Field Office Compliance - Field Activity - 103373

Next Era Energy Duane Arnold Energy Center - 310377472

3291 Daec Rd Palo, IA 52324

Linn County

FO 1

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Activity Report

Attached Files/Reports

Document Name	Type	File Date	Note
5700104_FO1_020626_01.pdf	Inspection Report (public)	02/04/2026

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Comments

Date	Comment	Commenter
2/6/2026	The plant is expected to return to service in late 2028 or early 2029. Current work to restart and reopen the plant and its associated facilities is ongoing with current employees using wastewater facilities not connected to the plant’s infrastructure, primarily port-a-potties. The sequencing batch reactor (SBR) wastewater treatment plant was decommissioned on May 4, 2023. The facility used an AdvanTex septic system to treat domestic wastewater that was permitted through Linn County. They ceased using this septic system in March of 2025. As more employees are returning to the plant, the SBR is being used as a septic holding tank until such time that enough employees are back in the plant for proper and efficient use of the SBR (as engineered) to resume. A contractor will be used to remove and dispose of waste water in the SBR tank until it has been restarted. Mr. Casey anticipates that approximately 300 employees will need to be back at the plant for the SBR to be restarted and that this milestone could be reached by early to mid-2027.	JEFFREY SCHWIERJOHANN

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Compliance Tracking

Action Type	Date	Completed Date	Comment	Delete