Public Notice Antidegradation Alternatives Analysis for the City of Boone, Iowa Notice Date: April 23, 2026 Notice is hereby given that the City of Boone, Iowa has completed a draft antidegradation alternatives analysis for discharge of treated wastewater to Honey Creek, a tributary to the Des Moines River. The action being considered is an expansion to the existing activated sludge wastewater treatment facility that will result in an increase in discharge, and addition of processing chemicals. Honey Creek is protected for Class A2 secondary contact recreational and B(WW-2) warm water beneficial uses. Anyone wishing to comment on the proposed treatment alternative must do so in writing within 30 days of the date shown at the top of this notice. Comments may be submitted to the Engineer by hand delivery, mail or email: Short Elliott Hendrickson, Inc., 5414 NW 88th Street, Suite 140, Johnston, IA 50131, cmccracken@sehinc.com. Copies of this notice, the draft antidegradation alternatives analysis and supporting information are on file and available for public inspection from 8:00 AM to 4:30 PM Monday through Friday at the above address with prior appointment. Copies of this information may be requested by contacting Christina McCracken, PE by email or in writing at the above address. The City of Boone will submit a summary of comments received and facility's responses to the Iowa Department of Natural Resources with the final alternatives analysis subject to IDNR review and approval. April 23 2026 LIOW0501804