7NT Engineering

Overview Capabilities Process Projects Contact

Capability overview

Engineering

7NT geotechnical engineers and project managers work with owners, architects, and design engineers to develop investigation programs and economically practical foundation systems.

7NT's engineering services cover the planning, investigation, analysis, and design support needed to understand subsurface conditions and reduce geotechnical risk.

The original engineering service page frames this work as a partnership with owners, architects, and design engineers to develop practical recommendations for foundations, pavements, retaining structures, ground improvement, temporary systems, and construction support.

What this includes

Capabilities

Subsurface, geologic, groundwater, sampling, and laboratory investigation
Earth retaining structures and temporary shoring systems
Ground modification, lime/cement stabilization, micropiles, and dewatering
Pavement evaluation, design, rehabilitation, and traffic analysis
Foundation analysis for spread footings, mats, piles, drilled shafts, and caissons
Settlement monitoring, excavation stability, slope stability, and soil erosion control

Investigation and evaluation

Subsurface Investigation
Site Reconnaissance
Geologic Investigation
Groundwater Monitoring
Sampling and Testing
Laboratory Investigations
Existing Pavement Evaluation

Earth retaining structures

Earth Retaining Structure Design
Gravity Retaining Wall
Sheet-Pile Wall
Cantilever Retaining Wall
Counterfort Retaining Wall
Segmental Retaining Wall
Soil and Rock Nailing

Ground modification and improvement

Deep Mixing Method (DMM)
Ground Modification Techniques
Lime/Cement Stabilization
Dynamic Compaction
Geofabric/Geogrid
Dewatering
Micropile
Sand/Stone Columns/Geopier

Pavement and material evaluation

Pavement Condition Index (PCI)
Structural Analysis
Material Evaluation
Subgrade Investigation
Traffic Analysis
Rehabilitation
Recommendation

Foundation analysis and design

Foundation Analysis and Design
Spread Footing
Mat Foundation
Pile and Group Pile
Drilled Shaft Caissons
Pile Drivability Analysis
New Pavement Design
Flexible Pavement
Rigid Pavement
Asphalt Reclamation

Stability and monitoring

Excavation Stability Analysis
Temporary Shoring System
Settlement Analysis & Monitoring Program
Slope Stability Analysis
Soil Erosion Control

Notable geotechnical projects

Belmont North Relief Interceptor, Indianapolis, Indiana - project value listed by 7NT at 94 million dollars
Castleton Relief Sewer, Indianapolis, Indiana - project value listed by 7NT at 20 million dollars
Derek R. Guthrie Water Quality Treatment Center Rock Anchor Installation Project, Louisville, Kentucky - project value listed by 7NT at 80 million dollars
USACE Detroit/Chicago Geotechnical IDIQ Contract across OH, IN, MI, WI, IL, MN, and KY - project value listed by 7NT at 750,000 dollars

How 7NT works

Service process

Study the project constraints, site history, available records, and risk profile.
Plan field exploration, sampling, testing, and instrumentation to support the design decisions.
Analyze subsurface, groundwater, foundation, pavement, retaining, stability, and ground improvement needs.
Deliver practical recommendations that connect investigation data with constructible project decisions.