Ames council names coal‑yard site preferred location for new gas generation; staff to start design

The Ames City Council on Aug. 12 approved a staff recommendation to designate the city‑owned coal‑yard property near the existing Ames Plant substation as the preferred site for new generation to replace aging units, directing staff to proceed with detailed engineering and design. Staff and consultants presented multiple siting options — northwest and southeast parcels, industrial park areas and the coal yard — and analyzed gas supply, proximity to the 161 kV transmission network, permitting and visibility and cost differences. The council voted to approve the coal‑yard site as the preferred location.

Staff said the city needs new generation because Unit 7 (built 1967) is approaching the end of its useful life and replacement capacity is required by May 2028. The city’s search prioritized proximity to a 161 kV line, adequate natural gas supply (staff estimated an 11,000 dekatherm peak need) and the ability to distribute power across the city for reliability during transmission outages. "One of the core focuses is having generation within the city so that if the outside transmission world falls down we have this generation to pick ourselves up," staff said.

Alternatives studied and rationale

Staff examined several alternatives at a high level. Sites away from existing transmission (northwest acreage and south/east industrial parcels) would have required new substations or long new 161 kV line segments and additional gas infrastructure, adding roughly $24–25 million…