Blue U.S. passport found near riverfront at Diamond Jo Casino

I found a blue U.S. passport this afternoon around 4:15 pm along the riverwalk near the Diamond Jo Casino in Dubuque. The cover is a bit worn, with the gold crest still visible but the corners dog-eared from travel. Inside, the photo page shows a name starting with 'A,' plus a couple of stamped dates from past trips and a faint coffee ring near page 2. There’s also a tiny sticker from a language school on the back cover. It’s a nerve-wracking thing to lose, so I’m hoping to get it back to its rightful owner as soon as possible.