 years, the State of Wyoming has repeatedly noted our achievements in working 100,000 to 200,000 hours per year without an accident.
The State of Idaho has also awarded HK for our outstandingly low accident injury rate compared to other construction companies working up to 500,000 hours per year in the state.
Part of a 60-acre mixed use development outside of Kansas City, the Museum at Prairiefire tells a story of geology, culture and the practice of prairie landscape management through controlled burns. Located in Overland Park, KS, the 41,000-square-foot museum is clad in stone that represents the rolling hillside of the region alongside fiery sparks of color.
The museum was developed by Fred Merrill, Founder and President of Merrill Companies, and features a rotation of exhibits from New York City’s American Museum of Natural History (AMNH), a Children’s Discovery Room, and expansive archaeological specimens.
The vision of Jonathan Kharfen, AIA, LEED senior associate with Verner Johnson Inc. of Boston, MA, the museum was to reflect the story and uniqueness of controlled burns in the local Flint Hills of eastern Kansas. Having experienced the burns himself, he wanted the building envelope to showcase the charring of the hillsides with a gradient of colored stones, along with the colored insulated dichroic glass representing the flames. Kharfen wanted to work with a stone manufacturer that could create the colors that would achieve the desired “charred” gradient effect.
Additionally, for the second-floor Discovery Room, Kharfen wanted the balcony “completely wrapped in stone, even its sloping soffits.” With a requirement for such a unique geometric shape, matching the rest of the building’s stone façade within code tolerance posed the project’s greatest obstacle.
“It’s a large balcony that was a key feature of the museum concept,” said Michael Reardon, McCownGordon Construction, Senior Project Manager. “While we’ve used stone in the past on arches, to the magnitude it was required for this project, we needed to figure out a system to support it.”
The stonework of the museum is a mix of regionally-sourced natural limestone and manufactured stone veneer from Echelon, which is a product line from Oldcastle APG, A CRH Company. The stone was set by D&D Masonry of Kansas City, MO.
“We incorporated four standard Echelon Cordova veneer colors and then worked closely with [CRH] to create two custom colors,” said Kharfen.
The challenge of stone on the balcony was solved with additional help from Echelon. Representatives at Echelon introduced Kharfen and Reardon to the Fast Track Stone System by Innovative Building Products, which allowed kerfed stone to sit in a lipped track. This mechanically holds the stone in place, despite the gravity load of the sloping soffit. The two long sides of each stone are secured in the track top and bottom.
To make sure the sloped soffit system was safe, D&D Masonry created a mock-up in a Kansas City vocational facility. They were able to simulate how the soffit system would be installed and how the stone would sit securely in the track system.