Gary Hahn, Pe Email & Phone Number

Greater Minneapolis-St. Paul Area

Subsurface Constructors is a full service specialty geotechnical contractor and ground improvement specialist.Subsurface has served the construction industry for more than 110 years in Missouri and adjacent states, bringing innovative, cost-conscious and practical approaches to design and construction of deep foundations, earth retention systems and ground improvement. Our ground Improvement systems include aggregate piers (vibro stone columns), rigid Inclusions (vibro concrete columns), vibrocompaction, and wick drains. Subsurface has evolved over a century from a traditional deep foundation contractor to a full-service geotechnical designer and contractor.Over the last 15 to 20 years, Subsurface has become as a leader in ground improvement and has designed and installed ground improvement elements for over 900 projects in 36 states, including many projects in the North Central region over the past few of years. Please do not hesitate to let us know if you have any questions related to ground improvement, deep foundations or earth support systems.Subsurface's North Central Region is comprised of Minnesota, Wisconsin, North Dakota, South Dakota, Iowa and Nebraska.

Greater Minneapolis-St. Paul Area

As a Project Manager I am responsible to assist the Director of Operations in the management, conduct and quality of assigned projects with the goal of continually improving service to our clients. I am also responsible for the marketing and maintenance of assigned contacts and clients.

Greater Minneapolis-St. Paul Area

Bloomington, Mn

Bloomington, Mn

Braun Intertec has provided thousands of engineering and environmental solutions. Over the years, we have built a comprehensive scope of services in engineering and environmental consulting, materials and analytical laboratories, and testing services. We help clients with site selection and planning, design, construction, operations, and property management. We have extensive expertise in a wide range of industries.I am working in the engineering/consulting division of Braun's main office in Bloomington, MN. I am involved with several projects ranging from construction site observations/inspections, geotechnical evaluations of potential construction sites, project management of material testing projects, noise/vibration monitoring, as well as pre-construction condition surveys.

Actively involved in the design of concrete parking structuresPerformed structural calculations for the design of concrete parking structuresKnowledge of design specifications of slabs, beams, and girdersWorked with Restoration department - Construction ManagementInspection of potential job sitesContract negotiations and plan readingWeekly meetings with clients

Worked with graduate students in setting up and carrying out researchKnowledge of material testingConcrete compression testing (cylinders and beams)Shear testing of concrete beams with steel dowelsStrength testing of reinforced concrete girders with pre-tensioned rodsBuckling test of metal webbed panelsTesting of deep precast, pre-stressed hollow core slabs to failure

Bachelor Of Science (Bs), Civil Engineering

Bachelor'S Degree, Civil Engineering