- Date: February 2015
- Location: , Highland CA
- Category: Transmission, distribution, excavation and substation
- Project Owner: SCE Transmission
International Line Builders placed eight 10 foot x 20 foot vaults and 6,900 feet of trench with six 5-inch concrete encased duct bank. This underground system was built for the removal of a section of 33kV and 66kV overhead lines.