Quad Cities, Mississippi River

Isn’t it fascinating how a cluster of communities can grow so closely together that they end up identifying as the Quad Cities, even when there are five of them in the mix? Davenport and Bettendorf in Iowa, along with Rock Island, Moline, and East Moline across the river in Illinois, have long shared enough history and momentum to claim a collective name. “Quint Cities” was briefly floated, but the older title had already settled in, and no one seemed keen to let it go.

What draws me in—beyond the maths of it all—is how the place feels like a tight community spread across two states. Each city has its own character: Rock Island, with its military legacy; Davenport, full of cultural landmarks and riverfront trails; Moline, tied deeply to manufacturing; East Moline, with its quieter charm; and Bettendorf, brimming with leafy neighbourhoods. Together they share the same river that shaped their fortunes, and from the water you can really see how life here has revolved around crossing, connecting, and making the most of this bend in the Mississippi.

Because I’m forever curious about bridges, this stretch of the river is a bit of a dream. The Government Bridge sits beside Arsenal Island and features a swing span, allowing river traffic like mine to pass through. It’s a dual-purpose structure, carrying trains on the upper deck and vehicles below. This arrangement wasn’t just for convenience; in the early days, locomotives produced so much smoke and noise that horses pulling carriages on the bridge would panic if trains thundered beneath them.

The bridge wasn’t the first attempt to link Rock Island with Davenport. In 1856, a wooden railroad bridge slightly upriver opened to connect the east with the west, and barely two weeks later, the steamboat Effie Afton struck one of its piers and caught fire, taking part of the bridge with it. The resulting lawsuit could have ended the bridge altogether, but it was defended by none other than Abraham Lincoln, still a practising lawyer at the time. The claim was that rail bridges had no business on the river and were a public nuisance. In the end, the judge ruled that river traffic had the right of way and rail bridges were here to stay. 

Further along is the Centennial Bridge, designed with five graceful arches rising over the water. Locals often say those arches represent the five cities of the “Quad” Cities, a subtle nod to the region’s stubborn arithmetic. Then there’s the I-74 Bridge, easily recognised by its distinctive oculus window at the highest point. The circular, see-through glass floor allows a clear view of the Mississippi and the marine traffic flowing beneath, which clearly caught my attention as well.

Travelling by motorboat, especially as I continue further downstream, means I also have to consider Lock and Dam No. 15, adjacent to Government Bridge. It is an impressive sight to approach, and rightly so, since it is the longest roller dam in the world at 1,203 ft (367 m). To get through, I radioed the lock operator to let them know I’m here. I listened to their instructions as I eased my way into the massive chamber and waited for the gates to close behind me. Holding my position, I watched the water level change as the downstream gates opened, then continued with my journey.