
Aterra Solutions
Ambler, PADams, Levees, Severe Flooding, and Geotechnical Services
Project: Inundation Mapping, Hazard Assessments and Emergency Action Plans for Forest Service Dams
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Dams, Levees, Severe Flooding, and Geotechnical Services
Project: Inundation Mapping, Hazard Assessments and Emergency Action Plans for Forest Service Dams
Geotechnical Engineering throughout the Northwest
Project: I-90 SH-41 Interchange Temporary Shoring

The Benchmark for Professional Services
Service detail: Geotechnical Engineering

Geotechnical engineering, environmental services, construction materials testing, and special inspections provider
Service detail: Geotechnical Engineering
Reliable. Innovative.
Project: Dulles Corridor Silver Line Metrorail Project Phase II

Specialists in Deep Foundation Design, Construction, and Testing and Slope Stability Problems
Project: State Route 67 Bridge Repair
Relentless seekers of the best solutions.
Project: Royse City, Texas Drainage Master Plan
Helical Drilling (HELICAL) is a geotechnical design-build firm serving New England for over 30 years, founded by Rimas Veitas, P.E. HELICAL pioneered the use of helical piles, Geopier ground improvement systems, and ductile iron piles across the Northeast. Combining geotechnical engineering and construction under one roof, HELICAL delivers ground improvement, deep foundations, earth retention, and underpinning solutions for demanding projects across Massachusetts, Connecticut, Maine, and the broader New England region.
Service detail: Ground Improvement

Fear No Challenge
Project: Beaver River Bridge Segment Falsework & SOE
Kokua Geotech LLC is a Honolulu-based geotechnical engineering practice established in 2016. It provides comprehensive geotechnical engineering services across all major Hawaiian Islands, including site explorations, laboratory soil testing, engineering analysis, and construction observation. The practice combines deep regional experience in Hawaii and the Pacific with the responsiveness and agility of an independent small business.
Service detail: Geotechnical Explorations

An engineering firm you can rely on
Service detail: Foundation Engineering

Leaders in Ground Improvement, Soil Reinforcement and Deep Foundations Field
Project: New Tower at Mayaguez Resort and Casino

Engineering Experts Based in Traverse City, Michigan
Service detail: Structural Engineering

Full-Service Design, Engineering, Geotechnical Firm
Project: Lake Lawne Stormwater Facility Design

Designing solutions for your geotechnical engineering and environmental challenges.
Project: Nu'upia Ponds Observation Towers
Structural & Foundation Engineering / Construction Risk Management
Service detail: Foundation / Geostructural Engineering

Southwest Florida's Best Choice for Engineering Services
Project: Lighthouse Point
Yeh and Associates, Inc. is a Denver, Colorado geotechnical engineering and construction management firm established in 1999. Specializing in geotechnical investigation, geologic hazard evaluation, foundation design, pavement design, rock slope stability, and geotechnical instrumentation, Yeh and Associates serves transportation, infrastructure, airports, rail, tunnel, and commercial clients across the US with a Pacific Region presence in California.
Project: Canyonlands Field Airport