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Geotechnical Services

A crane and workers placing segments of a soundwall.
Department of Transportation

Geotechnical Services

Geotechnical Services Section supports the planning, design, construction, maintenance and rehabilitation of geotechnical features essential for MDOT's bridge and heavy civil infrastructure. In‑house capabilities include foundation engineering and design for bridges, culverts and complex structures; subsurface investigation of soil, rock, and groundwater; in-situ and laboratory testing of soils; laboratory testing and specification of geosynthetic materials; geotechnical policy, project scoping, contract management, and quality assurance oversight of external partners; management and correction of geohazard sites.

Ryan Snook, Chief Geotechnical Engineer

Carol Casteel, Administrative Assistant

Reference Documents

Geotechnical Manual
Design of Temporary Earth Retention Systems (TERS) - Part 1
Design of Temporary Earth Retention Systems (TERS) - Part 2
Rock Quarries with Passing Durability and Gradation Tests (Riprap, Special, and Other Items)


Chris Johnecheck, GeoHazards Engineer

Foundation Design & Engineering Analysis

Erron Peuse, Foundation Analysis Engineer

Subsurface Investigation & Asset Management
Tony Brehmer, Transportation Engineer

Consultant Coordination & Quality Assurance Oversight
Joel Tichenor, Transportation Engineer

Geotechnical Construction Support
Tony Pietrangelo, Transportation Engineer

Soils & Geosynthetic Testing
Bethany Enright, Transportation Engineer