500kV Transmission Line Rebuild - West Virginia

Foundations

Aug 11

Power | Drilled Shafts | Foundation | West Virginia

Project Summary

This multi-phase project aimed at reconstructing a critical transmission line spanning approximately 64 miles through West Virginia into Virginia. The project was executed in three phases, each addressing the line's steep and challenging terrain in the Alleghany Mountains.

Phase 1: Rebuilding 22 miles of transmission line, supported by 127 new lattice towers and 508 drilled shaft foundations. These foundations, ranging from 3 to 5 feet in diameter, were embedded up to 27 feet deep, with over 400 cubic yards of rock excavation and permanent casing installed as needed.

Phase 2: Construction of 66 lattice towers with 248 drilled shaft foundations, ranging from 3 to 4 feet in diameter and up to 30 feet deep. This phase required permanent casing installation and was completed during an outage to ensure environmental compliance.

Phase 3: Installation of 284 drilled shaft foundations for 71 lattice towers across 20 miles. Extensive rock removal was necessary due to the rugged terrain.

Throughout the project, Aldridge maintained strict adherence to safety and environmental regulations, successfully delivering the rebuild on schedule.