Cheatham County Generation Site EIS Scoping Report
bucket trucks. Tree removal is not anticipated and if required would be a negligible amount. Modifications would generally be limited to the existing access road area, and, if needed, tree trimming to allow vertical clearance. Minimal ground disturbance is expected in these areas, but, if the ground is disturbed, the access road area would be revegetated using native, low-growing plant species after required TL upgrade work is completed. Areas such as pasture, agricultural fields, or lawns would be returned to their former condition. 3.2.6.2 BESS The BESS would be a 100-MW (400 MW-hour) system and would occupy approximately 10.5 acres. As noted in the 2019 IRP, such facilities typically consist of batteries, supervisory and power management system, HVAC system, and fire prevention system in modular shipping-style containers on a concrete pad with spill containment. Other components include electrical switching equipment, inverters, and transformers. 3.2.7 General Construction Activities Construction activities associated with the CT plant would occur at the CHG site. Related external construction could also occur on the natural gas supply systems. At full buildout, the plant would occupy approximately 75 acres on site, and an additional 15 acres on site would be used for equipment laydown and mobilization. Subsurface piles or other deep foundation systems would be installed to support foundations for plant components, as required. Larger project equipment could be delivered to the project site by truck. Most delivered items would be placed in project laydown areas to await installation. Any temporary access roads for construction offsite would be designed in accordance with U.S. Department of Transportation and relevant local requirements. Site preparation work for the proposed CT/Aero plant and associated equipment would begin in 2026 and the plant would begin commercial operation as early as winter 2028. Approximately 200 workers would be employed onsite during peak construction activity. 3.3 Other Alternatives Considered TVA considered various resource types for replacement of generating capacity lost as a result of retiring the CUF second unit. The replacement capacity must be capable of providing year-round capacity as well as serving energy needs as CUF serves an intermediate function. To be viable, replacement generation resources needed to be mature technologies capable of being constructed and installed within the CUF retirement window. TVA considered, but dismissed the following resource options: • Natural Gas-Fired and Oil-Fired CC • Natural Gas-Fired and Oil-Fired Simple Cycle Frame CT • Natural Gas-Fired and Oil-Fired Simple Cycle Aeroderivative CT • Stand-alone BESS • Hydro Pumped Storage • Small Modular Reactors (SMR) • Utility- and/or Distributed-Scale Photovoltaic (PV) Solar
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