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Commission recommends approval of ISG’s request to add exterior fuel storage tanks

Mankato Planning Commission · February 25, 2026

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Summary

The Mankato Planning Commission recommended approval of ISG’s conditional use amendment to add multiple exterior fuel tanks and generator testing enclosures at 1711 Energy Drive, subject to screening, noise‑control and emergency‑response plan conditions. The item moves to city council on March 9.

Britney Mitchell, presenting for city staff, summarized an ISG amendment to a 2019 conditional use permit at 1711 Energy Drive to allow additional exterior fuel storage tanks that support on‑site generator testing. She said the proposed additions include two 5,000‑gallon diesel tanks, one 1,900‑gallon liquid propane tank, a 300‑gallon diesel day tank and two 500‑gallon diesel day tanks; the tanks meet the size threshold requiring a CUP and staff recommended conditions for screening, compliance with fire and MPCA standards, noise controls, and an emergency response plan to be submitted to the Department of Public Safety.

Mitchell said the testing areas will be enclosed and screened and that a noise study had been prepared. Staff recommended approval with conditions that the applicant provide screening consistent with Mankato code, conform to MPCA noise standards, supply required photometric lighting plans, submit an updated drainage report and a SWPPP at time of building permits, and provide an emergency response and action plan for public safety review.

No members of the public spoke. A commissioner moved approval, the motion was seconded, and the commission voted to recommend approval and forward the item to city council with an anticipated council review date of March 9.