1906 Map of Carnegie

About this map

The industrial and agricultural convergence of the Pittsburgh region is on display here, where the Ohio River, Allegheny River, and Monongahela River meet. This early-century landscape is defined by its complex drainage and rail systems, notably the Pittsburg Cincinnati Chicago and St Louis Ry which links coal-rich hills and valley settlements. The terrain is deeply carved by watercourses like Chartiers Creek and Montour Run, leading to a settlement pattern where towns like McDonald and Oakdale follow the low ground. A fascinating layer of local history is visible in the hyphenated post office designations, such as Treveskyn Cuddy PO and Gladden Gradatim PO, reflecting the dense, evolving community nodes of the era. The County Home and Cliff Mine stand as markers of the social and economic priorities that shaped this portion of Allegheny and Washington Counties before modern suburbanization.