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Portfolio Overview

Southern Illinois Generation Company (“SIGC” or “SIGenco”) owns a diversified portfolio comprising low operating cost, simple-cycle and combined cycle natural-gas assets located throughout downstate Illinois in MISO Zone 4.

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GIBSON CITY

Gibson City, Illinois

COD 2000
Capacity 242 MW (summer rating)
Baseload Heat Rate 11,700 Btu / kWh
Location Gibson City, IL
Technology / Fuel Type CT / Natural Gas
MISO Zone Zone 4
Equipment 2 Siemens-Westinghouse 501D5A
Electric Interconnection 138 kV
Gas Interconnection Natural Gas Pipeline of America (NGPL)
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Shelby County

Neoga, Illinois

COD 2000 / 2001
Capacity 352 MW (summer rating)
Baseload Heat Rate 9,600 Btu / kWh
Location Neoga, IL
Technology / Fuel Type CT / Natural Gas
MISO Zone Zone 4
Equipment 8 x GE LM6000
Electric Interconnection Ameren 138 kV
Gas Interconnection Trunkline Natural Gas
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Grand Tower

Grand Tower, Illinois

COD 2001
Capacity 529 MW (summer rating)
Baseload Heat Rate 7,800 Btu / kWh
Location Grand Tower, IL
Technology / Fuel Type CCGT / Natural Gas
MISO Zone Zone 4
Equipment 2 Siemens-Westinghouse 501FD2
Electric Interconnection Various – 138 kV and 69 kV
Gas Interconnection Natural Gas supply line via NGPL
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