Tunnel final lining was 72", 66" and 48" RCP plus 42" Hobas. All pipe was placed by Triad’s pipe setter and blocked. The lining was then grouted in place. Open cut sewers were ...Read More...

This high profile project included a number of unique challenges: Two tunnels were to be installed from one access shaft to one dead end and Read More...

Triad excavated four different circular shafts in varying soft ground conditions with some underlying rock near the bottom of two shafts. The soft ground varied from Read More...

Triad was the managing partner of the Triad Frontier Kemper Joint Venture. The Joint Venture completed the Pearl River CSO Tunnel Project in Read More...

The project consists of 2200 lf of 7’ diameter excavated tunnel using ribs and lagging. There are two headings, each of which will work Read More...

Water and sewer relocations in high profile highway, urban and hospital zone of Charleston, SC. Project contained multiple utility conflicts, traffic Read More...

Complete replacement of pump station and controls. Temporary power and pump station installation and operation during new pump station Read More...

Replacing numerous 8” to 12” sewers within the Old Village Area from manhole to manhole, approximately 10,850 feet Read More...

Nine access shafts excavated from 30-70 feet in depth in diameters from 20-36’. Three shafts were in soft silts and clays using ... Read More...

Tunnels, microtunnel and shafts were completed ahead of schedule. Scheduling conflicts with the open cut due ... Read More...