Gordie Howe International Bridge
Bridges
Project details
Foundation verification and geotechnical engineering support for the international bridge corridor.
7NT Enterprises, LLC
Proper Execution with Precision
About the firm
7NT Enterprises, LLC is a specialized geotechnical engineering and drilling practice involved in the design and construction of deep tunnels. Founded in 2008 by Pratap Rajadhyaksha, PE, it supports water, wastewater, and transportation infrastructure projects with complex drilling, accredited materials testing, construction inspection, and geotechnical engineering. Headquartered in Miamisburg, Ohio, it emphasizes precision and careful execution, drawing its name from the highest contract in the card game of bridge.
- Established
- 2008
- Team
- Small
- Firm type
- Geotechnical Engineering · Civil Engineering · Materials Testing
Credentials
AASHTO Laboratory Accreditation · ODOT Laboratory Accreditation · INDOT Laboratory Accreditation · USACE Laboratory Accreditation
People
Pratap RajadhyakshaFounder and Owner
Capabilities
Drilling Services
Service websiteHighly specialized geotechnical drilling for deep tunnel, water, wastewater, and transportation infrastructure, utilizing owned drill rigs to reach depths of up to 450 feet.
- Rock Coring and Soil Sampling
Gathering quality samples to test critical properties such as abrasivity, moduli, drillability, and hardness.
- Hydraulic Conductivity Testing
Performing packer testing with vibrating wire transducers to determine water movement within rock formations.
- Piezometer Installation
Installing standpipe and vibrating wire piezometers to record long-term seasonal groundwater conditions.
- Instrumentation and Casing
Installing inclinometer casings, borehole extensometers, downhole pressuremeters, and dilatometers.
Inspection and Testing
Service websiteAccredited quality assurance services spanning construction inspection and physical materials testing.
- Construction Inspection
Field inspection services including reinforcing steel, structural steel and weld, building, earthwork, utility, levee, and tunnel boring machine operations.
- Materials Testing
Laboratory and field testing of soil, concrete, structural steel, asphalt, and masonry following ASTM methods.
- Geotechnical Laboratory Services
Physical and chemical analysis of soil and rock, with accreditations from AASHTO, ODOT, INDOT, and USACE.
- Roofing Services
Inspection and testing of roofing systems including materials verification, installation inspection, built-up construction, and infrared surveys.
Engineering
Service websiteSpecialized geotechnical, civil, and environmental engineering services, particularly for combined sewer overflow control and water and wastewater infrastructure.
- Geotechnical Engineering
Subsurface investigations, engineering analysis, and planning for complex tunnels, bridges, and lock foundations.
- Water and Wastewater Engineering
Specialized engineering and combined sewer overflow planning to mitigate runoff through deep storage tunnels.
- Surveying
Professional surveying services to support planning, design, and construction phase activities.
Construction
Service websiteTargeted construction capabilities specializing in trenchless and rehabilitation projects for utility networks.
- Manhole Rehabilitation
Repair and rehabilitation services to extend the service life of wastewater collection systems.
- Sewer Repair
Targeted repair operations for municipal and industrial sewer infrastructure.
Industries
Wastewater · Water Supply · Tunnels · Bridges · Infrastructure
Projects
MI Soo Lock Phase 3 New Third Lock Foundation Verification Drilling
Infrastructure
Project details
Foundation verification drilling and geotechnical testing for Phase 3 of the Soo Lock project.
Potomac Interceptor Project
Wastewater
Project details
Geotechnical investigation and engineering services for the Potomac Interceptor sewer infrastructure.
Ohio River Tunnel
Tunnels
Project details
Deep geotechnical drilling services for the Ohio River Tunnel combined sewer overflow project.