Fortune 500 Power Company
69kV Substation Site Expansion
Our work empowered this client to achieve their electrical, structural, and civil engineering goals for this key transmission station redesign.
This Fortune 500 Power Company provides power generation, transmission, and distribution for more than five million customers across the nation. Their aim is to support businesses, commerce, and communities through reliable service and solutions.
When this client needed to upgrade existing 23kV transmission lines to a 69kV system that could accommodate their customers’ growing needs, they turned to Salas O’Brien for electrical and structural engineering services. The client’s transmission lines were already built up to 69kV standards, but the conversion required an expansion to the existing station, installation of new equipment, and integration with existing right-of-ways. One of the key challenges of this design was consideration of construction sequencing. In order to safely install new equipment, construction personnel would need to maintain adequate distance and separation from live equipment, and new equipment must be ready for operation before existing live equipment could be discontinued.
Our design solution expanded the station’s footprint so that new equipment could be constructed without premature disruption of the existing live station. Our team’s solutions also prevented multiple voltage lines from crossing by strategically relocating distribution poles and line takeoff angles to create an acceptable clearance between the lines. During the grading of the expansion area in the construction phase, our client discovered an increased slope that could cause storm water drainage onto the site. Although site preparation was not originally part of our scope of work, the client was able to leverage our civil engineers’ expertise to solve the storm water drainage issue.
Our designs, along with supplemental site visits, empowered the client to achieve their right-of-way, civil, electrical, distribution, and station engineering goals. The project was completed on time and under budget, and its overall success further strengthened our client’s confidence in Salas O’Brien’s capabilities and exceptional standards.