Designed a 1 mile line extension to loop a 115 kV line through a 3 breaker switchyard to interconnect a 65 MW landfill-gas powered co-generator to the transmission system.  
Transmission line:

• Eight single circuit, single pole, steel structures
• Two single circuit, double pole steel structures
• Twelve concrete caisson foundations
• One circuit mile of 1590 ACSR conductor and one mile of optical fiber composite overhead ground wire 

Substation:

• Three 115 kV - 3000 A gas-insulated breakers and associated breaker isolation disconnect switches
• Two 115 kV - 3000 A motor-operated line disconnect switches
• Two sets of line CCVTs with B phase wave traps
• A 115 kV primary metering package
• Steel switchyard support structures for 115 kV bus, switches and instruments.
• Cable raceway
• A prefabricated control building fully fitted with control, relay and communication panels, AC and DC panels, HVAC, and auxiliary services
• Diesel emergency generator