- All
- Access and Exploratory Shafts
- Cell Towers
- Foundation Piers
- Substations
- Transmission Lines
Bondurant Substation
Description: In addition to transmission lines, Tri-State has also done a fair share of substation ...
Norfolk Southern RR Bridge
Description: Tri-State’s expertise in wet conditions and rock applies well to many bridge foundation applications. ...
Minnesota Historical Society Building
Description: An unusually tight schedule and deep excavations to rock made this project a good ...
Secant Wall
Description: Tri-State installed this secant wall to secure an AEP four-legged tower from erosion by ...
Cell Towers
Description: Similar to transmission lines, cell tower work has a requirement for quick-response and high-mobility. ...
Ford Parkway Shaft Project
Description: Tri-State's ability to maintain a small footprint came into play during the installation of ...
Tehachapi Renewable
Description: With a goal established that by 2020, 33% of all energy in the state ...
Meadowbrook-Loudoun
Description: Dominion’s Meadowbrook-Loudoun is a 65-mile 500-kV transmission line (part of the Trail Project), located ...
Arrowhead-Weston
Description: Arrowhead-Weston is a 220-mile transmission line connecting Duluth, Minn., with Wausau, Wis. The project, ...
CAPX2020 La Crosse
Description: After the need was determined for an electrical interstate system connecting Minnesota, South Dakota, ...
Center to Grand Forks
Description: Starting in the spring of 2012 crews began work on the mammoth 1352 foundation ...
Middletown-Norwalk
Description: One of the largest and toughest jobs in Tri-State’s 60-year history, CP&L’s Middletown-Norwalk included ...