T-Mobile is planning to modify an existing telecommunications facility located on an approximately 90-foot tall (overall height) building at 500 East Market Avenue, Iowa City, Johnson County, Iowa 52245 (41° 39' 50.3" N, 91° 31' 42.7" W). Eocene is publishing this notice in accordance with Federal Communications Commission regulations (47 CFR § 1.1307) for Section 106 of the National Historic Preservation Act (NHPA) and for the National Environmental Policy Act (NEPA). Parties interested in commenting on this Federal undertaking or with questions on the proposed facility should contact Eocene at 5930 Grand Avenue, West Des Moines, Iowa 50266 or call 515-473-6256 and reference project # T-Mobile MWR-80-CM. May 14 2026 LIOW0516028