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We had seen several aIrplanes flying low over the river just before we got to Dubuque. A few miles below lock #11, the law doggies were stopping traffic on the river. I thought they were practicing for the NASCAR flyover. Seems they have an airshow over the river on the 4th. Lucky for us, the practice only lasted 15 minutes after we arrived, and they opened the river. A lot of boats on the river near Dubuque.
Since boats were backed up, we had to lock through with 8 other boats. We were the second smallest. The locks here don't have floating bollards. The lockmaster throws down a 1/2 " line for you to hold.
In addition to the red and green floating buoys, there are daymarks scattered along the river. Each has a mile marker, and each is known by a name which shows up on the charts. Some are named after people. I remember passing the John Hartford daymark on the Cumberland River. Today, we passed another familiar name on a daymark. On the RDB, at mile 587.2, we passed the Zollicoffer daymark. Our family members know Felix as a Civil War General at Mill Springs, KY.