Seminole 138-kV Substation

Seminole 138-kV Substation

Location: League City, Texas

Client: Texas-New Mexico Power

Completion Date: May 2004

Burns & McDonnell provided engineering, procurement, construction, testing and commissioning services related to the new Seminole Substation for Texas New Mexico Power. The Seminole substation project consisted of one 138-kV six-ring position bus (three breakers for this project and three breaker positions for the future), one 28MVA 138-kV/15-kV transformer, and one 15-kV distribution bay (one main and four feeder breakers).

Burns & McDonnell was responsible for site development, city permits, civil/structural/electrical design, procurement of equipment (control house, panels, substation materials, steel/concrete poles), construction and testing. Burns & McDonnell was also responsible for coordinating with soil report, survey, site development, erection and testing contractors. In addition, Burns & McDonnell provided engineering/procurement/construction services for upgrades to the League City and the Friendswood Substations, required for the new Seminole substation. Burns & McDonnell also replaced existing static wire with OPGW from Friendswood Substation to Seminole Substation and implemented a new transfer trip scheme.

The Seminole 138-kV Substation is located on the west side of I-45 in League City, Texas. This site is served by a combination of all-weather, gravel and unimproved dirt roads. The project was finished and energized as scheduled in May 2004.