Third Generation, Family Owned

Central Specialties, Inc. (CSI) is into a third generation, family owned, general contracting company serving Minnesota and the Dakotas. CSI was founded in 1976, over 40 years ago, by Al Minnerath with a vision and desire to provide next level services in the heavy highway construction market.

We are proud of the people who work for us and the care they put into every project. Thank you to all of our customers who rely on our team and our quality heavy highway construction services.

Management Team

  • Allan Minnerath: President and CEO
  • Brian Minnerath: Vice President
  • Ryan Minnerath: Vice President
  • Alex Sweep: Vice President
  • Cash Johnson: Vice President/Operations
  • Ross Larson: Vice President and CFO

We support the following organizations:

  • Minnesota Chamber of Commerce
  • Alexandria Area Chamber of Commerce
  • Association of General Contractors of MN
  • American Road & Trans Builders Association of MN
  • Association of Women Contractors
  • Greater Lakes Area Safety and Health Council
  • MN Association of Asphalt Pavement (MAAPT)
  • MN Mine Safety Association
  • MN County Engineer Association (MCEA)
  • MN Transportation Alliance
  • MN Progress In Motion
  • National Federation of Independent Businesses
  • National Society for Human Resource Management (SHRM)
  • MN West Central Society of Human Resources Management
  • Vikingland Builders Association
  • Alexandria Technical College - Diesel Mechanic Program, Scholarships
  • Alexandria Area High School - MECHATRONIC Scholarship
  • Alexandria Dollars for Scholars



ND DOT Ride Quality Award


MN DOT Best of Class Merit Award


MN DOT Safety Award

MN Army National Guard | Innovative Contracting Award | State of MN Grading & Base Award | Work Zone Safety Award
State of MN Merit Award | Joseph Holmes Safety Assoc. | MN Governor Certificate | Code of Ethics

Delivered Where You Want It. When You Want It.

Central Specialties delivers your asphalt and aggregate to your job site where you want it, when you want it. Just give us the word, we’ll set a time and it will be there. As a full service general road contractor Central Specialties, Inc. also provides these services: Site work includes Excavation, Culvert Installation, Site Drainage, Commercial, Industrial and Residential Site Development.

To discuss your next project with one of our seasoned staff, call or e-mail us at

“CSI is a leader in the road construction industry in Minnesota and it's our dedicated and experienced employees that keep us at the top.”