TOP 30 River lock system in Granite City, Illinois

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Lock No. 27, also known as the Chain of Rocks Lock, is a vital component of the US Army Corps of Engineers' navigation system, situated in Granite City, Illinois. As the southernmost lock on the Upper Mississippi River, it plays a crucial role in facilitating the smooth transit of commercial and recreational vessels through one of America's most significant waterways. Visitors to Lock No. 27 can witness the impressive engineering and operational processes that ensure the efficient movement of goods and resources along the river. The site offers a unique opportunity to learn about the history and importance of river navigation, with knowledgeable staff available to provide insights into the lock's operations and the broader mission of the US Army Corps of Engineers. Whether you're a maritime enthusiast or simply curious about the inner workings of this essential infrastructure, Lock No. 27 promises an educational and engaging experience.