About Chosen Valley Testing, Inc. | Rochester, MN

Building on experience.

LOGO for Proposals


Colby Verdegan, CEO

About Chosen Valley Testing Inc.

We're a team of experienced professionals who provide geotechnical engineering, construction materials testing and drilling services for you. We're committed to providing exceptional value by delivering quality service for a fair price.

Company history

"I created a firm that tries to be practical and knowledgeable about the testing business, the construction processes in which we are involved, and the long term performance implications of our tests and observations.


This starts by having me being readily accessible in person or by cell phone to both my employees and our clients in solving problems…and continues with having experienced personnel at all locations.  We strive to be approachable – so that potential problems are identified early."


-Colby Verdegan, CEO

Our philosophy

Experienced staff receive ongoing training



1410 7th St NW

Rochester, MN 55901

Office: 507-281-0968

Fax: 507-289-2523


St. Paul

245 Roselawn Ave. E.

Suite #29

St. Paul, MN 55117

Office: 651-756-7384

Fax: 651-888-6121


St. Cloud

414 37th Ave. North

St. Cloud, MN 56303

Office: 320-774-3500

Fax: 320-774-3554


La Crosse

1019 2nd Avenue SW

Onalaska, WI 54650

Office: 608-782-5505

Fax: 608-785-2818


Mason City

421 N. Georgia Ave.

Mason City, IA 50401

Office: 641-201-1050

Fax: 641-201-1012


Cedar Falls

3012 S. Hudson Road

Cedar Falls, IA 50613

Office: 319-242-8284

Fax: 319-242-8285

  • Minnesota Licensed Professional Engineer

  • Wisconsin Licensed Professional Engineer

  • Iowa Licensed Professional Engineer

  • Illinois Licensed Professional Engineer

  • National Council of Examiners for Engineering and Surveying Record

  • Geological Society of America

  • Association of Environmental and Engineering Geologists

  • Minnesota Society of Professional Engineers

  • National Society of Professional Engineers

  • Licensed Monitoring Well Installer

  • Minnesota Department of Transportation (MNDOT) Concrete Field and Batch Plant Technicians

  • Wisconsin Department of Transportation (WISDOT) Highway Technician Certifications

  • Nuclear Radiation Safety Certification

  • International Code Council Certification - Reinforced Concrete

  • International Code Council Certification - Masonry

  • International Code Council Certification - Fireproofing

  • Iowa Department of Transportation (IADOT)

  • United States Army Corp of Engineers (USACE)

  • National Voluntary Laboratory Accreditation Program (NVLAP)

  • American Concrete Institute (ACI) Field Testing Technicians

  • (ICBO)s

  • Post Tensioned Institute Certified Inspection

  • American Welding Society (AWS) Inspector

  • Minnesota Department of Health Licensed Monitoring Well Installer

  • US Corp of Engineers Laboratory Certification

Licenses and certifications

We were founded in 1995 by Colby Verdegan, PE, who had 15 years of prior experience at other testing companies before starting the firm.


Despite tough economic conditions, the company has expanded to five locations across three states. We offer a fleet of drill rigs, support vehicles and testing equipment.

logo logo logo National Council of Examiners for Engineering and Surveying Record Geological Society of America Association of Environmental and Engineering Geologists National Society of Professional Engineers Wisconsin Department of Transportation Minnesota Department of Transportation American Concrete Institute logo International Code Council Certification Minnesota Department of Health New auger in use Trench Kwik Trip