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Specialty: General Contractor

Lowry Hotel

Corval Group is the general contractor for the renovation of this 10 floor building. Corval is also provided design-build services for this historical St. Paul project which involves a complete remodel, including a hotel, student housing, a restaurant and bar....

Countryside Elementary – Mechanical Upgrade

Self Performing general contractor for the school mechanical systems upgrade project. Corval Group self performed over 65% of the overall project labor utilizing six different core Corval trades, as well as managing 17 different subcontractors to bring the project in on schedule. The project included demolishing the existing heating...

CertainTeed – Asphalt Unloading Station

Corval was the prime contractor for CertainTeed’s new asphalt unloading and processing expansion. The purpose of the project was to install mechanical systems to allow for asphalt to be unloaded from rail cars or trucks, processed and stored at the existing facility. The scope of work included installation of...

Great River Energy – Spiritwood Station

Corval was the general contractor for this power plant in Spiritwood, North Dakota. Our scope of work included structural steel erection, boiler assembly, and equipment setting. We also installed packaged boilers and performed mechanical piping services, including ASME pipe services....

Hutchinson Utilities Commission – Unit 5

Corval was the general contractor hired by Hutchinson Utilities Commission for the installation of Unit 5, a Wärtsilä 20 V34SG gas-fueled engine of a nominal 9.4 MWe. We installed the generator set, complete with all structural, mechanical, electrical, and emissions control systems, as well as equipment, necessary controls, and...

Xcel Energy – Black Dog Plant

Corval was the prime contractor for the installation of a Siemens 501CT, a Deltak HRSQ, and a Westinghouse steam turbine in an existing power plant. Our additional scope included the demolition of an existing coal-fired boiler....

Minnesota Municipal Power – Expansion

Corval was the prime mechanical contractor responsible for the installation of a HRGS and SCR system on a GE 7FA Combustion turbine at this plant. Our work expanded this Simple Cycle Power facility to a Combined Cycle Plant. We were also responsible for all piping, including the high pressure...

Southern Montana Electric – Highwood Generating Station

Corval was the general contractor responsible for site preparation, underground utilities, foundations, and complete installation of the turbine generator and balance of plant systems for the Highwood Generating Station. We placed 3,000 cubic yards of structural steel during construction. The Highwood Generating Plant is a simple-cycle combustion turbine plant...

Montana Dakota Utilities Co. – Heskett Station

Corval was the general contractor for the construction of a 88 MW gas-fired combustion turbine installation. We were awarded Phase I, the site civil contract, which included site grading, underground utilities, and construction of the service building including its foundation. Self-performed work included concrete and piping; we managed the...
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