
The Potomac River corridor serves as a busy industrial and transportation artery in this late nineteenth-century survey, where the Chesapeake and Ohio Canal parallels several major rail lines. Near the northern bend at Hancock, the landscape is defined by steep ridges like Tonoloway Ridge and Timber Ridge, which forced engineering solutions for the Baltimore and Ohio Railroad and the Western Maryland Railroad. A notable industrial presence is marked by the Glass Sand Factory along the river, while the historic Fort Frederick stands watch near Big Pool.
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