About 7NT
A specialized geotechnical firm built around deep tunnel expertise, precision, and client trust.
Highly specialized geotechnical engineering.
7NT is a highly specialized geotechnical firm heavily involved in the design and construction of deep tunnels. These tunnels are used as massive storage facilities in the water and wastewater treatment industries as well as transportation conduits through mountains and under streams.
7NT was formed in 2008 by Pratap Rajadhyaksha, PE, a 45-year veteran of the engineering and construction industry. After graduating from MIT, Pratap spent the first 30 years of his professional career helping to build one of the largest privately held engineering firms in the Midwest.
7NT has professional and technical staff specializing in complex drilling, laboratory services, geotechnical engineering, civil engineering, environmental services, surveying, construction management and inspection, materials testing, manhole rehab, and sewer repair.
7NT is the symbol for Seven No Trump, the highest contract in the game of Bridge. Proper execution of that contract requires great care and precision, reflecting the way 7NT delivers services to clients.
Our Philosophy
Integrity. Reliability. Performance.
Integrity
When 7NT enters into an agreement with a client, the team delivers what it commits to deliver, when it commits to deliver it.
Reliability
Clients understand that 7NT will do whatever it takes to get the job done on time, under budget, and with high quality.
Performance
7NT thinks constantly on its clients' behalf and explores better ways to deliver each project.
Recent projects
Current signals from the field
Potomac Interceptor Project
Helicopter-supported geotechnical investigation for a critical sanitary sewer interceptor near Great Falls Park.
EngineeringMI Soo Lock - Phase 3 New Third Lock Foundation Verification Drilling
Foundation verification and instrumentation drilling for improvements to the northern approach channel and New Lock construction.
EngineeringGordie Howe International Bridge
Geotechnical drilling and technical support for one of North America's largest bridge infrastructure projects.