Combined-Cycle Generating Station
A 1,100 MW combined-cycle plant built from the foundation mat up, with turbine pedestals placed to tolerances measured in thousandths of an inch.
- Owner
- Confidential
- Location
- U.S.
- Market
- Power & Utilities
- Delivery
- EPC
- Scale
- 1,100 MW
- Completed
- 2026
A 1,100 MW combined-cycle plant built from the mat up: mass-concrete turbine pedestals, anchor bolts set to the millimeter and first fire on the date the grid operator booked.
A combined-cycle plant stands on its foundations. Gas and steam turbine pedestals are massive reinforced concrete structures that must carry machines spinning at 3,600 RPM with almost no vibration. Anchor bolts had to land within tight tolerances, mass concrete had to be cooled to prevent cracking, and the plant had to be ready for first fire on the date booked with the grid operator.
The approach.
- 01
Mass concrete under control
Pedestal and mat pours used low-heat mixes, cooling pipes and embedded temperature sensors, with a thermal control plan for every placement.
- 02
Anchor bolts set by template
Steel templates held every anchor bolt group through the pour, and survey checked positions before, during and after placement.
- 03
Foundations ahead of machines
Our self-performed foundation crews worked to the turbine delivery dates, so each machine arrived to a cured, surveyed pedestal.
- 04
Commissioned system by system
Fuel gas, water, steam and electrical systems were turned over and tested one by one, building up to first fire and full load.
The outcome.
“A turbine pedestal gets one pour. We plan it for months, place it in a day, and it carries the machine for the next thirty years.”
Foundations superintendent, PerryWester
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