Holland Neoga T-Line
This 16-mile transmission line started with the Holland NW Substation in Shelby, IL and ended with the Neoga S. Substation in Neoga, IL.
This 16-mile transmission line started with the Holland NW Substation in Shelby, IL and ended with the Neoga S. Substation in Neoga, IL. Following the completion of the project, an electrical contractor was able to upgrade the old 345kV line to a new, double circuit 345kV line on monopoles, carrying more capacity and reducing the footprint on the surrounding farmer’s fields. The Holland-Neoga transmission line’s voltage required a clearance of 20 feet. This line also had the ability to sag depending on the amount of voltage being transmitted and ambient heat, so all crew leaders conducted daily and hourly checks on the height of the line to guarantee crew safety. The team placed 102 drilled pier foundations in soils consisting of clay, shale, limestone, and glacial till. The largest pier was an 11’ diameter with 52’ embedment, and the smallest pier was a 7’ diameter with 19’ embedment. All drilling and the placement of the foundations were completely self-performed by Keeley.