Chatham Mill

Chatham Mill is a cotton spinning mill built in 1820, with an extension added in 1823 along Lower Ormand Street. The building is constructed of brick and features a slate roof with clerestory windows. The original section of the mill is six stories tall and has 17 bays, with the site of an internal engine house located against the southwest gable wall. This area includes a partially blocked round-arched opening that has been altered by a 20th-century loading bay, along with the remains of a chimney aligned to the northwest.

The rear elevation has taking-in doors on all floors towards the center, reinforced with cast iron. An entrance leads to a staircase located in a rusticated arch at the northeast corner, within an archway that opens into a courtyard formed after the mill's extension. Each bay features small rectangular windows with cambered brick heads. The four-story, 12-bay wing facing Lower Ormand Street has a courtyard entry to the left and a central doorway.

Inside, the original range has timber floors supported by cast iron columns, while the 1823 wing features fireproof construction with cast iron columns and beams that support transverse brick arches. The layout of the mill, including the position of the taking-in doors, suggests it may have originated as a room and power mill. Chatham Mill is included as a typical and coherent example of an early 19th-century mill, demonstrating a single range that has been extended to form an L-plan, which reflects a common pattern of growth during that period.