SEPTA, Rehabilitation of Substations
SEPTA is one of only two U.S. transit authorities that operates all four of the major electric-powered modes of transit: regional suburban commuter rail, urban heavy rail, interurban light rail, and trolley buses (“trackless trolleys”). These electric transit modes are powered by either 12kV ac for its regional rail lines or 630Vdc for its subway, light rail, and electric trolleybus routes.
Envision is providing design-phase cost estimating and scheduling services for the $125 million rehabilitation and upgrade of 16 traction power substations and the construction of one new substation. The scope of work is to provide SEPTA cost estimates for 15% to 50% design phases to upgrade substations to as-new condition. Beyond 50% of the project will be let as a design build to contractors to complete the design and construction. Equipment evaluated includes autotransformers, outdoor and indoor circuit breakers, auxiliary transformers, disconnect switches, low voltage systems, etc. Site visits were made to each station to understand site logistics primarily for getting equipment in and out of the locations. Envision worked with the project team to develop estimates, which coincided with final design requests. Architectural and structural factors were also included in the costing process.
- Cost Estimating