Topics Technology & Engineering

Thomas Mill Covered Bridge on the Wissahickon

Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)

Queen Lane Water Works (1894)

Roxborough Works (1869)

Germantown Works (1851) and Mt. Airy Works (1882)

The Chestnut Hill Works (1859-1911)

1902 photo of Upper Roxborough Filter beds under construction

Upper Roxborough Filter Bed Construction, 1902