[1] The Warren paper mill is a large sprawling industrial complex spanning the Presumpscot River just north of Cumberland Street in central eastern Westbrook.

[2] A paper mill was established on this site in the 1730s, when it was a rural and fairly unpopulated area.

Nine years later in 1863, an additional machine was added to the mill, and the production increased to 11,000 pounds per day.

The mill continued to grow through the 20th century, employing close to 3,000 Westbrook residents.

Warren Company as a wholly owned subsidiary until 1994, when it sold this leading producer of light-weight and heavy-weight coated papers.

Included in this listing were the mill itself, a row of Shingle style worker housing on Brown Street (from designs by John Calvin Stevens and Andrew Jackson Downing), and the elaborate Queen Anne Victorian home of Warren's son John, located across Cumberland Street from the mill.

The last standard gauge locomotive was sold to the Maine Central Railroad when Portland Terminal Company took over millyard switching work in 1929.