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  • 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 ...
Foundation Piers

Norfolk Southern RR Bridge

Description: Tri-State’s expertise in wet conditions and rock applies well to many bridge foundation applications. ...
Foundation Piers

Minnesota Historical Society Building

Description: An unusually tight schedule and deep excavations to rock made this project a good ...
Foundation Piers

Secant Wall

Description: Tri-State installed this secant wall to secure an AEP four-legged tower from erosion by ...
Cell Towers

Cell Towers

Description: Similar to transmission lines, cell tower work has a requirement for quick-response and high-mobility. ...
Access and Exploratory Shafts

Ford Parkway Shaft Project

Description: Tri-State's ability to maintain a small footprint came into play during the installation of ...
Transmission Lines

Tehachapi Renewable

Description: With a goal established that by 2020, 33% of all energy in the state ...
Meadowbrook-Loudon 81 - Version 2
Transmission Lines


Description: Dominion’s Meadowbrook-Loudoun is a 65-mile 500-kV transmission line (part of the Trail Project), located ...
Front Royal Going in with the Core Barrell
Transmission Lines


Description: Arrowhead-Weston is a 220-mile transmission line connecting Duluth, Minn., with Wausau, Wis. The project, ...
CAPX La Crosse-img
Transmission Lines

CAPX2020 La Crosse

Description: After the need was determined for an electrical interstate system connecting Minnesota, South Dakota, ...
Good initial cleanup results achieved at foundation pad locations
Transmission Lines

Center to Grand Forks

Description: Starting in the spring of 2012 crews began work on the mammoth 1352 foundation ...
Transmission Lines


Description: One of the largest and toughest jobs in Tri-State’s 60-year history, CP&L’s Middletown-Norwalk included ...