Saturday, January 20, 2018


Scope of Work
Cianbro is constructing a five-mile, 138 kV transmission line extension from Landover, Maryland to Amtrak’s Ivy City Yard in Washington, DC. The project also includes the construction, testing and commissioning of a new 138 kV – 12 kV, single-phase substation at the Ivy City Yard.

Project Details
Transmission Line construction includes:
  • Installing 66 steel transmission line structures with drilled pier foundations
  • Removal and replacement of existing transmission line conductor and static wire
  • Framing and installation of associated line conductors, static wire, and insulators 
  • Removing and disposing of existing U2 feeder system
Substation construction includes:
  • Installing138 kV motor operated disconnect switches
  • Installing traction power transformers
  • Installing 12 kV disconnect switches, circuit breakers cabling, and feeders
  • Construction of substation control building with relay control panels
  • Installing auxiliary power, lighting, grounding, P&C cable, terminations and SCADA 
  • Performing civil work consisting of demolition, grading, utilities, fencing and drainage systems and access road construction

Unique Challenge

The project is uniquely challenging due to working adjacent to a live railroad. The adjacent track is part of Amtrak’s Northeast Corridor; a heavily used route with trains traveling in both directions at speeds reaching 125 mph.

Project Information


Type of Project:
Electrical Transmission & Distribution

Construction Schedule:
Start: June 2009
Complete: January 2011

Washington, DC
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